Gate valve J41H-25C

Product features

1. Gate valve refers to a valve in which the closing element (gate) moves vertically along the centerline of the passage. Gate valves can only be used for fully open and fully closed shut-off in pipelines, and cannot be used for regulation or throttling.

2. When the gate valve is closed, the sealing surface can rely solely on the medium pressure to seal, that is, relying on the medium pressure to press the sealing surface of the gate plate towards the other side of the valve seat to ensure the sealing of the sealing surface, which is self sealing. Most gate valves adopt forced sealing, which means that when the valve is closed, external force must be used to forcefully press the gate plate towards the valve seat to ensure the sealing of the sealing surface.

3. When opening the valve, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel is completely unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position that cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening to the top position and then reversing 1/2 to 1 turn as the fully open valve position. Therefore, the fully open position of the valve is determined based on the position (i.e. stroke) of the gate.

Product standards: GB 12234, GB12224

Nominal pressure: PN16-PN320

Nominal diameter: DN50-DN1200

Main material: WCB WCC; 20CrMo, 1Cr5Mo, 20CrMoV; CF8, CF8M, CF3, CF3M; LCB, LCc

Operating temperature: -60 ℃~593 ℃

Applicable media: various media such as water, steam, oil, nitric acid, acetic acid, highly oxidizing media, and urea

Connection method: flange, butt welding

Transmission mode: lifting handwheel, non lifting handwheel, bevel gear, electric drive device, pneumatic drive device

Inspection standards: JB/T9092, GB/T13927