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Natural gas cut-off valve is a cut-off valve. Common pressure around 16mpa. Mainlyused in gas, oil and gas, field. The main domestic well-known manufacturers have the right to work in Shanghai valve equipment Co., Ltd and Hunan emerging HydropowerEquipment Co., ltd..
Valve is closed parts (valve) moving along the centerline of the valve seat. According to this mobile form of valve, valve seat through the mouth of the change isproportional to the valve stroke. Because of the valve stem to open or close the relatively short trip, and have very reliable cutting off function, and because changes in the valve seat and the valve stroke is proportional, is very suitable for theadjustment of flow. Therefore, this type of valve is suitable for cutting off or adjust the throttle use.
The most obvious advantage of cut-off valve:
(L) in the opening and closing process, because the valve flap and valve sealing surface friction than the gate is small, and therefore wear.
(2) generally only open seat height channel diameter L / 4, so much smaller than the gate.
(3) usually in the valve body and the valve flap is only one sealing surface, and thus comparison of manufacturing processes, ease of maintenance. However, valve defects can not be ignored. Its main drawback is the relatively large flow resistance coefficient, the resulting pressure loss, especially in the hydraulic device, this pressure loss is particularly evident.
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