About On/Off Valves
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Threaded On/Off Valves for Vacuum
- Valve Type: Ball
- For Use With: Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon
- Seal Material: PTFE Plastic
- Specifications Met: C-UL Listed, UL Listed
The bolted-body design provides strength for a tight seal in vacuum conditions up to 29.9” Hg for applications such as vacuum coating and heat treating, leak testing, and analyzing gases. These valves are standard port, so they slightly restrict flow.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Temperature Range, °F | Vacuum Rating, in. of Hg | End-to-End Lg. | Each | |
Brass Body | ||||||||
|---|---|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||||
| 1/4 | 11 | 600 psi @ 200° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 2 3/8" | 0000000 | 0000000 |
| 3/8 | 16 | 600 psi @ 200° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 2 3/8" | 0000000 | 000000 |
| 1/2 | 16 | 600 psi @ 200° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 2 3/8" | 0000000 | 000000 |
| 3/4 | 37 | 600 psi @ 200° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 2 9/16" | 0000000 | 000000 |
| 1 | 49 | 600 psi @ 200° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 3 1/16" | 0000000 | 000000 |
| 1 1/4 | 49 | 400 psi @ 100° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 3 7/16" | 0000000 | 000000 |
| 1 1/2 | 100 | 400 psi @ 100° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 3 3/4" | 0000000 | 000000 |
| 2 | 115 | 400 psi @ 100° F | 149 psi @ 365° F | -20° to 400° | 29.9 | 4 1/16" | 0000000 | 000000 |