How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Gradual On/Off Valves
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Quick-Clamp Through-Wall Fittings for High-Vacuum Chambers
- For Use With: See table
- Environment Temperature Range: 32° to 300° F
- Process Temperature Range: -325° to 995° F
- Tubing: Use with 304/304L or 316/316L stainless steel
- Specifications Met: ISO 2861
Transfer liquids and gases into high-vacuum chambers with these assembled fittings, also known as feedthroughs. Their quick-clamp (ISO-KF) connections are easier to install and remove than bolt-on flanges. This makes them a good choice for systems that need frequent cleaning, repairs, and setup changes, such as those in teaching and research labs. These fittings meet ISO 2861, which means they’re made to strict dimensional standards that ensure vacuum-tight connections. Made of stainless steel and aluminum, these fittings resist rusting. They are not for use in pressure applications.
These fittings are ready to install and include quick-clamp fittings, metal tubing, and Yor-Lok tube fittings at each end. The Yor-Lok fittings include a nut and two sleeves that grip your system’s stainless steel tubing. To complete the quick-clamp connection, you’ll need a clamp and ring (each sold separately).
For technical drawings and 3-D models, click on a part number.
For Tube | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Connection Style | OD | Wall Thick. | Lg. | Max. Vacuum | Material | Each | |
For Use With Liquid Helium, Liquid Methane, Liquid Nitrogen, Liquid Oxygen | ||||||||||
| 1.18" | 16 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 0000000 |
| 1.57" | 25 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| 2.16" | 40 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| 2.95" | 50 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | Material | Max. Vacuum | Each | |
With Wing Nut | ||||||
|---|---|---|---|---|---|---|
| 1.18" | 10, 16 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 00000000 | 00000 |
| 1.57" | 25 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 0000000 | 00000 |
| 2.16" | 40 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 0000000 | 00000 |
| 2.95" | 50 | ISO-KF | Aluminum | 10 -8 torr @ 72° F | 0000000 | 00000 |
Material | |||||||
|---|---|---|---|---|---|---|---|
| For Flange OD | For High-Vacuum Flange Size | High Vacuum Connection Type | O-Ring | Inner Ring | Max. Vacuum | Each | |
| 1.18" | 16 | ISO-KF | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 00000000 | 00000 |
| 1.57" | 25 | ISO-KF | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 0000000 | 00000 |
| 2.16" | 40 | ISO-KF | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 0000000 | 00000 |
| 2.95" | 50 | ISO-KF | Viton® Fluoroelastomer Rubber | 304 Stainless Steel | 10 -8 torr @ 72° F | 0000000 | 00000 |
Flanged Through-Wall Fittings for Ultra-High-Vacuum Chambers
- For Use With: See table
- Environment Temperature Range: 32° to 300° F
- Process Temperature Range: -325° to 995° F
- Tubing: Use with 304/304L or 316/316L stainless steel
Bolt these fittings onto your ultra-high-vacuum chamber to transfer liquids and gases inside. Also known as feedthroughs, they come assembled with a flanged (CF) fitting, metal tubing, and two Yor-Lok tube fittings. Their bolt-together connection forms the tightest seal of any fitting type, so you can use them in semiconductor manufacturing, surface analysis experiments, and even research with particle accelerators. Made of stainless steel and copper, these fittings resist rusting. These fittings are not for use in pressure applications.
To complete the flanged connection, you’ll need a gasket and bolt kit (each sold separately). The Yor-Lok fittings on each end include a nut and two sleeves that grip your system’s stainless steel tubing.
For technical drawings and 3-D models, click on a part number.
Bolt Holes | For Tube | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Bolt Circle Dia. | Dia. | No. of | Connection Style | OD | Wall Thick. | Lg. | Max. Vacuum | Material | Each | |
For Use With Liquid Helium, Liquid Methane, Liquid Nitrogen, Liquid Oxygen | |||||||||||||
| 1 21/64" | 16 | CF | 1 1/16" | 11/64" | 6 | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -13 torr @ 72° F | 304 Stainless Steel | 0000000 | 0000000 |
| 2 3/4" | 40 | CF | 2 5/16" | 17/64" | 6 | Yor-Lok | 1/4" | 0.028"-0.095" | 9" | 10 -13 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| For Flange OD | Gasket Material | Specifications Met | Each | |
| 1 21/64" | Copper | ASTM F68 | 0000000 | 00000 |
Touch-Safe Insulated Cryogenic Hose with Threaded Fittings
- Temperature Range: -325° to 200° F
- Material: 321 Stainless Steel with 304 Stainless Steel Cover
- Both Fittings Swivel Until Tightened
To maintain the temperature of liquids as cold as -325° F, this hose has vacuum insulation and a reflective barrier. This prevents heat transfer in the same way a thermos does, so the exterior of the hose won’t freeze or form condensation. Even when used with liquid argon, liquid carbon dioxide, liquid methane, and liquid nitrogen, this hose is safe to handle. It meets strict ASME design and testing standards for process piping systems.
