When purchasing mechanical seals, several ways to check products

When purchasing mechanical seals, there are several major ways to check the products. As consumers will check the quality of the products on the spot, the seal factory seems to have a lot of knowledge to check the products, which determines the longevity of the products. number. The inspection of mechanical products requires more caution. If the initial inspection method is not appropriate, the products will show various shortcomings. The following is how consumers can check the quality of the seal. 1. The overall inspection of the mechanical seal 1. There is no impurities inside the mechanical seal. Before assembling the mechanical seal, thoroughly clean the moving ring, static ring, shaft sleeve and other parts. 2. Check whether there are defects such as scratches and cracks on the surface of the dynamic ring. The existence of these shortcomings will cause severe leakage of the mechanical seal. If possible, you can use special tools to check whether the sealing surface is flat or not. The pressure water will enter the dynamic ring sealing surface of the mechanical seal after assembly. The dynamic pump is separated by the mechanical seal ring, and the mechanical seal fails. If necessary, we can manufacture the tooling before assembling the water pressure test. 3. Check whether the dynamic ring seat has shortcomings that affect the seal. For example, does the dynamic ring seat and the dynamic ring seal ring have any shortcomings? 4. Check whether the mechanical seal compensation spring is damaged or deformed, and whether the tenacious coefficient has changed. 5. Check whether the seal sleeve has shortcomings such as burrs and groove marks. 6. Clean and check whether there are cracks, pores and other shortcomings in all sealing rubber rings, and measure whether the diameter of the rubber ring is within the tolerance range. 7. For mechanical seals with pumping tissues, check whether the spiral line of the screw pump has defects such as cracks and broken wires. 8. Check the gap between the dynamic ring and the shaft or sleeve. The inner diameter of the static ring is usually 1~2mm larger than the shaft diameter. For the dynamic ring, in order to ensure floatability, the inner diameter is 0.5~1mm larger than the shaft diameter to compensate for shaft vibration. It is skewed, but the gap should not be too large, otherwise the moving ring sealing ring will be stuck in and the mechanical sealing function will be damaged. 2. Check the shaft sleeve. Check the rust and wear after removing the shaft sleeve. If the rust or wear is relatively subtle, you can use fine sandpaper to polish it. If the rust or wear is severe, you can use electroplating after processing or replace it. New bushing. 3. Sealing ring After a period of use, the sealing ring loses its elasticity or ages in most cases, and usually needs to be replaced with a new ring. Fourth, the tension spring 1. If the tension spring is not severely corroded and can maintain the original elasticity, it can not be replaced. If the contrast of rust is severe or the elasticity is much reduced, a new tension spring needs to be replaced. 2. After the mechanical seal is revised, it will be assembled from the beginning, and the pressure test will be carried out after assembling, and then put into normal operation. 3. For mechanical seals with assembled boxes, clean the boxes and check whether the grooves are worn or deformed, so that they can be corrected and re-grooved or replaced. Keywords: seal factory, mechanical seal factory, pump mechanical seal