Cryogenic Six-Eccentric Butterfly Valve

CVS-290C

Cryogenic Six-Eccentric Butterfly Valve

The definitive solution for absolute zero-leakage in ultra-low temperature applications, ensuring safety and efficiency in handling cryogenic fluids like LNG.

Liquefied Natural Gas (LNG)

Liquid Nitrogen & Oxygen

Aerospace Fueling

Scientific Research

CVS-290C

Guaranteed Cryogenic Sealing: The innovative six-eccentric geometry provides a perfect metal-to-metal seal that remains bubble-tight even at -196°C, compensating for material shrinkage and ensuring zero product loss. Friction-Free & Ice-Resistant: The non-rubbing design completely eliminates the risk of galling or seat damage from ice formation during operation, guaranteeing reliable cycling and a long service life in cryogenic conditions. Enhanced Safety for Hazardous Media: By achieving true zero leakage, the CVS-290C provides the highest level of safety for flammable and hazardous cryogenic fluids, protecting personnel and the environment.

Material	SA351 CF8M (Austenitic Stainless Steel) Bronze Alloys
Temperature	-196°C to 120°C (-321°F to 248°F)
Pressure	PN 25 / Class 150 (25 bar / 218 PSI) PN 40 / Class 300 (40 bar / 580 PSI)
Connection	Wafer-type flange Lug-type flange (Often with extended bonnet)
NPS	3″, 4″, 6″, 8″, 10″, 12″, 14″, 16″, 18″, 20″, 24″
DN	80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600
Medium	LNG, liquid nitrogen, liquid oxygen, liquid hydrogen, ethylene, etc.

Key Features

Six-Eccentric Metal-to-Metal Cryogenic Sealing
Advanced six-eccentric cone-to-cone geometry ensures true bi-directional zero leakage, even under extreme cryogenic temperature conditions.
Guaranteed Bubble-Tight Shut-Off at -196°C
Engineered to maintain sealing integrity down to -196°C (-321°F), compensating for material contraction and preventing product loss.
Friction-Free, Non-Rubbing Design
Eliminates seat galling and wear during operation, ensuring smooth cycling and extended service life in cryogenic applications.
Extended Bonnet Configuration
Often supplied with an extended bonnet to protect stem packing from low-temperature exposure and ensure operational reliability.
Enhanced Safety for Hazardous Media
Provides absolute zero leakage performance for flammable and hazardous cryogenic fluids, improving plant safety and environmental protection.
Cryogenic-Grade Materials
Manufactured in ASTM A351 CF8M (Austenitic Stainless Steel) and compatible bronze alloys for excellent toughness and low-temperature performance.
Wide Cryogenic Temperature Range
Operating temperature from -196°C to 120°C (-321°F to 248°F).
Pressure Ratings
Available in:
- PN25 / Class 150
- PN40 / Class 300
  Suitable for medium-pressure cryogenic service.
Flexible End Connections
Offered in Wafer-Type and Lug-Type Flange configurations to suit various installation requirements.
Broad Size Range
Sizes from 3” to 24” (DN 80–600) for LNG terminals and industrial gas systems.
Designed for Critical Cryogenic Applications
Ideal for LNG, liquid nitrogen, liquid oxygen, liquid hydrogen, ethylene, aerospace fueling systems, and scientific research facilities.
Long-Term Reliability in Thermal Cycling
Maintains sealing performance through repeated extreme temperature fluctuations.