The Hobbs Cryogenic Valve (-196°C)
For years valves have had to operate in harsh conditions such as temperatures as low as -196°C in order to give isolation in industries such as
- Liquid hydrogen
- Liquid oxygen
Due to the importance of speed in operation, users have opted for quarter turn valves and the Triple Offset Butterfly Valve in more recent years.
Hobbs Cryogenic Butterfly Valve range gives the requirements for Cryogenic duties including:
- Leak tight isolation
- Flow control
The range also has quick operation thanks to its ¼ turn design.
Features and Benefits of Hobbs Cryogenic Valve
- Zero leakage performance down to unique sealing method and triple off set concept – allows full isolation to be maintained at cryogenic levels
- No open cavities so fluids can not be trapped after valve operation
- Metal to metal sealing barely affected by low temperature – valve performance and the operating torque are the same at ambient and cryogenic temperatures
- One piece shaft design ensuring no chance of stem failure
- Extended bonnet with a gas column to keep the Shaft (Stem) packing away from cryogenic fluids. This is normally supplied in a fabricated or cast condition with a minimum length 250mm. Hobbs innovative designs allow for specific solutions to suit the applications needs.
- Quarter turn operation provides lower fugitive emissions than that of rising or multi-turn type valves
- Extension bonnet is connected to the valve by an ANSI standard flange connection.