This hose comes ready to use—you don’t need to create the vacuum yourself. To install, thread the fittings on this hose onto a freezer or other equipment in your plant or laboratory. Both ends swivel until tightened, so you don’t need to rotate the entire hose during installation. With ribbed insulation inside and spiral reinforcement outside, this hose won’t crack or leak when you bend and flex it around obstacles. The cover is 304 stainless steel, which stands up to wear and tear and won’t corrode from mild chemicals and water.
For technical drawings and 3-D models, click on a part number.
Tube Connection | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CGA Number | For Tube OD | Thread Size | Pipe Size | ID | OD | Bend Radius | Max. Pressure | Specifications Met | 3 ft. | 4 ft. | 6 ft. | 8 ft. | 10 ft. | 12 ft. | |
316 Stainless Steel 37°, 45° Flared UN/UNF (JIC) Female × 316 Stainless Steel Threaded NPT Male | |||||||||||||||
| 295 | 1/4" | 7/16"-20 | 1/4 | 1/4" | 1 1/8" | 6 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
| 295 | 3/8" | 9/16"-18 | 3/8 | 3/8" | 1 3/8" | 7 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
| 295 | 1/2" | 3/4"-16 | 1/2 | 1/2" | 1 11/16" | 8 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
Touch-Safe Insulated Cryogenic Hose with Tube Stem Fittings
- Temperature Range: -325° to 200° F
- Material: 321 Stainless Steel with 304 Stainless Steel Cover
Sealed vacuum insulation and a reflective barrier inside this hose maintains the temperature of liquids as cold as -325° F. Similar to a thermos, this prevents heat transfer, so the exterior of the hose won’t freeze or form condensation. This hose is safe to handle, even when used with liquid nitrogen, liquid argon, liquid carbon dioxide, and liquid methane. It meets strict ASME design and testing standards for process piping systems.
The tube stems on each end slide into tube fittings on a freezer or other equipment in your plant or laboratory. With ribbed insulation inside and spiral reinforcement outside, this hose won’t crack or leak when you bend and flex it around obstacles. The cover is 304 stainless steel, which stands up to wear and tear and won’t corrode from mild chemicals and water.
For technical drawings and 3-D models, click on a part number.
| Stem OD | ID | OD | Bend Radius | Max. Pressure | Specifications Met | 3 ft. | 4 ft. | 6 ft. | 8 ft. | 10 ft. | 12 ft. | |
316 Stainless Steel Tube Stem × 316 Stainless Steel Tube Stem | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" × 1/4" | 1/4" | 1 1/8" | 6 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
| 3/8" × 3/8" | 3/8" | 1 3/8" | 7 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
| 1/2" × 1/2" | 1/2" | 1 11/16" | 8 1/2" | 150 psi @ 72° F | ASME B31.3 | 0000000 | ||||||
Threaded Gradual On/Off Valves for Cryogenic Liquid
- Valve Type: Gate
- For Use With: Liquid Argon, Liquid Carbon Dioxide, Liquid Natural Gas, Liquid Methane, Liquid Nitrogen, Liquid Oxygen
- Packing Material: PTFE Plastic
- Specifications Met: ASME B31.3, CGA G-4.1, MSS-SP-80
Built to handle the extreme cold of liquid gases, these bronze valves are ideal for liquid carbon dioxide carbonation systems, liquid nitrogen coolant systems, and other cryogenic applications. They’ll also work with liquified natural gas and liquid oxygen. They’re cleaned and bagged to meet CGA G-4.1 for oxygen service. Also known as gate valves, they open and close gradually with multiple turns of the wheel handle to prevent sudden starts and stops.
The handle raises as these valves open and lowers as they close. At a glance, you can see if flow is on or off. The stem is isolated from what’s flowing through your line, giving these valves a longer lifespan than valves with a nonrising stem. They have a threaded union stem housing, so you can separate the stem from the housing while the valve is inline. That means you can complete maintenance tasks, such as packing the stem, without taking apart your whole setup.
For technical drawings and 3-D models, click on a part number.
O'all | Stem | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Type | Housing Connection Style | Each | |
NPT Female | ||||||||||
Wheel Handle—Bronze Body and Brass Gate | ||||||||||
| 1/2 | 19.8 | 600 psi @ 72° F | -320° to 150° | 2 5/16" | 10 3/16" | 2 5/16" | Rising | Threaded Union | 0000000 | 0000000 |
| 3/4 | 36 | 600 psi @ 72° F | -320° to 150° | 2 1/2" | 11 5/16" | 2 1/2" | Rising | Threaded Union | 0000000 | 000000 |
| 1 | 60 | 600 psi @ 72° F | -320° to 150° | 2 7/8" | 13 1/2" | 2 7/8" | Rising | Threaded Union | 0000000 | 000000 |
| 1 1/2 | 152 | 600 psi @ 72° F | -320° to 150° | 3 7/16" | 18 3/8" | 3 7/16" | Rising | Threaded Union | 0000000 | 00000000 |
| 2 | 245 | 600 psi @ 72° F | -320° to 150° | 3 13/16" | 21 5/16" | 3 13/16" | Rising | Threaded Union | 0000000 | 00000000 |