On the principle of electric valve sealing performance

Electric valve structure is simple, by only a few parts, materials consumption province, small size, light weight, small size, installation, drive torque, pressure regulating valve, simple, agile, simply rotate 90 ° to quickly start closed; and also also has a good flow regulation efficacy and closed sealing characteristics, in large and medium-caliber, low pressure areas of application, is the leading electric ball valve situation.
Electric valve with elastic sealing two kinds of sealing and metal seal type. Elastic sealing valves, strap seals can be mounted on the body or attached to the disc periphery. Take the metal sealed valves generally higher than the elastic sealing valves, long life, but it is difficult to achieve a complete tamper evident tapes. Metal seal can accommodate the higher operating temperatures, with a temperature limit shortcomings.
If the request is dominated electric valve used as a flow, it is important to choose exactly the size and type of valve. Electric valve construction principle is particularly suitable for manufacturing large diameter valves. Electric valve not only in oil, gas, chemical, water treatment and other general industries widely use, but also the use of the thermal power plant cooling water system.
Commonly used with clip-on electric valve electric valve and flange type electric valve two kinds. Clip-on electric valve is connected to the valve stud two pipe flanges, flange type electric valve is a valve with a flange bolts on both ends of the flanges of the valve in the pipe flange convergence.
The strength properties of the valve is the valve can be sustained media pressure. Pressure valves are suffered mechanical products, which must have sufficient strength and rigidity to ensure the long-term use without causing break or deform.

Unsealed controlled pump five advantages exist

Unsealed controlled pump is to fill the gaps in the first product, the product has a temperature and pressure, "one drainage", "lifelong self-absorption" and many other functions. The current production of stainless steel, reinforced polypropylene, cast steel, cast iron and other materials series machine, five different shapes of a thousand kinds of specifications.
1, using the "chain-type multi-faceted pump centrifugal sealing device", get rid of the traditional pump packing meter seals, packing seals, mechanical seals, completely subdued the "run, run, drip, leak," is an alternative to the long axis of the original variety of liquid pumps, submersible pumps, submersible sewage pumps the best equipment.
2, the sealing （cable seals）device is not running friction, no Mo loss, longer life than similar products in more than 10 times.
3, transplant vacuum principle, self-priming, reliable performance, especially the use of "electric air control valve", truly a "one-draining, life-long self-absorption."
4, small vibration, low noise, mobile and flexible, and easy disassembly, easy to install, no foot fixation.
5, with excellent self-control function, and high-tech sectors and supporting the use of highly automated systems.

Rubber seal airworthiness requirements

Aviation use of special rubber sealing profiles environment determines its relationship with other profiles such as automotive rubber seal sealing profiles, sealing profiles equipment , aerospace sealing profiles are different. Its high demands for safety and determine the characteristics of repeated use of special rubber sealing profiles aviation airworthiness must meet various requirements.
Previous aviation special rubber sealing profiles from design to production and use no introduction airworthiness requirements and airworthiness philosophy. As technology continues to progress and people's awareness of their own progress, people sailing on aviation security requirements continue to increase , airworthiness requirements and airworthiness requirements are strictly implement the concept in product design and production processes . Airworthiness simple popular to say that all kinds of products suitable for use in aviation must have all the performance requirements. By air with special rubber sealing profiles , for example, the first rubber Fixed Length plastic seals profiles designed functional design of the product to be able to meet the actual use of the environment , followed by the production of rubber sealing profiles process design and control must be effective and reasonable , for the materials, production technology , product testing process must meet the requirements of various types of control files , and finally produce the product for the flight test must meet environmental requirements . Taking into account the complexity of the aircraft 's flight environment , the test must be carried out to ensure that products meet the design requirements and to meet the requirements of the actual use of the aircraft .
Foreign concept to establish airworthiness requirements and airworthiness earlier . European countries use various types of aviation aircraft with special rubber sealing profiles must obtain airworthiness approval before they are finally installed Office use , domestic air with special rubber seal profile products to export , it must go through a variety of Airworthiness Review Board . Currently a number of aviation with a special rubber seal profile production companies have begun to introduce the concept of airworthiness , strap seals profiles from the design , production, testing process in strict accordance to the requirements of Airworthiness Authority carried out to ensure the production of the products to meet the airworthiness requirements .

Rubber seal for use in the aviation field

Airlines with special rubber sealing profile shapes, according to its sealed form , can be divided into compression seals and pneumatic seals two kinds . Compression of the rubber section with rubber seal and rubber projections point rebound compression stress generated to effect sealing , mainly used in large aircraft and other fields.
Advantages: compression resilient rubber material made ​​high demands . Its sealing sectional structure forms, only the required door seals have ties with the aircraft little correlation with other agencies , the relative independence of the strong .
Disadvantages : long-term repeated use will be caused by aging of the rubber material of the stress relaxation , the sealing effect will gradually deteriorate , while at lower temperatures because of poor low elasticity rubber seal leakage problem occurs .
Inflatable rubber seal closed with the use of a hollow cavity filled with gas , generated by the gas pressure to achieve the expansion of the rubber surface contact with the door bolt seals, the seal section is mainly a closed hollow totally enclosed structure , mainly used in fighter jets and other fields.
Large sealing the gap between the door and the hatch , due to processing, assembly accuracy, or the ambient temperature changes by thermal expansion and contraction deformation , resulting in the gap to be sealed is inconsistent , or the change, and its variation range is generally more than 3mm or even up to 10mm or more , the ordinary seal is difficult to achieve the desired sealing effect. In this case , the need for a change in the seal gap with sealing products . Inflatable seal is to meet the needs of the success of this kind of new technology.
Advantages : the relative compression rubber sealing tape , the material itself is not so high compression performance , the main use of the gas filling pressure to adjust the sealing effect , the prolonged use of supplementary rubber material the stress relaxation , sealing effect achieved consistently , it will not appear at low temperatures because of the low elasticity of rubber seal leak problem worse appear relatively high reliability sealing effect .
Disadvantages : Because of its working characteristics of inflatable seal for airtight seal with integral high demands , barrier security seals sealed with no small parts can cause gas leaks defects which lead to an overall decline in sealing performance , serious or even cause seal failure a major accident ; aircraft other institutions associated with a great degree , maintenance complex .

