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In order to ensure that stainless steel multistage centrifugal pump assembled mechanical seal leak-free, stainless steel multistage centrifugal pump tightness inspection is essential, but the inspection process is more complicated, the following will be given more detailed method of operation:
　　
1, measuring the length of anti-static pins and pin hole depth to prevent the pin is too long static ring can not be assembled in place. This condition can damage the mechanical seal.
　　
2, check the moving ring, stationary ring and the shaft or sleeve gap, the static diameter of the ring is generally larger than the shaft diameter 1-2mm, for moving ring, in order to ensure the floating, the diameter larger than the shaft diameter 0.5-1mm, to compensate Shaft vibration and deflection, but the gap can not be too large, otherwise it will move the ring ring stuck into the mechanical seal caused by damage.
　　
3, measuring moving ring, stationary ring sealing surface size. This data is used to verify the radial width of the static and dynamic rings. When using different friction materials, the radial width of the friction surface of the hard material should be 1-3mm larger than the soft one. Otherwise, the corner of the hard material end face may easily be embedded in the soft material Face up.
　　
4, measuring the length of the compensation spring changes. Changes in spring performance will directly affect the mechanical seal face than the pressure. Under normal circumstances, the length of the spring will be shortened after a long period of operation, and the mechanical seal of the compensating spring on the moving ring will be deformed due to the centrifugal force.
　　
5, stainless steel multi-stage centrifugal pump mechanical seal check. We usually talk about the mechanical seal is the end pressure, end pressure than the appropriate, too large, the mechanical seal friction surface will heat to accelerate the wear of the end surface, increase the friction power; too small, easy to leak. End face specific pressure is determined at the mechanical seal design, we can only rely on the measurement of mechanical seal tightness to determine assembly. The usual measurement method is to measure the vertical distance from the installed static ring end surface to the gland end surface and the vertical distance between the end surface of the moving ring and the gland end surface. The difference between the two is the mechanical seal force.
Stainless steel multistage centrifugal pump sealing test
Stainless steel multistage centrifugal pump is mainly used for conveying water and physical and chemical properties similar to the liquid water. Its biggest advantage is the hydraulic model of advanced design, high efficiency, high energy saving. Pump internal impeller, pump housing and its main components using stainless steel stamping forming, the flow channel is particularly smooth, bushings, bushings with carbide, with superior service life, to avoid secondary pollution. The maximum temperature of the liquid does not exceed 80 ℃, is widely used in mine drainage, factories and urban water supply purposes.