Stainless steel low-temperature gate valve closure, the sealing surface can only rely on media pressure to seal, that is, relying on media pressure will be the sealing surface of the gate to the other side of the valve seat to ensure that the sealing surface of the sealing surface, which is self-sealing. Most of the gate valve is used to force the seal, that is, when the valve is closed, to rely on external forces to force the gate to the valve seat to ensure that the sealing surface of the seal.
When the valve is opened, when the gate lifting height is equal to 1:1 times the diameter of the valve, the passage of the fluid is completely open, but in operation, this position can not be monitored. In actual use, it is the apex of the valve stem as a mark, i.e., the position of opening motionless, as its fully open position. In order to take into account the temperature changes in the phenomenon of locking, usually open to the apex of the position, and then back 1/2-1 turn, as the fully open position of the valve. Therefore, the valve's fully open position, according to the position of the gate (i.e., travel> to determine.
Cryogenic Gate Valves Specification
Pressure range: Class 150-600 LB
Nominal diameter: NPS 2-36 Inch
Body material: stainless steel, Alloy steel
End connection: RF, RTJ, BW
Minimum working temperature: -196 ℃
Mode of operation: Handwheel, Gearbox, Electric, Pneumatic, hydraulic device, Pneumatic-hydraulic device
SS Cryogenic Gate Valves
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