Seal to enhance plug valves

metal seal plug valve poppet valve seat sealing surface can be sealed on both sides of the valve without the use of media flow restrictions. Metal seal body to enhance type plug is closed, and the valve stem through the hand wheel on the valve seat sealing surface pressure, by increasing the sealing pressure than that enable plug has better sealing performance. Seat sealing surface projection, easy clean sealing surface, the sealing surface is not easy to accumulate crystallization medium, or solid particles. Solid commonly used in the chemical plant high temperature applications. Seal to enhance the structure of a variety of plug valves, there are two common.
A. The handwheel lever hoist plug valves, the working principle is: the rise, the taps and valves fully open. First turn off when the handle is rotated by 90 degrees to the cock closed position, and then turn the hand wheel gear down to seal the cock.
Cock valve opening and closing process again separated from the valve seat, the valve opening and closing is very easy, and the sealing surface in the open or close the process is not easy bruising, valve long service life. But the use of the handle drive torque is small, so use the valve nominal size is usually small. Handwheel handle to enhance type plug compact structure, small size, fluid resistance.
B. Mechanical cross transmission to enhance type plug, works as follows: Open the valve gear rotating the valve stem threads to make cock-ups. Taps and valve sealing surface and then driven out of turn 90 degrees to the cock valve fully open. Drive off when the cock is rotated by 90 degrees to the first closed position, the plug is no longer rotated, the driving force of turning the threaded down after the cock, in contact with the valve sealing surface to security seal.
Mechanical transmission mechanism can be connected to the cross cylinder, electric devices, hydraulic systems and other remote control.
Mechanical cross transmission to enhance type plug, solves insufficient drive input torque limit, the valve to the large diameter and high pressure direction.
Mechanical transmission to enhance cross-channel type plug cocks consistent with the diameter of the pipe, the fluid resistance is small, easy to pigging. In the oil and gas development on the long pipeline is growing.

Auto Repair in handling point on the sealing performance

In the window glass is damaged, changing with the same curvature as the original glass window glass, while the glass to check the guide groove and seal for damage. Because windows often reply after repair is less than its original shape, therefore, when in addition to ensure easy pulling or lifting the window glass, but also pay attention to the window glass in the windows closed after four weeks of the seal.
In the repair of automotive line, should all body holes, holes worn harness ring is mounted at the place, not only because these seals from the seal, but also play a protective role in the harness. If the seal is damaged or harness can be rotated or ran seals, replace the seals, and compares it with the body holes, hole assembly firmly secure the harness is good.
Fix the sealing flange in the vehicle door, the seal should be noted that repair damaged flanges, flange accurately restore the original shape. To carry out the repair after the door seal inspection, the inspection method is: put a hard disk in a sealed position, shut the door, and then pull the paper, according to the Rally to determine the size security ties is good. If the force required to pull the paper too much explanation sealed tight, this will affect the doors close properly, and also due to deformation of the seal over the Omo faster mourning for sealing performance; if the force required to pull the paper too small, indicating bad seal doors wind does not often appear rain phenomenon. When replacing the door must pay attention to the inner and outer door panels in a new office painted folding plastic flange bite and put some punch hole left when the small craft with the base tape blocked.
When replacing the entire body, in addition to each of these projects should be completed outside, but also in the lap portion of the weld joints on both coated with sealant layer thickness should be about 1mm, and may not have virtual sticky layer , bubbles and other defects; should be at the Flap Flap special plastic coated; across the floor surface and the lower surface of the front cover should be coated 3mm-4mm elastic coatings and anti-corrosion coating; on the floor surface and the front elevation To paste the plate surface noise, heat, vibration damping film, then covered insulation blankets block, and finally covered with carpets or fitted with decorative flooring. These measures can greatly enhance the sealing and the vehicle speed slows down corrosion of the body, but also can greatly enhance comfort.
In changing the roof, the roof should be in place around the lamination coated conductive sealant, after a good to be welded seams in the water tank and folding over the painted plastic, which not only helps the body black cable ties, prevents the body due to more water to produce the weld flange early rust. Assembling the door when the door below the window paste an entire inner panel sealing barrier film, if not forming a seal barrier film, you can use ordinary plastic instead of paper, and then affix the seal spacer film compaction, and finally for trim panel assembly production

Spiral sealing technology development and its classification

Spiral Seal is a use of hydrodynamic radial anti lost non-contact shaft seal. Abroad from 1916 began to spiral centrifugal pump wire seals, and later successfully extended to many harsh conditions such as high temperature, cryogenic, corrosive particles and the liquid medium with seal. In recent decades, the domestic first nuclear-powered space devices and other cutting-edge technology in the field, as well as in high-speed centrifugal compressor successfully applied on the screw seal, and then in the general technical field of centrifugal pumps and other chemical acid solution was centrifuged sealed with a screw on the pump to get good results.

Spiral sealed into two categories:
One common screw seal, which is part of the shaft or the sealing surface of one of the holes turning the spiral groove;
Second spiral labyrinth seal, which is part of the shaft and the sealing surface of the pores, respectively turning the spiral groove in the opposite rotation.

Usually referred to as normal screw spiral metal seal seal. Spiral Labyrinth aka "composite spiral seal."

