Connection Style Connection Style |
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| Push to Connect | Yor-Lok |
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| Solder Connect |
For Use With For Use With |
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Shape Shape |
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 | Straight |
Connection Type Connection Type |
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 | Tube |
Body Material Body Material |
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Push-to-Connect Type Push-to-Connect Type |
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Maximum Pressure Maximum Pressure |
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Type Type |
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 | Connector |
Piston Material Piston Material |
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Mounting Orientation Mounting Orientation |
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Valve Type Valve Type |
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Valve Function Valve Function |
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Maximum Temperature Maximum Temperature |
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Spring Material Spring Material |
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Gender Gender |
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Check Valve Type Check Valve Type |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Backflow-Prevention Valves
More
Check Valves with Push-to-Connect Fittings
Insert tubing into the push-to-connect fittings—no heat, solder, or flux required. These valves open to allow flow in one direction and close when flow stops or reverses.
Acetal valves are more wear resistant than PVC valves.
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.
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Ball Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Buna-N Rubber
- For Use With: Air, Water
- Piston Material: Acetal Plastic
- Spring Material: 302 Stainless Steel
- Seal Material: Buna-N Rubber
| For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Color | End-to-End Lg. | Each | |
| 1/4" | 0.65 | 145 psi @ 70° F | 0.3 | -30° to 250° | White | 1 13/16" | 00000000 | 000000 |
- For Use With:
Inch: Air, Argon, Helium, Krypton, Neon, Nirtrogen, Oil, Water, Xenon
Metric: Air, Helium, Krypton, Neon, Nitrogen, Oil, Water, Xenon - Piston Material: Brass
- Spring Material: 302 Stainless Steel
- Seal Material: See Table
| For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Seal Material | End-to-End Lg. | Each | |
| 1/4" | Not Rated | 115 psi @ 70° F | 3 | 0° to 160° | Viton® Fluoroelastomer | 2 1/16" | 00000000 | 000000 |
| 3/8" | Not Rated | 115 psi @ 70° F | 3 | 0° to 160° | Viton® Fluoroelastomer | 2 1/4" | 00000000 | 00000 |
| 4mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 1 3/4" | 00000000 | 00000 |
| 6mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 2 1/16" | 00000000 | 00000 |
| 8mm | Not Rated | 115 psi @ 70° F | 3 | 0° to 175° | Buna-N Rubber | 2 1/4" | 00000000 | 00000 |
Check Valves with Yor-Lok Fittings
Two sleeves give these fittings extra gripping power. They bite into tubing as you tighten the nut to form a strong seal. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. Valves open to allow flow in one direction and close when flow stops or reverses.
316 stainless steel valves are more corrosion resistant than brass valves.
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.
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Piston Material: Brass
- Spring Material: 316 Stainless Steel
- Seal Material: Buna-N Rubber
| For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Yor-Lok Female Inlet × Yor-Lok Female Outlet | |||||||
|---|---|---|---|---|---|---|---|
| 1/8" | 0.22 | 3,000 psi @ 70° F | 1 | -30° to 275° | 2 3/8" | 000000 | 000000 |
| 1/4" | 0.75 | 3,000 psi @ 70° F | 1 | -30° to 275° | 2 1/2" | 000000 | 00000 |
| 3/8" | 2.09 | 2,300 psi @ 70° F | 1 | -30° to 275° | 3 3/8" | 000000 | 000000 |
| 1/2" | 3.3 | 2,200 psi @ 70° F | 1 | -30° to 275° | 4 1/8" | 000000 | 000000 |
| 3/4" | 6.01 | 1,900 psi @ 70° F | 1 | -30° to 275° | 4 3/8" | 000000 | 000000 |
| 1" | 6.56 | 1,500 psi @ 70° F | 1 | -30° to 275° | 4 5/8" | 000000 | 000000 |
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Piston Material: 316 Stainless Steel
- Spring Material: 302 Stainless Steel
- Seal Material: Fluoroelastomer Rubber
| For Tube OD | Flow Coefficient (Cv) | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Each | |
Yor-Lok Female Inlet × Yor-Lok Female Outlet | |||||||
|---|---|---|---|---|---|---|---|
| 1" | 4.48 | 1,500 psi @ 70° F | 0.33 | -10° to 375° | 4 3/4" | 00000000 | 0000000 |
| 3/4" | 4.48 | 1,900 psi @ 70° F | 0.33 | -10° to 375° | 3 1/2" | 00000000 | 000000 |
| 1/2" | 1.68 | 2,200 psi @ 70° F | 0.33 | -10° to 375° | 3" | 00000000 | 000000 |
| 3/8" | 1.47 | 2,300 psi @ 70° F | 0.33 | -10° to 375° | 2 1/2" | 00000000 | 000000 |
| 1/4" | 0.47 | 3,000 psi @ 70° F | 0.33 | -10° to 375° | 2 3/8" | 00000000 | 00000 |
| 1/8" | 0.1 | 3,000 psi @ 70° F | 0.33 | -10° to 375° | 2 1/4" | 00000000 | 00000 |
Check Valves with Solder-Connect Fittings
- For Use With: Steam, Water
- Disc Material: Bronze
- Seal Material: Bronze
Solder these valves to copper tubing for a permanent, leak-tight connection. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
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.
