Cryogenic Gate Valve

Technical Summary

Nominal Size: 2” to 36”

Pressure Class: Class 150 to Class 1500

Temperature Range: -196°C to +200°C

Design Standards: API 600, BS 6364, ASME B16.34

Face to Face: ASME B16.10

End Connections: Flanged / Butt Weld

Inspection and Testing: API 598, BS 6364

Construction and Materials

Body and Pressure Retaining Parts

• ASTM A351 CF8M
• ASTM A182 F316 / F316L
• ASTM A182 F51 (Duplex)
• ASTM A182 F53 (Super Duplex)

Internal Components

• Gate: ASTM A182 F316 / F316L / Duplex / Super Duplex
• Stem: ASTM A182 F316 / F316L
• Seat Ring: Stainless Steel / Hard faced (Stellite)

Sealing System

• Packing: Graphite / Cryogenic low-temperature packing
• Gasket: Spiral wound gasket with graphite filler
• Backseat: Integral backseat design to prevent leakage through stem

Functional Design

Cryogenic Gate Valve is designed for full bore isolation in ultra-low temperature applications. The valve incorporates an extended bonnet that ensures the stem sealing area remains above the cryogenic temperature zone, preventing packing failure and ensuring operational reliability.

The gate provides a straight-through flow path with minimal pressure drop, making it suitable for applications requiring full flow capacity. Material selection and design considerations ensure dimensional stability and tight shut-off under extreme thermal contraction conditions.

Material and Grade

Standard Materials

Component	Material	Grade	Typical Application
Body	Stainless Steel	ASTM A351 CF8M	Cryogenic LNG and industrial gas systems
Body	Forged Stainless Steel	ASTM A182 F316 / F316L	Low temperature service with high mechanical integrity
Body	Duplex Stainless Steel	ASTM A182 F51	High strength and corrosion resistance
Gate	Stainless Steel	ASTM A182 F316 / F316L	Flow isolation
Stem	Stainless Steel	ASTM A182 F316 / F316L	Low temperature toughness and corrosion resistance
Seat Ring	Stainless Steel with Stellite overlay	Hard faced	Wear resistance and tight sealing

Extended Materials (On Request)

• Super Duplex Stainless Steel (F53 / F55) for offshore LNG applications
• Inconel 625 for extreme cryogenic and high pressure conditions
• Titanium Grade 2 / 5 for specialized cryogenic service

Additional Information

Valve Type	Cryogenic Gate Valve
Operation	Manual / Electric / Pneumatic
Design Feature	Extended bonnet for thermal isolation
Flow Characteristics	Full bore design with minimal pressure drop
Leakage Control	Tight shut-off with metal seated design
Temperature Capability	Suitable for ultra-low temperature service down to -196°C
Service Media	LNG, liquid nitrogen, liquid oxygen, liquid hydrogen

End Connections

• Flanged as per ASME B16.5
• Butt weld as per ASME B16.25

Applications

• LNG industry: isolation in liquefaction, storage, and regasification systems
• Gas processing plants: cryogenic hydrocarbon handling systems
• Oil and gas industry: low temperature pipeline isolation
• Industrial gas sector: oxygen, nitrogen, and hydrogen handling systems
• Power generation: cryogenic fuel and gas supply isolation
• Marine and offshore: LNG carriers and cryogenic transfer systems