Resolution bearing the seal makes aluminum mill can not operate normally related factors

From aluminum ball bearing rolls in the assembly structure can be seen in its installed retaining lip plastic seal structure and after anti-scale, according to the actual theory, preferably in a sealed bearing in the case of the bearing lubrication is the ability to be safeguarded, but in the practical application of aluminum ball mill is there a big difference, relevant professional staff through a detailed analysis of this result is found to cause a certain reason:
1, the application of the bearing aluminum mill its poor working environment, the actual hot-strip mill at the operation, the bearings will be subjected to high temperatures, heavy and shock and many other conditions.
2, the bearing during operation of the high frequency removal work, finishing work for the bearing, since the amount of the roll and the bearing seat of conditions, each bearing to be repeated several times daily removal operation of the event to cleaning time period, thousands of times on the need for disassembly work, such an action would be nothing wrong with a certain impact on its tightness.
Aluminum mill in actual production, bearing the seal printed cable ties of the new pre-installed, which have varying degrees of bearing into the water, the latter in a sealed, water situation will be even more significant, is the bearing water has a very big influence. In the aluminum ball mill rotating at high speed, the bearing grease in the bearing and the inner pressure of the roll under the effect of the loss of cooling water, the number of mechanical impurities such as phosphorus oxide will be the roll cooling water into the bearing, the bearing roller promoter and are thus forming a raceway different levels of indentation. Ultimately the formation of pitting, and even fatigue spalling, if not promptly treated, can cause bearing accidents.

Soft sealing gate valve break through the traditional drawbacks

In recent years, many manufacturers developed soft sealing gate valve manufacturer, this wedge gate valves and traditional or parallel double plate valve compared with the following characteristics:
A soft black cable ties gate valve body, valve cover using precision casting casting, molding, machining did not, do not use sealed copper ring, saving non-ferrous metals;
2, soft sealing gate at the bottom no dents, no accumulation of slag material, valve opening and closing of the failure rate;
3, soft seal rubber lined valve plate size uniform and interchangeable.

So soft sealing gate valve will be the development direction of the water supply industry is reluctant to adopt a valve. Open and close the soft sealing valve, do not close off dead, as long as the sealing effect can be achieved, otherwise difficult to peel open or rubber lined. Water supply industry uses mostly soft numbered seals butterfly valve, butterfly valve in the installation process for the apron easily damaged sealing effect, many manufacturers have introduced metal sealing butterfly valve gasket sealing butterfly valve replaced. Metal sealing butterfly valve seals less flexibility because, generally eccentric structure, especially the use of three-dimensional eccentric structure is more reasonable.

Please pay attention fermentation equipment tightness

Ensure tightness fermenter

Fermentation fermenter is the main equipment. Prior to use, you need to carefully examine the fermenter, such as checking whether the abnormal rotation of its mixing system, mechanical security seals are tight tank screw is loose, the tank clogging pipes, laminated or tank coil leaks , as well as connecting the tank valves are tight and so on.

At present, the mechanical seal in the fermentation tank is widely used, which replaces the previous form of the stirring shaft seal strap packing, but if the mounting accuracy is not high or inappropriate use of the mechanical seal system, seal leakage may still occur, causing contamination. Therefore, the installation should pay attention to the stirring shaft alignment. It is understood that a fermentation plant in Xinjiang adjustable using intermediate bearing rod fixed by adjusting the position of the intermediate bearing to reduce the agitator shaft of the swing, and the use of multi-spring balanced mechanical seals, the use of different directions spring force offset part of the agitator shaft offset , effective implementation of the seal.

Improved cement kiln secondary seal structure

In the cement kiln production process, after the second transformation of the sealing structure, the rotor and the housing in order to avoid leakage caused due to fouling phenomena in the pipeline will be used on both sides of its entrance to the fan and the fan at the negative pressure within the portion of the cement rotary kiln fouling give away, this way, to achieve the effect is very visible.

After the second transformation of the cement rotary kiln used in the luggage seals sealing structure, the specific operation principle: fan-shaped plate and the circumferential ring to form a sealing cover, and in the same horizontal plane, and the smoke duct constituting a U-shaped sealing structure, fan Seal the plate and U-shaped duct and cigarettes to spaced.
In the cement rotary kiln calcination, its sealing cover four weeks there will be 12 spring device to adjust its gap in the sector where there will be 10 springs on the kiln rotor gap junction is adjusted so that hot end at zero gap remained at the cold end 5mm, after the cold end heat deformation is also maintained at zero gap. Regardless of the air preheater cement kiln in which the state is how, inside and outside the ring and the rotor radial partitions have been maintained at the same level, Plastic seal sealing the gap between the cover and the rotor are sealed by a spring and a U-shaped device to make adjustments, sealed lid to maintain its zero-gap contact and the close integration of movement can be achieved, in order to seal the results.

Doors and windows sealed resolve the classification and characteristics

At present China's building energy consumption Pat total social energy consumption of 27.5% in the terminal, strictly closed doors four weeks through gap energy loss typically accounts for 37-40% of building energy consumption. Therefore, improving the fan frame and the glass between the window frame and sash especially between the sealing performance is very important.
Currently seal market, mainly with modified PVC, vulcanized EPDM rubber (EPDM) and thermoplastic EPDM rubber (EPDM / PP) tape-based.
1 modified PVC strips
The price is relatively low, because of the quality of different strengths and weaknesses, the price usually 6,000 yuan 15,000 yuan / ton. Low-end products due to the use scrap, alternative plasticizers and high filler content to make the strip elasticity is poor, prone to hard, there assassination nose smell, easy to migrate the frame material yellow, life is short. Price competition in a few low-level doors and windows of businesses are still using. The high-end PVC strips can reach standard indicators, relatively long service life that the city has a considerable selection of doors and windows.
Because PVC products containing halogen, stabilizers containing heavy metals, it is not conducive to environmental protection, so in developed countries and domestic coastal cities of Beijing and Pat eliminate or limit the use of PVC strips. Currently the city there are also some companies began to upgrade using EPDM seal.
2 vulcanized EPDM rubber seal
In sealing elastic persistence than PVC strips have greatly strengthened, but due to the need of microwave curing line shape, machining high energy consumption, which is usually 20 times more than PVC processing, products can not be recycled, environmental damage, not the national advocacy products. In addition, the proportion of this type of product materials (1.4 and above) with PVC type quite (low vulcanized EPDM seals greater proportion) of the window with PVC strips similar rate, the use of relatively high cost, doors and windows are difficult to accept.
3 thermoplastic EPDM rubber waterproof labels
The seal is imported from abroad in recent years, independent research and development of technology and developed on the basis of a new material, mainly used for automobile doors and windows sealed, in recent years begun for the building doors and windows sealed. Its outstanding advantages are:
① performance and service life with vulcanized EPDM rubber security seal fairly.
② processing vulcanized EPDM strip with respect to energy consumption low (with PVC quite).
③ halogen and lead, heavy metals, plus a few years later recyclable, meet green building requirements.
④ proportion of small (only 0.9-0.95) the window is high. Purchase price seems high, the actual use of low cost.

