Work requirements for seals inventory

1 hardening (aging ) - One seal leak because its temperature material is hardened , when the hardness is too high ,pull tight plastic seals the sealing member can not be filled and with a gap between the parts , it will leak .
(2) Wear - wear of the seal surface of the part involved with the finish , velocity and transmission media , different sealing materials, adapted to different velocity .
3 Extrusion - when the seal to put too much pressure will be squeezed into the metal gap , damaged seals and cause leakage , this situation involves seals of their hardness and metal gap is too large, if in the design , selection , processed or handled properly installed , there will be out of damage.
4 Corrosion - the situation is manifested seals soften even dissolve , because seals invaded by the media , the choice of material error. If the aqueous or solvent media paying particular attention.
5 General seal according to the temperature ,strap seals velocity , pressure, and material can be used for the following simple classification ( for reference only ) : Temperature ratings apply material velocity pressure levels for materials for materials 110 ℃ nitrile rubber / PU 0.5 M / S nitrile rubber 200kg / cm2 with the hardness and design 200 ℃ Viton 0.6 M / S PU 400kg / cm2 with the hardness and design 260 ℃ PTFE 14 M / S PTFE 700kg / cm2 with the hardness and design more about "Hydraulic seals "