Extraction non-return valve characteristics and structural advantage

Extraction non-return valve is the role of not only manifests in an industry, many industries can use it. Play a role in protection of steam turbine generator set, because the generator in the process of operation will be a lot of danger happening, such as reduced pressure suddenly in steam turbine load rejection. A, extraction non-return valve product characteristics 1, sealing surface surfacing Cr13 stainless steel or cobalt-based hard alloy, have good wear resistance, stable and reliable sealing performance. 2, heavy hammer through extension rod and fork on the pin shaft, used to balance and rocker heavy torque and prevent the occurrence of water hammer. When the medium flows forward, help to open the valve, and keep the valve in the running smoothly and reducing vibration. 3, when the medium is flow, cylinder inferior vena intake, together with a heavy hammer, balance disc is located in the full open position. When the reverse flow of the medium, the cylinder piston inferior vena rapid pressure release, the disc at 0. 5 seconds down quickly. Second, the extraction non-return valve structure advantage 1. Is spring return type actuator cylinder or hydraulic cylinder, with a relatively independent, the valve closed and actuator failure does not affect the closing action. 2. Extraction non-return valve manufacturer to introduce the seat sealing surface inclination Angle, reduce shut down time, lighten the impact, protect the security of the equipment itself and the pipe. Valve plate with large Angle, shorten the open shutoff stroke, gas to help achieve rapid opening and closing, three-dimensional eccentric sealing structure, open the seal or separation, close contact with the sealing, lightweight flexible opening and closing. Valve plate by closing thrust, achieve the goal of the globe, check. Quick closing time can reach 0. 5 ~ 1 second, emergency cut-off safe and reliable.