Automotive sealing products in hot market

In recent years, the pace of development due to the automotive market, automotive cable sealing products, also will get a better development. Automotive industry, technology updates, and further stimulate the development of sealing products, technology, and constantly develop new products, and improve traditional technologies breakthroughs, which caused many companies to develop some new products, access to market new machine, made good gains.
On the other hand, due to the sealing industry has a new domestic technology continues to develop, and gradually break the monopoly of foreign technology, making the automotive sealing Security seals products are production costs, reduced a lot, we understand that some products due to the use of new technologies developed their own , saving 60% of the production costs. Meanwhile, the yield increase, the majority of companies in the market that have made record was success.

Market analysis gasket types

1 Asbestos combination washer: Asbestos rubber gasket made from high quality asbestos fiber, oil and fiber, fillers, coloring agents refined, widely used in petroleum, chemical industry, piping and equipment, according to the working conditions can choose the appropriate level models. Applications: Asbestos Gasket: mainly used for steam, water, gas, oil solvents and non-aggressive media seal.
(2) high pressure asbestos rubber sheet gasket: Asbestos rubber gasket to asbestos fibers, meter seals and rubber as the main raw material, supplemented by rubber compounding ingredients and fillers, after mixing, hot roll forming, curing processes is made. Asbestos rubber gaskets according to its formula, process performance and usage can be divided into ordinary asbestos rubber gasket and Asbestos rubber gasket. Depending on the temperature and pressure can be divided into low pressure asbestos rubber gasket, medium pressure and high pressure asbestos rubber gasket asbestos rubber gasket. For water, steam, oil, solvents, moderate acid, alkali sealing, asbestos gaskets are used in the low pressure in the sealing flange.
3 cylinder gasket: cylinder gasket made from high quality asbestos fibers, seals oil fiber, fillers, coloring agents refined, widely used in car motorcycle engine cylinder, according to the working conditions can choose the appropriate level of model.
4 Non-asbestos gasket: Non-asbestos gasket (non-asbestos gasket) is aramid fibers and organic fibers and plant nitrile rubber, inorganic minerals formed at high temperature rolling sealing material containing asbestos fibers as Few, applicable to non-asbestos gaskets asbestos gasket replacement product. Non-asbestos gasket (non-asbestos gasket) has both a high strength, but also has good elasticity, also has superior penetration resistance at high temperatures and pressures good environmental asbestos gasket materials.
5 Kevlar pads: Kevlar pads steam, organic solvents, acids, alkali, etc., are widely used in fluid transport device on the device used for pumps, valves, pipes, containers, etc. sealed. Composition and characteristics: high strength, high grinding capacity of aramid fiber as the main material and good lubricating composite material made of special security seals. This sealing product has excellent lubricity, wear resistance. The liquid in the liquid phase mixing device that can display its salient features.

Analysis Package Sealant Category

Sealing an important part of the packaging. Sealing security seal a direct impact on packaging effect, packing and storage life, and even affect the credibility of the packaging.

According to the shape and sealing materials used, can be broadly divided into three categories: gasket, sealing tape and colloidal seal. They can reach to prevent liquid leakage, blocking oxygen, moisture, odor-proof forgery, counterfeit products are intended. In particular, the security seal is booming in recent years, packaging sealing technology. It generally points to Cable tie hot melt pressure sensitive adhesive tape or sealant, packing can not be dismantled once the restitution, thereby preventing counterfeit products appear to protect the interests of consumers.

Summer storm car headlights Mifengbuyan now how to deal with fog

Question: Recently, the phenomenon of frequent rain, it finished the rain, the car's headlights interior is a fine mist of water; think of the car when a mist, use baking way to remove warm air,barrier seals I do not know whether it also applies to headlamps ?

Interpretation: As lights Mifengbuyan in cleaning and when it rains the water is likely to result, and when large temperature difference between inside and outside, when it will form a mist. This time is best not to carry high temperature baking, headlight plastic materials are generally qualitative, if the baking temperature is too high, it may cause the headlights look in softening deformation, affecting the use and appearance. In addition, the lights are generally monolithic, transparent lamp, plastic zip ties the lamp will stick with a protective body back, between the two will result in high-temperature baking gum melt adhesive, increasing the vehicle lights the possibility of water. In general, the moisture inside the headlights in the daytime sunlight can quickly evaporate. If your headlights frequent water phenomenon, it should go to the service station to check the lamp body, to see is not due to damage caused by the collision lights, resulting in frequent water.

Aluminum red mud seal pipeline put into operation

In recent years, Shan Zhou Road West station to the City Section dust pollution, become hot issues of concern for the environment. Starting in 2011, the city environmental protection, land, public security and other 14 departments joint law enforcement, pollution remediation efforts to improve environmental quality Shanzhou Avenue. After investigation, the dust pollution Shanzhou Avenue West Station area is mainly industrial enterprises spilled material omissions during transport, wherein the red mud Cayman Aluminum is one of important sources. Cayman Aluminum daily production of 1.4 million tons of red mud, the annual generating capacity of 5.11 million tons of red mud, all using tankers to transport more than 10 kilometers outside the red mud libraries. Since red mud easily missed during transport shed, fell pavement formation of fine white powder after drying, it is difficult to clean, thereby causing serious dust pollution.
In order to complete remediation of the Cayman Aluminum red mud pollution, Municipal Environmental Protection Bureau ordered the company rectification, and actively help enterprises choose governance process to finalize the stockpiling of dry red mud and pipe cable sealing transportation engineering to solve pollution problems in the red mud. It is reported that the company first red mud pollution remediation projects using red mud dry stacking technology, by improving the process to reduce the water content of red mud, red mud effectively reduce total emissions. Meanwhile, in the West Shan County Library red mud tank trench construction, including a project for a total capacity 20.262 million cubic meters. Then, laying red mud pipeline 13 kilometers pipeline through 209 National Road, Zhengzhou-Xi'an high-speed railway, the Longhai Railway, culverts, slopes and other extreme terrain to reach the red mud libraries. Currently, the Cayman Aluminum produced more than 10,000 tons per day of red mud have been transported by pipeline sealing, complete elimination of the tanker transporting red mud pollution Shanzhou Avenue.
Recently, a total investment of 120 million yuan of red mud seal tamper evident tape Cayman Aluminum pipeline was built and put into operation, which ended with the company for many years trucked red mud of history, complete elimination of the transport process red mud spilled omissions Shanzhou Avenue pollution.

