Method for improving service life of regulating valve

Growth of the throttle channel is the most simple thickening of the seat, so that the valve seat hole growth, the formation of a longer throttle channel. On the one hand enable the flow of closed type throttle after the sudden expansion delayed, from the transfer of the failure location, away from the sealing surface of the effect; on the other hand, and increase the throttle resistance, reduce the degree of pressure recovery, so as to reduce cavitation. Some of the valve seat hole is designed into the step type, wave type, is to increase the resistance, weaken cavitation. This method in the introduction of the device in the high pressure valve and the old valve is often used to improve, but also very effective.

Open type flow toward the opening direction of flow, cavitation, erosion a major role in the sealing surface, the roots spool and spool valve seat sealing surface damage quickly; the closed type flow toward the close direction flow, cavitation, erosion of the role in the throttle, the valve seat sealing surface below, the protection of the valve sealing surface and the root, and prolongs the service life. Pretending to be away and use the valve type, while extending the life issue is more prominent, just change the flow of life can be extended 1 to 2 times.

For the anti cavitation (damage, such as shape of honeycomb dots) and erosion (streamlined minor groove) can be replaced by special material of cavitation and erosion resistant to create cutting pieces. This special material is 6YC - 1, A4 steel, hard alloy, starry knight. For corrosion resistance, can be used to more corrosion-resistant, and has a certain mechanical properties, physical properties of the material. The material of non-metallic materials (such as rubber, PTFE, ceramics, etc.) and metal materials (such as Monel, Hastelloy, etc.).