Gate Valves are normally the gate open or fully closed. Not as regulating or throttling. For high-speed flow in the media, the gate open condition can cause local vibration, and the gate vibration and may damage and seat disc sealing and throttling will suffer the erosion media wedge.
Domestic low-pressure valve is widely used in cast iron, cast iron gate valve, gate DongLie often occur in such serious problems, off the carbon iron gate valve stem rust easily, packing and gasket, leakage of poor quality. The PN1.0 valve production of low carbon steel gate MPa replaced traditional iron gate valve, effectively solved the iron gate to gate DongLie, shell yi yi, stem rust, sealed performance is not reliable, etc.

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