How to solve the problem stripping rubber seals

Rubber seals classified many, EPDM automobile security seals, fluorine rubber type seals, nitrile rubber. At present, many manufacturers of products qualified rate, the product can not meet the requirements luster, but also add an additional step to make the product surface coating layer of matte. In fact, these are available through improving the effectiveness of the release agent to improve.
EPDM car seal spray cans can be used semi-permanent release agent, such as 820-NC, spray once with a class, the product release effect is good, different grades of products can also improve gloss and matt effect. Another tool used multiple times, if dirty, you can use HD-303 mold cleaning water, not offline, can effectively improve the production efficiency;
Fluorine rubber tamper seals, iron and fluorine rubber composite products due to the metal skeleton, stripping more difficult, defective rate is relatively high, if using silicone products, rubber skeleton and fluorine binding force will be affected, which is required for semi-permanent removal mold release agents HD-820, product handling time, multiple stripping, does not affect the adhesion of rubber and skeleton.

Spacecraft cabin seals seamless anti-radiation

Small cross-sectional size of the largest one seal but a few centimeters, but used in the "seven gods" but manned space systems play a big responsibility. Seals to ensure spacecraft cabin space suits and good air tightness, in order to protect astronauts normal pressure environment and safety.
Since 1999, successive "Shenzhou" spacecraft cabin dozen sets, thousand pieces the size of the seal are four homes forty-two aerospace development and production, product inspection pass rate last post was 100%. And the "seven gods" extravehicular clothing has a special purpose such seals rubber parts, on a total of nearly 50 kinds of specifications, thousands of products.
Spaceship spacecraft cabin cabin marker cable ties are a key component of the sealing structure plays a spaceship in outer space isolation, supporting the safety of astronauts independent living environment an important role in the United States "Challenger" is because a small transmitter gasket problems and failure. Since the complex environment of outer space, requiring high vacuum seals, -50 ℃ to 200 ℃ alternating high and low temperature, UV radiation, charged particle irradiation and the use of atomic oxygen and other special circumstances, no degradation, aging and cracking, and always maintain a reliable sealing performance.
Chinese astronauts wearing spacesuits made their extravehicular activities, is the "seven gods" flying the biggest bright spot. Aerospace four homes bear this much people and the world attention Spacesuit rubber products development and production. EVA suits rubber products in addition to seamless, with radiation, anti-UV, cold and hot temperatures and other functions, their safety, reliability and design life and other demanding. Which is the product of the rubber Cable tiefollowing the spacecraft manned spaceflight after another application fields.

Seal design, installation

Design
In the use of high-quality seals, while many customers in order to reduce costs, part of the guide and dust chose lower grade products, resulting in the swing because of the cylinder rod seal damage or foreign debris leakage asked to mention, please We consult the relevant product, in order to avoid wasting a quality seal situation.
Installation
When installing seals most important issues is to avoid causing damage to seals, in addition to a suitable finish, safe chamfering, deburring, and appropriate tools, the installation on the way how to avoid falling dust floating Bolt sealsurfaces, when How to win the title as the piston is installed properly placed to avoid crushing seals, clean hydraulic media, if the user have any questions, we can provide clear and simple I seal the factory installation instructions.
Use
A lot of time supporting users after the completion process, even if the device has passed the test, sent to the user after a period of time there will still be problems, under normal circumstances, it may be caused by improper use, for example, cause the plastic truck seals to burn oil temperature is too high, You can check the cooling system is operating properly, rod surface wear and leaks, you can check whether there is any debris hydraulic oil, filter is invalid. Seen from the above mentioned situations, even if users are willing to pay a higher price purchase quality seals, but also in all respects to be controlled and monitored in order to protect the investment will not be wasted to pay, choose a professional production house, to establish long-term cooperation partner, very necessary.

In the application of the gas mixer seals

On the mixer using a gas seal for the user has three main advantages:
No liquid leakage; no effect on product quality; little effect on the reaction or no effect; such a sealing member also has some other advantages. Include: Operation Clean (GMP); friction loss low; does not happen noise; mechanical wear little or no wear.
If the seal system used in the mixer for the above requirements, then such seal member is operable. The main purpose of the current mixer, what is it (low speed)?
DIN mixer for compliance with requirements in DIN steel container seals; DIN mixer used with DIN-compliant seal enamel containers; used for disinfection purposes mixer; vertical suction filter / drier; special purpose (on the product for horizontal installation). Pressure uses, such a sealing member is usually used in vacuum conditions, up to 6bar.
In the past 10 years, since the wire seals  was first introduced low-speed applications, it has been made a lot of experience. Especially when the user is in the learning phase, has made a number of important insights. Mechanical seals according to the user as part of the liquid lubrication 40 years experience in the use of seals has been made very clear differences and application restrictions should still be recognized and given requirements. Used in the past is not a liquid seal for each product gas seals. The main factor to consider is the product has a high sensitivity (for example, the sealing surface is touched.) To counteract this effect, many types of research and the use of additional components, such as the patented flush mounting flange. When the sealing surface of the automatic alignment feature degradation when converted into their own gas consumption, the sealing surface is blown or is rinse. The mounting flange can be used for washing steel container, especially for the enamel container (plastic container). Apart from the gas seal applications beyond the experience gained in the storage and use has also made a series of new insights. When the plastic seals member to achieve its first time of change, and start using the ship between the seal member, may be after many years. Same time, various factors can influence the characteristics of the gas seal member. In the assembly accidentally add too much grease or oil - grease or oil into or penetrate into the sealing gap. Then, in use, a clearance resulting imbalance seal damage. Based on its past experience, the seals at its beginning before use, it should be checked. If the storage period is too long, the aging effect can also occur on synthetic rubber.

