Cast Steel Flanged Extended Stem Cryogenic Ball Valve (GADQ41F)

Flange connection Cryogenic ball valve is used for low temperature working condition, especially for hazard media, such as liquidized natural gas. Applied to LNG plant, LNG receiving station, LNG gasification station and LNG carrier and ship.

Cryogenic ball valve technology standard

• Design standard: 6D , ASME B16.34
• Structural length: 6D, ASME B16.10
• Test & inspection : 6D, 598
• Pressure and temperature: ASME B16.34
• Flange ends: ASME B 16.5 , JB/T 79
• The size of valve connecting flange can be designed according to customer's requirement.

• An extended bonnet to the valve can make the packing gland in the valve and the actuator further away from the cold process so the valve can open and close properly, protect it from freeze-damage caused by low temperature fluid.
• Low operating torque for smoother operations.
• Excellent seat and seal design minimizes leakage.
• Fire-safe design.
• Rigid body construction minimizes thermal shrinkage.
• By adopting different materials, the cryogenic ball valve is applicable to different working temperature and medium. The minimum temperature for the ball valve is -196ºC.

• The fluid resistance is small, its resistance coefficient with section of equal length.
• Simple structure, small volume, light weight.
• Compact and reliable, widespread use of plastic ball valve sealing surface materials, good sealing, widely used in vacuum systems.
• Easy to operate, open and close quickly.
• Easy maintenance, sealing ring replacement is more convenient.
• In fully open or closed state, ball and seat sealing surfaces are isolated from medium, preventing erosion.
• Applicable scope is wide, from small to large sizes, and from high vacuum to high pressure.

Main Parts and Materials

No	Part Name	Materials (-46°C~-101°C~-196°C)
1	Left Body	A352-LCB,LCC,LC3,A351-CF8,A351-CF8M
2	Seat	PTFE,RPTFE,PEEK,PPL,POM,KARBATE,NYLON
3	Ball	A182-F304,F316
4	O-ring	PTFE
5	Gasket	Flexible graphite+304/316, PTFE
12	Stem	Flexible graphite,PTFE
21	Extended bonnet	A352-LCB,LCC,LC3,A351-CF8,CF8M

Class 150 Dimensions (mm)