Payment & Shipping Terms:
|Place Of Origin:
|Temperature Of Media:
dn20 stainless steel knife gate valve,
gb stainless steel knife gate valve,
dn20 manual knife gate valve
Stainless Steel Cast Iron Manual Flange Knife Gate Valve Connection GB
Cangzhou Junxi International Trade Co., Ltd.
Our company produce and export all kinds of carbon steel pipe fittings,Seamless Pipe Fittings, Our city Cang Zhou city is the hometown of carbon steel pipe fittings. We have exported to many countries, such as, Russia, Egypt Malaysia, India, Turkey, Indonesia, Jordan etc.
About the pipe fitting machine, we have different type for every machine.We have hot forming elbow machine, cold forming elbow machine, cold forming tee machine, beveling machine, shot blasting machine, etc.. Machine guarantee is one year. If our clients machine has problem, our after sale service person will come and help the clients solve the problem as quickly as possible.
Use of valves
When gate valve is closed
The sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure the sealing surface, this is self-sealing.Most gate valves are forced to seal, that is, when the valve is closed, it is necessary to rely on external force to force the gate to the valve seat to ensure the sealing surface of the sealing.
Open the door
When the gate height is equal to 1:1 of the valve diameter, the flow path is completely clear, but this position cannot be monitored during operation.In practice, the vertex of the valve stem is used as a sign, that is, the position of the open, as its full open position.In order to consider the temperature changes appear lock phenomenon, usually open to the apex position, and then back to the 12-1 turn, as the position of the full open valve.Therefore, the fully open position of the valve is determined by the position of the gate (i.e. the stroke).
Installation and maintenance of gate valves should pay attention to the following matters:
1. Gate valve handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
2. The double gate plates of gate valves should be installed vertically, that is, the stem is in a vertical position, and the handwheel is at the top.
3 gate valve with bypass valve should be opened before opening the bypass valve to balance the pressure difference between the inlet and outlet and reduce the opening force.
4. For gate valves with driving mechanism, install according to the instructions of the product.5. If the gate valve is often used, lubricate it at least once a month.
|Water, Air, Gas, etc
|0 to 120 centigrade.
|Cast iron, Carbon steel, Stainless steel
|API 598/API 6D;
|API 598/ISO 5208/EN12226-1
|water and neutral liquid
|Face to Face
Contact Person: Darcy Dong
Tel: 0086 18632745010