Whether choosing cheaper seals

Now, many plant construction projects do 'mess'. To cut costs, the plant will pump and seals seen as some of the worst culprits. But in the long run point of view, if, because of this pressure and buy cheap meter seals, will give the company's operations caused counterproductive consequences, leading them to the market in today's world have lost the ability to compete.
Can be sure that now possess superior economic conditions, and therefore do not have to buy the cheapest product is not available, Page Mr. attempt to prove this. He said the key is to plant managers and accountants must be unanimous. His advisers from industry experts Paul Barringer get a revelation. For a long time, the expert has insisted that: a shift in order to make a case, the engineer must take the numbers and the net present value (NPV) to speak.
If a device, not due to failure of the seal, but for some reason, and need frequent maintenance of the case, then the choice of the short-lived seal member may be a valid option. But Mr. Page said: "If the seal life as a limiting factor, then the choice may be more reliable seals, of course, prices may also be higher."
However, there is a higher investment option, in the long run the cost of having to spend a very high, which is sealless pump. In the life-cycle cost estimate table is also related to this problem. Mr. Page said, unsealed pump will cause transmission losses, so the energy efficiency significantly lower than the average pump. But also as an ordinary pump as often need to send production plant repair, maintenance and inventory costs therefore always relatively high fees.
A final note is: Only when the seal reaches its desired performance, life cycle cost calculations to accurate, this means that high security seal must be installed correctly to operate correctly. Mr. Page said that modern barrel-type mechanical seal is easy to install, place accurate, but improper operation will still cause damage. For example, he said: "a large double pump, especially its hot runner, the need to have a few hours before the start of the warm-up company if the removal of the fillet, is bound to shorten the life of the seal."

Hydraulic oil pollution storage of such knowledge

Hydraulic oil pollution on the one hand ceramics factory ceramic powder, dust particles and water droplets in different ways and from different sources to invade the hydraulic system, hydraulic pumps and hydraulic valves, etc. On the other hand normal wear debris generated after etc. will also accelerate the hydraulic oil contamination. And contains solid particle contamination of the hydraulic oil is similar to metal parts machined surface grinding abrasives, ceramics factories common cause premature wear of hydraulic tamper evident seal and reduce its seal.
Hydraulic seal storage and safekeeping ceramics factory used hydraulic seal storage and safekeeping, should make the hydraulic seal in a sealed Teflon and other moisture-proof plastic bag, and make such record date of the deposit, and then kept in the shadows avoid heat or direct sunlight and other storage improper care and reduce its sealing performance.
Selection of hydraulic seals hydraulic seals ceramic factories commonly use, you must first understand the ceramics factory hydraulic equipment performance, work pressure, oil temperature, hydraulic oil and the working medium velocity size and other environmental conditions, but also must understand Ceramics Factory common hydraulic seal of the structure, sealing characteristics, price and performance of the sealing material, to ensure that seals, sealing surfaces, the quality of design and manufacture of the seal groove and bolt security seal assembly quality, and enhance the hydraulic oil pollution and protection awareness, to strengthen the Hydraulic oil pollution supervision and inspection work, hydraulic oil pollution should be replaced, and make ceramics factory used hydraulic seal storage and preservation work. Accordingly comprehensive analysis and comparison, from selection of appropriate materials and appropriate structural forms of commonly used hydraulic seals.

Mechanical seals have any common sense

Seal selection, working conditions must be considered to select the appropriate form of seals and materials, installation structure.
Need to consider working conditions generally include: temperature, pressure, media. Others also need to combine the characteristics of the device itself to consider the selection.
About the temperature, such as NBR material Operating temperature range is generally -40 ~ +120 ℃. It is necessary to consider beyond 120 ℃ FKM, and even the PTFE material. Low temperatures are relatively rare, in general the -20 ~ -40 ℃ in case you want to consider the use of cold NBR, NBR material generally will result in a low temperature environment material hardens, resulting in leakage, such as railway locomotives in the northern winter was often such problems.
As pressure, the impact to be used in the form of a high security bolt seals. Generally, low-pressure and medium pressure use rubber or PU seals will not be much problem. But to be considered a shock pressure problems, such as construction machinery startup, shut down when its impact is much larger than the normal working pressure of the pressure, it will often use pressure up 70MPA impact resistance to collapse or SPGW do the main gap HBY cable seals. PTFE seal combination is also commonly a choice.
Media with a relatively simple. Just need some special attention to small problems, such as metallurgical industry, often using a water tank - glycol and phosphate ester hydraulic oil. Although sometimes working temperature is not high, but still have to be very careful selection of materials, hydraulic oil when the latter still have to use FKM.

Non-contact gas lubricated mechanical seals use

Blender does not contact with the gas lubricated mechanical security seals (low speed) sold in the market, there are already more than 10 years. In the past 10 years, has made a series of experiences. This paper summarizes a number of important insights. When used correctly in the appropriate purposes, the mixer gas seal can help the user to improve quality and increase product purity.
When discussing the mechanical seal, the most important thing is to figure out the differences between various sealing systems. Mechanical seals are three basic types: fluid lubricated mechanical seals, gas lubricated mechanical seals and touch off style or called non-contact gas lubricated mechanical seals.
These types of mechanical seals difference is in the fluid-lubricated sliding surface of the seal between the fluids. These bolt seal are usually applied mixed friction purpose mixer. For dry running seals, two sliding surfaces in direct contact with each other. On the other hand, does not contact the gas-lubricated mechanical seals, in the operation of the sliding surface is not in direct contact. There are 1 ~ 5μm wide gap separating the surface, which is why this is often referred to as the seal seals from seal causes. When referred to the gas damping double seals should have this distinction. Here we will discuss only non-contact gas lubricated mechanical gas seals.

