On/Off & Shut Off Valves – Shutoff – SV & VO Series Vacuum Seal Off Valves The most diverse product offering of high vacuum and ultra-high vacuum relieving and non-relieving seal-off valves available from CIRCOR Power & Process. Our low profile, compact design and reliable vacuum tight sealing capabilities make these valves the choice for all your vacuum sealing applications. Whether it be vacuum insulated piping, vacuum chambers, Dewar's and pressure vessels, or over the road cryogenic transporters these valves will assure long lasting vacuum tight integrity and safety. All our vacuum seal-off valves and tool operators are tested to meet 1 x 10-9 scc GHe/sec mass spectrometer seat leakage. Features: Available in a variety of configurations from 1/4" to 3" sizes Available in stainless steel and aluminum If you would like additional information, please click on any literature link below or Contact Us directly so that we may provide you with detailed specifications. Solutions Cryogenic Control Brands CPC-Cryolab Literature SV1 Series - Vacuum Seal-Off Valves and Valve Operators PDF Size: 33KB SV2 & SV3 Series - Vacuum Seal-Off Valves and Valve Operators PDF Size: 37KB SV7 Series - Vacuum Seal-Off Valves and Valve Operators PDF Size: 33KB SV8 Series - Vacuum Seal-Off Valves and Valve Operators PDF Size: 33KB SV9 Series - Vacuum Seal-Off Valves and Valve Operators PDF Size: 33KB