How to Identify and Measure Fittings
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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 Tube | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | High-Vacuum Flange Size | High Vacuum Connection Type | Connection Style | OD | Wall Thick. | Lg. | Max. Vacuum | Material | Each | |
For Use With Acetone, Air, Ammonium Hydroxide, Helium, Methane, Nitrogen, Oil, Water | ||||||||||
| 1.18" | 16 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 8" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 0000000 |
| 1.57" | 25 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 8" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| 2.16" | 40 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 8" | 10 -8 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
| 2.95" | 50 | ISO-KF | Yor-Lok | 1/4" | 0.028"-0.095" | 8" | 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.
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 Acetone, Air, Ammonium Hydroxide, Helium, Methane, Nitrogen, Oil, Water | |||||||||||||
| 1 21/64" | 16 | CF | 1 1/16" | 11/64" | 6 | Yor-Lok | 1/4" | 0.028"-0.095" | 8" | 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" | 8" | 10 -13 torr @ 72° F | 304 Stainless Steel | 0000000 | 000000 |
Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing
- For Use With: Ammonia, Argon, Butane, Carbon Dioxide, Chloride, Fluoride, Fluorocarbon, Germane, Halide, Helium, Hydrogen, Krypton, Laser Gas, Natural Gas, Neon, Nitrogen, Oxygen, Silane, Sulfur Hexafluoride, Tungsten Hexafluoride, Xenon
- Temperature Range: -420° to 1000° F
- Tubing: Use with 316/316L stainless steel
- Compatible With: Swagelok® VCR
Polished to at least a 15 Ra finish on the inside, these fittings have an ultra-smooth interior surface that helps prevent contamination. Also known as ultra-high-purity fittings, they’re packed in a Class 100 clean room, cleaned, and double bagged. They are commonly used in semiconductor applications. Fittings use a metal gasket (sold separately), which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and ultra-high-vacuum applications. Fittings are 316 stainless steel for excellent corrosion resistance.
To assemble, place a gasket between the gasket ends before gently rotating the female-threaded fitting onto the male-threaded fitting. Tighten until 1/8 of a turn past finger tight.
Through-wall fittings mount through your wall or panel to create an inlet or outlet. They’re also known as bulkhead couplings and panel-mount couplings.
| For Tube OD | Material | Max. Pressure | Max. Vacuum | Interior Smoothness, Ra | Environmental Rating | Each | |
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 5 | Fed. Std. Class 100 | 00000000 | 000000 |
| For Tube OD | Nut Material | Max. Pressure | Max. Vacuum | Lg. | Each | |
Male | ||||||
|---|---|---|---|---|---|---|
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 17/32" | 00000000 | 00000 |
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 23/32" | 0000000 | 0000 |
Female | ||||||
| 1/4" | 316L Stainless Steel | 5,100 psi @ 72° F | 10 -11 torr @ 72° F | 13/16" | 0000000 | 0000 |
Retaining
Tabs
Nickel gaskets are softer than stainless steel gaskets, so they won’t wear down sealing surfaces as much, and they’re easier to tighten. They’re reactive to carbon monoxide and ozone, so they shouldn’t be used with those chemicals.
Hard and heat resistant, stainless steel gaskets can be used in a wider range of applications than nickel gaskets such as carbon monoxide and ozone. However, they’re harder to tighten than nickel gaskets, and they’ll wear down sealing surfaces more quickly.
Silver-plated stainless steel gaskets are softer than unfinished stainless steel gaskets, so they won’t wear down sealing surfaces as much, and they’re easier to tighten. However, they oxidize when exposed to air, and silver particles might flake off during assembly.
Gaskets with retaining tabs stay in place during installation, so you don’t have to hold the gasket while fastening fittings together. This also means they’re less likely to scratch or nick your fittings by rotating during installation.
| For Tube OD | Max. Vacuum | Environmental Rating | Each | |
Nickel Gasket | ||||
|---|---|---|---|---|
| 1/4" | 10 -11 torr @ 72° F | Fed. Std. Class 100 | 00000000 | 00000 |
316L Stainless Steel Gasket | ||||
| 1/4" | 10 -11 torr @ 72° F | Fed. Std. Class 100 | 0000000 | 0000 |
Silver-Plated 316L Stainless Steel Gasket | ||||
| 1/4" | 10 -11 torr @ 72° F | Fed. Std. Class 100 | 00000000 | 0000 |
316L Stainless Steel Gasket with Retaining Tabs | ||||
| 1/4" | 10 -11 torr @ 72° F | Fed. Std. Class 100 | 00000000 | 0000 |