Pneumatic butterfly valves powder system

A control valve for solid materials, often in the bottom of the tank as a discharge valve to be used, such as cement cans, powder cans bottom of the tank to discharge and rapid cutting. Because dust material containing mostly large or small particles on the valve sealing surface wear is beyond doubt, improper selection, will greatly reduce the life of the valve, or will soon cause valve leakage, affecting continued use. Batch weighing system, the entire batching process with PLC automatic control, and the ingredients used car is the discharge valve pneumatic butterfly valve, the medium is a very fine powder particles. After a period of time, valve leakage, resulting in piles of earth leakage regularly powder on the table, because this medium is very thin, and somewhat sticky, although the ingredients with a small vibrating motor car, and finally there are many materials attached to the tank parts of the walls and valves, the valve is closed, the card around the sealing surface of the valve is not fully closed, resulting in re-installation material leak occurred after the passage of time, but also so that the sealing surface wear is very powerful, and even emerged trenches . In the PLC program, the motor vibration prolonged shock out as far as possible all the material before shut-off valve; Zero the weighing instrument alignment, all materials will be out after the show zero, then close the valve was issued by the PLC signal; would replace three eccentric butterfly valve double eccentric resilient Plastic seal butterfly (midline sealing rubber valve can also be used, taking into account the material in the occasional large particles, the rubber seals may not be durable - if there is no fine powder particles can be Consider using a soft seal butterfly valve), because three eccentric butterfly valve seat sealing surface is an inclined, that is, face seal, so the material is easy to accumulate on sealing surfaces, can not quickly discharged, while the single eccentric or double eccentric butterfly valve would not have this drawbacks, even if the sealing surface is a little material, but also when the valve is closed by the valve plate scraped off, and thus ensure a good seal, and the Security seals surface durability.
Pneumatic butterfly powder system, there are other factors that need to be considered, such as: can not let the material into a small car from above the valve when the valve plate rushed directly (this impact also make valve can not close tightly), and the material static pressure also need not exceed the design bearing pressure pneumatic butterfly valve, and so on. Manual valves control valves with common difference is, you can not take it as an isolated element to look at, but it must be part of the system as a whole to consider the self-control, control valves used in many of the problems, not the selection and configuration problem, but because the user's lack of knowledge of the control valve control valve failed resulting control system commissioning, with the good. Recognizing a problem as long as the key, the correct selection of the valve, and in the commissioning phase of the control valve system debugging, we must, can greatly reduce the failure rate, so that long-term stable operation of the automatic control system.

Mechanical seal selection method

Mechanical seals are precision, structure is more complex mechanical component of the foundation, a variety of pumps, reaction synthesis reactor, turbine compressor, submersible motors and other key components of the device. Its sealing performance and service life depends on many factors, such as selection, the accuracy of the machine, the correct use of the installation.
Mechanical seal selection method:
Mechanical seal according to the working conditions and the different nature of the media, with high temperature, low temperature mechanical seals, high pressure, corrosion-resistant mechanical security seals, mechanical seals and resistance to particulate media to adapt easily vaporized light hydrocarbon medium, mechanical seals, etc., should be based on different usefulness select a different structural types and materials of the mechanical seal.
Selection of the main parameters are: seal chamber pressure (MPa), fluid temperature (℃), working speed (m / s), the sealing properties of the fluid and the effective installation space.
Mechanical seal selection of the basic principles are:
1 according to the meter seal chamber pressure to determine the sealing structure using balanced or unbalanced, single face or double and so on.
(2) according to the working speed, determine the use of rotary or static, hydrodynamic or non-contact type.
3 according to the temperature and fluid properties, determine the friction and auxiliary sealing materials, as well as the right choice lubrication, washing, heat, cooling, mechanical seal cycle protection systems.
4 According to the sealed space efficient installation, determine the use of multi-or single spring or springs wave springs, built-in or externally mounted.

The structural characteristics of hydraulic seals decide his performance characteristics

Hydraulic seals are mainly O-ring, round and square ring seals, etc., in such a form that they have a simple structure, easy to manufacture, low cost, so they are widely used in hydraulic system dynamic sealing element and static sealing elements. Because of the structural characteristics of this makes their performance characteristics.
1 easy to leakage of liquid substance inside, has a good seal strap, even at high pressure and high temperature and other harsh environments, the amount of leakage of hydraulic seals and no significant increase.
2 has good compatibility. Hydraulic seals due to long-term immersion in hydraulic oil, easy to swell, dissolve or brittle hardened, so that the loss of the seal, thus requiring the hydraulic plastic seals of the hydraulic oil has a good compatibility.
3 has the advantage of low friction. In order to avoid or reduce the hydraulic equipment producing low crawling and other undesirable phenomena, requiring hydraulic seals with low static friction and dynamic friction, and the friction coefficient should be very stable.

The new product structure

In recent years, as people on the importance of sealing technology, the new sealing structure emerging, on a technical level, the level of quality, cost and other aspects to meet the domestic market demand and the international market.
1, the new seal: This seal is equipped with a test truck seal (rotating seal) disclose the amount of sensors that can be used online leak detection equipment by Simrit exclusive launch;
2, Evd sealing system: cylinder seal wear and deformation, through a special device to regulate the seals (elastomer) internal pressure to eliminate leakage, very high reliability requirements for the equipment (such as servo cylinders, water tanks) . Hunger launched by the company;
3, using the new seal SETCO AirShieldTM integrated spindle friction sealing and advantages of labyrinth seals. Compressed air tangentially into the fixed front bearing cycle trough, and the spindle together constitute a closed maze. Air flow in the tank around the spindle. Games like vortices produce a uniform pressure to a uniform distribution of air flow. Combined with a flexible sealing lip, dirt will leak air from the spindle, the bearings mainly blown;
4, the structure of innovation PTFE seals: PTFE seals spawned many new structures, used in reciprocating seals, rotary Cable tie, static seals, such as AQ seal, PTFE-V-ring sealing systems such as the Pan-Cypriot seal with the main seal.

