About On/Off Valves
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About Gradual On/Off Valves
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On/Off Valves with High-Vacuum Fittings
- Valve Type: Ball
- For Use With: Air, Oil, Water
- Seal Material: PTFE Plastic
To create a tight seal in vacuum conditions higher than 29.9” Hg, these valves have ultra-high-vacuum tube fitting connections, which are also known as KF, QF, and NW fittings. They’re often used in applications such as vacuum coating and heat treating, leak testing, and analyzing gases. The three-piece bolted body comes apart for inline replacement of internal components. Body is 316 stainless steel for excellent corrosion resistance. The lockable lever handle can be fixed in place using a padlock (not included). Valves are full port, so they do not restrict flow.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Flange OD | Max. Pressure | Temperature Range, °F | Vacuum Rating, Torr | End-to-End Lg. | For Max. Shackle Dia. | Valve Trade Number | Each | |
316 Stainless Steel Body  | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Quick Clamp × Quick Clamp | |||||||||
| 1/2" | 1 3/16" | 1000 psi @ 150° F | 0° to 300° | 0.0001 | 4 5/16" | 1/4" | 10 | 0000000 | 0000000 |
| 3/4" | 1 3/16" | 1000 psi @ 150° F | 0° to 300° | 0.0001 | 4 11/16" | 1/4" | 16 | 0000000 | 000000 |
| 1" | 1 9/16" | 1000 psi @ 150° F | 0° to 300° | 0.0001 | 4 7/8" | 1/4" | 25 | 0000000 | 000000 |
| 1 1/2" | 2 3/16" | 1000 psi @ 150° F | 0° to 300° | 0.0001 | 5 5/8" | 5/16" | 40 | 0000000 | 000000 |
| 2" | 2 15/16" | 1000 psi @ 150° F | 0° to 300° | 0.001 | 6 3/8" | 5/16" | 50 | 0000000 | 000000 |
Gradual On/Off Valves with Quick-Clamp Fittings for High Vacuum
Also known as vacuum isolation valves, these block flow so you can install and remove gauges from your system. They can also be used to add or vent gases in high-vacuum systems. Valves gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping flow. They connect to another quick-clamp fitting with a clamp and a ring (sold separately). All have a nonrising stem that stays in the same position whether the valve is open or closed. Body is 304 stainless steel for good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- Valve Type: Gate
- For Use With: Air
- For Tube Material: 304/304L Stainless Steel, 316/316L Stainless Steel
- Seal Material: Viton® Fluoroelastomer Rubber
- Specifications Met: ISO 2861
O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Flange OD | Max. Vacuum | Temp. Range, °F | Ht. | Lg. | High-Vacuum Flange Size | Sterilize With | Stem Type | Each | |
Quick Clamp | ||||||||||
304 Stainless Steel Body—316 Stainless Steel Gate | ||||||||||
| 1/2" | 1 3/16" | 10 -7 torr @ 72° F | 0° to 190° | 4 1/8" | 2 1/4" | 10 | Steam (Autoclaving) | Nonrising | 00000000 | 0000000 |
| 3/4" | 1 3/16" | 10 -7 torr @ 72° F | 0° to 190° | 4 1/8" | 2 1/4" | 16 | Steam (Autoclaving) | Nonrising | 00000000 | 000000 |
| 1" | 1 9/16" | 10 -7 torr @ 72° F | 0° to 190° | 5 5/8" | 3" | 25 | Steam (Autoclaving) | Nonrising | 00000000 | 000000 |
| 1 1/2" | 2 1/8" | 10 -7 torr @ 72° F | 0° to 190° | 6 3/8" | 3 7/8" | 40 | Steam (Autoclaving) | Nonrising | 00000000 | 000000 |
| 2" | 2 15/16" | 10 -7 torr @ 72° F | 0° to 190° | 8" | 4 1/2" | 50 | Steam (Autoclaving) | Nonrising | 00000000 | 000000 |
- For Use With: Air
- O-Ring Material: Fluoroelastomer Rubber
- For Tube Material: 304/304L Stainless Steel, 316/316L Stainless Steel
- Inner Ring Material: 304 Stainless Steel
- Specifications Met: ISO 2861
Use these rings with quick-clamp high-vacuum fittings. They consist of a stainless steel inner ring covered by a fluoroelastomer O-ring.
Rings with screen have a stainless steel screen to filter out large particles.
| For Tube OD | For Flange OD | For High-Vacuum Flange Size | Max. Vacuum | Temp. Range, °F | Lg. | Max. Pressure | Each | |
Rings | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2" | 1.18" | 10 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
| 3/4" | 1.18" | 16 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 0000 |
| 1" | 1.57" | 25 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 0000000 | 00000 |
| 2" | 2.95" | 50 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 0000000 | 00000 |
Rings with Stainless Steel Screen | ||||||||
| 3/4" | 1.18" | 16 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
| 1" | 1.57" | 25 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
| 1 1/2" | 2.16" | 40 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
| 2" | 2.95" | 50 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
Rings with Aluminum Outer Ring | ||||||||
| 3/4" | 1.18" | 16 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | Not Rated | 00000000 | 00000 |
| 1" | 1.57" | 25 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | 100 psi @ 72° F | 0000000 | 00000 |
| 1 1/2" | 2.16" | 40 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | 75 psi @ 72° F | 0000000 | 00000 |
| 2" | 2.95" | 50 | 10 -7 torr @ 72° F | 0° to 300° | 5/16" | 50 psi @ 72° F | 0000000 | 00000 |