ROYCEO

While no strict guidelines are in place for valve type in cryogenic service, there is a trend to select quarter-turn ball valves for their tight-shutoff capabilities.

This quarter-turn motion is also found in high-performance and triple offsetbutterfly valves.

For larger valve sizes, butterfly valves are often used instead of ball valves because ball valves can be more expensive.

Ball valves can be more costly upfront but save costs long term through enhanced valve performance and longevity.

Flange and welded configurations are used mostly for cryogenic piping connections, although customer preference typically determines which type is used.

Valves intended for cryogenic service should be assembled in a clean room and be lubricant free or utilize lubricants compatible with cold service.

The valves should not have machine oil, grease, dirt, or any foreign material in the valve for the clean service. Any unnecessary matter can inhibit the valve performance at cryogenic temperatures.

When buying a valve for cryogenic service, the operator should request documented procedures for cleaning to verify that the manufacturer followed proper procedures during the assembly process.

Cryoval rigorously prepares valve components for clean-room assembly and takes the precautions to keep components contaminant free to the standards required by the industry.