Cryogenic Vacuum Jacketed Shut-Off Valves

Vacuum jacketed valves designed for use with either tube or pipe vacuum jacketed systems

High thermal efficiency, long lasting performance

Techflow™ Gold Series valves come in several standard configurations: straight-through and right-angle, 1/2" ODT (outside diameter tube), and straight-through, right-angle and Y-pattern configurations for pipe systems.  These vacuum insulated shut-off valves are designed for use with a variety of cryogenic liquids.  The valves are available for either manual or pneumatic operation.  Each valve is individually tested to ensure quality standards.

Valve Features

• Preferred flow direction arrow in casting
• Low handle torque for bubble-tight shut-off
• Stainless steel stem and threads
• Redundant stem seal
• Cryogenic stem packing
• Redundant cryogenic bonnet seal
• Brass bonnet
• Bonnet purge port with brass plug (thermal relief)
• All stainless steel body and stem
• MLI on jacketed valves
• Self-aligning seat

Recommended Applications

• Bulk tank shut-off
• System branches - allows isolation of a specific pipe run feeding one or several units.
• Equipment drops
• Before capped bayonets - allows expansion/re-routing of pipes without shutting down entire system.

Gold Series 500 Tube Valves:

Gold Series 840 and 1315 Pipe Valves:

Technical Data

Operating Ranges
Temperature	-450° to 150°F
Operating Pressure
Tube size valves	200 psig
Pipe size valves	300 psig
Heat Leak–Tube size valves
1/2" ODT	2.4 BTU/Hr to 20K
Heat Leak - Pipe size valves
1/2" IPS vertical	4.5 BTU/Hr to 20K
1.0" IPS vertical	10.4 BTU/Hr to 20K
1/2" IPS Y-type	4.5 BTU/Hr to 20K
Thermal performance is the same for both manual and pneumatically actuated valves.
Tests
External Leakage	Mass spec. to 1x10-9 cc Ghe/sec
Seat Leakage	Bubble tight to 150 psig
Proof Pressure - tube size valves	300 psig
Proof Pressure - pipe size valves	400 psig
Materials
Metal surfaces exposed to cryogen or vacuum	304 stainless steel
Packing Retainer	300 stainless steel
Packing	Viton O-rings
Seat Seal	Kel-F
Stem	Close-fit Teflon Spacer

Actuation

A variety of pneumatic actuators are available.

Quality Assurance

Techflow™ Gold Series valves and accessories are backed by our Quality Assurance warranty.  Ask for details.  Technifab Products specializes in liquid cryogen transfer equipment, vacuum jacketed piping, flexible vacuum insulated transfer lines, phase separators, ASME code pressure vessels, custom engineered products for cryogenic applications and other specialty cryogenic equipment.

Cryogenic Vacuum Jacketed Valve Specifications for Techflow™ Valves
Part No.	Description	Type	CV Factor	Size	Operation
TV-GM-0500	Tube	Globe Pattern	0.84	1/2" ODT	Manual
TV-AM-0500	Tube	R-angle	1.16	1/2" ODT	Manual
TV-GP-0500	Tube	Globe Pattern	0.84	1/2" ODT	Pneumatic Actuator
TV-GM-0840	Pipe	Globe Pattern	4.66	1/2" IPS	Manual
TV-GP-0840	Pipe	Globe Pattern	4.66	1/2" IPS	Pneumatic Actuator
TV-YM-0840	Pipe	Y Pattern	4.96	1/2" IPS	Manual
TV-YP-0840	Pipe	Y Pattern	4.96	1/2" IPS	Pneumatic Actuator
TV-GM-1315	Pipe	Globe Pattern	17.23	1.0" IPS	Manual

Download Techflow™ Cryogenic Valves Sales Information

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