Mechanical seal assembly technology dimension checking

1) Measurement of the size of the static ring sealing surface. This data is used to verify the static ring radial width, was elected with different friction materials, hard materials should be higher than the radial width of the friction surface soft big 1 ~ 3mm, otherwise easily lead to hard material embedded in soft material edges face the end go up.
2) Check the static ring and the shaft or sleeve of the gap, the stationary ring bigger than the shaft diameter generally 1 ~ 2mm, the ring, in order to ensure the volatility, the internal diameter than the shaft large 0.5 ~ 1mm, to compensate for shaft vibration and skewed, but the gap is not too large, otherwise it would snap ring seals and cause damage to the mechanical seal performance.
3) check the mechanical seal tight force. We usually talk about the mechanical seal tight end than the pressure force that is, face to the right than the pressure is too large, mechanical bolt security seals friction surface heating will accelerate the face wear, increased friction power; too small, easy to leak. Face than the pressure is determined when the mechanical seal design, we can only rely upon assembly clamping force measurement to determine the mechanical seal. Typically the measurement measuring method stationary ring mounted to the vertical distance gland face, and then measuring the gland ring end face to the vertical distance from the difference between the clamping force is the mechanical seal.
4) whether the length measurement compensation spring is changed. Spring changes will directly affect the performance of mechanical seal face pressure ratio. Under normal circumstances the length of the spring in the long run will be shortened to compensate for spring mechanical seal ring on the reasons but also because of the centrifugal force and deformation.
5) measuring static ring anti-rotation pin sub pin hole depth and length to prevent excessive static ring pin can not be assembled in place. This situation will damage the mechanical security seals.