CNG LNG Cryogenic piston lifting check valve

SAMPLE SPECIFICATIONS
SIZE: DN25 DN40
RATING: PN16
END: BW AS PER B16.25
TEMPERATURE: -196 ℃
BODY AND BONNET : ASTM A351 CF8
PLUG: ASTM A182 F304+HF
SEAT: PCTFE OR HF METAL
ACTUATION: SPRING LOADED

GENERAL

Size: 1/8″~36″.
Pressure Rating: 150LB~4500LB, PN6~PN750
Design Temperature: -196℃~800℃.
General applications: CNG, LNG,LPG, CO2, N2, other cryogenic duty.STEAM thermal duty.

DESIGN

Design & Manufacture: BS 6364, API 6D , ASME B16.34 are basic,other norms could be used according to orders.
F TO F dimensions: API 6D, ASME B16.10, BS EN 558
Connection: ASME B16.25, ASME B16.5, ASME B16.47, EN 1092, JIS 5K-20K. BW, RTJ are available.
Safety design: fire proof

GENERAL MATERIAL

BODY: ASTM A182 F304/F316/F304L/F316L/F51/F53, MONEL K400/K500, H276,INCONEL 625/718
PLUG: ASTM A182 F304, F316
SEAT: PCTFE, PEEK, HF METAL
OPERATOR: SPRING LOADED
OTHER SPECIAL MATERIALS ARE AVAILABLE TO CUSTOMIZE.

TEST

Inspection and approval norm: API598, API6D, BS6364.

QUALITY CONTROL:

100% Chemical analysis and mechanical test with raw materials of each heat numbers.
100% DPT test with the castings, partly MT or UT test, RT is always available if required.
100% hydraulic test with the shell and seal and low pressure air test.

GUATANTEE:

SAVVY VALVES provide 12 months service life at least, free spares and maintenance instruction will be provided when required.

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How Does A CNG LNG Cryogenic Piston Lifting Check Valve Work?

A CNG LNG cryogenic piston lifting check valve is designed for ultra-low temperature applications, typically found in the storage and transport of liquefied gases like LNG and CNG. This valve operates automatically, allowing flow in one direction and preventing backflow by means of a vertically moving piston. When fluid flows in the correct direction, pressure lifts the piston to open the valve; if flow reverses, the piston drops to seal the passage instantly. Built with cryogenic-grade materials, the valve maintains tight sealing and structural integrity at extremely low temperatures. It is commonly installed in cryogenic pipelines, storage tanks, and vaporizers, ensuring safe and efficient system operation. The piston design provides precise response to flow changes, while the robust construction ensures long service life and reliable backflow prevention even under severe cryogenic conditions.

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