Structural Characteristics of Gate Valve

Structural characteristics of gate valve

Gate valve has the characteristics of small fluid resistance, applicable pressure and temperature range, etc. It is one of the most commonly used cut-off valves, used to cut off or connect the medium in the pipeline. The shrinkage of the diameter can reduce the size of the parts, reduce the force required for opening and closing, and expand the application range of the parts. But after the diameter shrinks. The fluid resistance loss increases. Low-pressure gate valves in China generally use cast iron materials. Cast iron gate valves often have serious problems such as freezing and cracking of the valve body and falling off of the gate. The carbon steel stem of the cast iron gate valve is easy to rust, the quality of the packing gasket is poor, and the internal and external leakage is serious.

1. Overall rubber encapsulation: The gate adopts high-quality rubber for the overall inner and outer rubber. The rubber vulcanization technology enables the vulcanized gate to ensure accurate geometric dimensions, and the rubber and the ductile cast gate are firmly connected, not easy to fall off and elastic Good memory.

2. Flat-bottomed gate seat: The traditional gate valve often silt in the groove at the bottom of the valve due to foreign objects such as stones, wood, cement, iron filings, sundries, etc. after the pipe is flushed with water, which can easily cause water leakage due to inability to close tightly. Phenomenon, the bottom of the elastic seat seal gate valve adopts the same flat-bottom design as the water pipe machine, which is not easy to cause debris siltation and makes the fluid flow unimpeded.

3. Precision casting valve body: The valve body adopts precision casting, and the precise geometric dimensions make the inside of the valve body without any fine processing to ensure the sealing of the valve.