Applied in the mixer without touching gas lubricated mechanical seals

The gas in the mixer using the non-contact type mechanical seal for the user has three major advantages: 1, no liquid leakage; 2, the product quality is not affected; 3, on the reaction with little or no effect;
Non-contact type mechanical seal also has some other advantages. Include: 1, the operation clean (GMP); 2, low friction loss; 3, the noise does not occur; 4, mechanical wear little or no wear. If the seal system used in the mixer for the above requirements, then such seal member is operable.
Pressure purposes, without contacting mechanical security seals are usually used in vacuum conditions, up to 6bar.
Mechanical seal according to the user part of the liquid lubricated numbered security seals for many years experience in the use of liquid seal is not used in the past for each of the products are suitable for gas seals. The main factors to consider for sealing products with high sensitivity (eg, sealing surface is touched). To counteract this effect, many types of research and the use of additional components, such as the patented flush mounting flange. When not contact mechanical seal sealing surface when the automatic alignment feature degradation, self-converted to gas consumption, the sealing surface is blown or is rinse. The mounting flange can be used for washing steel container, especially for the enamel container (plastic container). Apart from the gas seal applications beyond the experience gained in the storage and use has also made a series of new insights. When the seal member to achieve its first time of change, and start using the ship between the seal member, may be after many years. Same time, various factors can influence the characteristics of the gas seal member. In the assembly accidentally add too much grease or oil - grease or oil into or penetrate into the sealing gap. Then, in use, thereby causing uneven gap, mechanical seal damage. According to experience mechanical seal at its beginning before use should be checked.

Common resin sealing material

Commonly used in the resin sealing tamper seals material is polytetrafluoroethylene, phenolic resin, polyamide resin and the like.
1, PTFE Teflon is a polymer, is the world is the best corrosion resistance of the material, known as "plastics king" reputation. It can in any chemical medium and long-term use, it produces solve our country's chemical, petroleum, pharmaceutical and other fields of many problems.
2, the phenolic resin is a phenol and formaldehyde in proportion to the ratio of the polymerization catalyst. It has good mechanical properties, heat resistance, the disadvantage is brittle, poor workability.
3, commonly known as nylon polyamide, by polycondensation of dicarboxylic acids and diamines made or is made from the amino acid dehydration polymerization of caprolactam again. It is high strength and good toughness,security seals wear-resistant and self-lubricating excellent. Disadvantage is impatience acids, alkalis and phenolic substances.

Industrial manufacturing decision seal industry development potential

With the rapid development of China's machinery industry, especially the automotive industry and the development of the electronic communications sector, China seal industry already has an irreplaceable practical significance and far-reaching development of the industry connotation.
Free high-temperature silicone gasket sealant, one-component, using international advanced production technology sealant and imported materials production, has a higher sealing performance and heat resistance, and can replace a variety of rubber pads, asbestos mat, cork mat and a pad of paper, flexible film, sealing caulk ability, does not stimulate the release of gas is environmentally friendly products for the automotive, motorcycle (engine) of various electrical and mechanical equipment, flat flange, with surface cover, etc. tie wraps, which according mechanical internal components of the body, is applied directly to achieve sealing and bonding, eliminating the hassle of making a variety of gaskets.
Industry, who tend to believe that seal is a small thing, but it is a sealed continuous operation is very important for industrial technology products. Reform and opening up, because of lack of attention, seal industry has long been considered a small but complex areas, development is slow, a lot of small businesses can not form a production and quality management. With domestic manufacturing level, this situation has begun to change rapidly.
With the rapid development of China's machinery industry, especially the automotive industry and the development of the electronic communications sector, China seal industry already has an irreplaceable practical significance and far-reaching development of the industry connotation.
In the new international environment, global cable seal products manufacturing base will continue to transfer to China. China seal industry will usher in a period of development by leaps and bounds, and will also Chinese new industrialization development and make greater contributions.

Since the tight rubber seal skeleton Installation Considerations

(1) Install oil seal, it shall be checked whether the journal surface is too rough, with or without injuries, especially without a long scar along the axial direction. If the journal surface is too rough, can easily damage the oil seal lip 1:3 or accelerated wear, damage its sealing performance. If the journal surface due to improper disassembly bludgeoning more serious injuries, oil seal lip will fit with the journal surface lax, resulting in oil leakage. In both cases, the Ministry of injuries can re-surfacing according to the provisions of the journal size lathe round, or replace the new axis. If the journal only metal burrs or burr shaft, etc., can be flat grinding rasp to prevent injuries when installing oil seal oil seal lip.
(2) Check the oil seal lip without breaking, cracking or oil corrosion damage, if any, of these negative phenomena, should be replaced with new oil seal.
(3) Install oil seal, to prevent oil security cable ties lip 121 is tensile deformation or scratch damage, to adopt special tools for installation. Without this tool can be installed dismount: first shaft portion even in the journal, the volume of the hard layer of transparent plastic film (commonly known as cellophane), cast on its surface a little oil, the oil into the wrapped plastic envelope film first axis, uniform force the seal slowly pushed to the journal, and then pull out the plastic film. Note: Do not put lip installed the wrong direction and should be made toward the inside of the oil being stored, a trademark, specifications side facing outward. Because only one-way sealing lip 1:3, if anti-oil package, will inevitably result in oil leakage, seal weakened or lapsed. To avoid the oil encapsulated crooked or stick with a hammer and other tools in the seal surface Luanqiao hard, or easy to make seals cause injury is.
(4) During the installation process, should maintain metal seal (especially the lip area) and the journal area clean, and pay attention not to spring out from the tight seal springs outside the tank. If the self-tightening spring relaxation, stretch weakened, depending on the circumstances of its period cut down securely connected to both ends of the head can continue to use.