| For Copper Tube Size  | For Tube OD | Flow Coefficient (Cv) | Pressure Class | Max. Pressure | Max. Steam Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Features | Each | |
Bronze Body | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Solder Connect × Solder Connect | |||||||||||
| 1/4 | 3/8" | 1.3 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 1/16" | Removable Cap | 0000000 | 000000 |
| 3/8 | 1/2" | 2.5 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 1/16" | Removable Cap | 0000000 | 00000 |
| 1/2 | 5/8" | 4.8 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 2 9/16" | Removable Cap | 0000000 | 00000 |
| 3/4 | 7/8" | 14.3 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 3 3/8" | Removable Cap | 0000000 | 000000 |
| 1 | 1 1/8" | 24 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 4 1/16" | Removable Cap | 0000000 | 000000 |
| 1 1/2 | 1 5/8" | 60 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 5 1/4" | Removable Cap | 0000000 | 000000 |
| 2 | 2 1/8" | 102 | 125 | 200 psi @ 70° F | 125 psi @ 350° F | 0.5 | -20° to 405° | 6 3/8" | Removable Cap | 0000000 | 000000 |
Check Valves with Push-to-Connect Fittings for Drinking Water
- For Use With: Drinking Water
- Piston Material: Acetal Plastic
- Spring Material:
For 1/2", 8mm, and 10mm Tube ODs: Acetal Plastic
All other sizes: Stainless Steel - Seal Material: See table
Insert tubing into the push-to-connect fittings on these valves—no heat, solder, or flux required. Valves meet NSF/ANSI 61 for use in drinking water systems. All open to allow flow in one direction and close when flow stops or reverses.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Seal Material | Color | End-to-End Lg. | Each | |
Acetal Plastic Body | ||||||||
|---|---|---|---|---|---|---|---|---|
Push to Connect × Push to Connect | ||||||||
| 1/4" | 145 psi @ 70° F | 0.3 | 40° to 100° | Acetal Plastic | White | 1 15/16" | 0000000 | 000000 |
| 5/16" | 145 psi @ 70° F | 0.3 | 40° to 100° | Acetal Plastic | White | 2" | 0000000 | 00000 |
| 3/8" | 145 psi @ 70° F | 0.3 | 40° to 100° | Acetal Plastic | White | 2 5/8" | 0000000 | 00000 |
| 8mm | 145 psi @ 70° F | 0.333 | 35° to 145° | EPDM Rubber | White | 1 15/16" | 0000000 | 00000 |
| 10mm | 145 psi @ 70° F | 0.333 | 35° to 145° | EPDM Rubber | White | 2 1/4" | 0000000 | 00000 |
Air Flow Check Valves
Inlet × Push-to-Connect
Female Outlet
Valves open to allow flow in one direction and close when flow stops or reverses.
Valves with push-to-connect ports are for use with plastic or soft metal tubing. Insert tubing into the port.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Inlet Tube OD | For Outlet Tube OD | Flow Coefficient (Cv) | Max. Pressure, psi | Min. Opening Pressure, psi | Temp. Range, °F | Lg. | Dia. | Color | Each | |
Nylon Plastic Body | ||||||||||
| 5/32" | 5/32" | 0.14 | 145 | 7 | 32° to 158° | 1 1/2" | 5/8" | Black | 000000 | 000000 |
| 1/4" | 1/4" | 0.16 | 145 | 7 | 32° to 158° | 1 5/8" | 3/4" | Black | 000000 | 00000 |
| 5/16" | 5/16" | 0.93 | 145 | 7 | 32° to 158° | 2 1/16" | 3/4" | Black | 000000 | 00000 |
| 3/8" | 3/8" | Not Rated | 145 | 7 | 32° to 158° | 2 1/2" | 15/16" | Black | 000000 | 00000 |
| 4mm | 4mm | 0.14 | 145 | 7 | 32° to 158° | 38.1mm | 15.9mm | Black | 000000 | 00000 |
| 6mm | 6mm | 0.16 | 145 | 7 | 32° to 158° | 41.3mm | 15.9mm | Black | 000000 | 00000 |
| 8mm | 8mm | 0.93 | 145 | 7 | 32° to 158° | 51mm | 19mm | Black | 000000 | 00000 |
| 10mm | 10mm | Not Rated | 145 | 7 | 32° to 158° | 63.5mm | 23.8mm | Black | 000000 | 00000 |
| 12mm | 12mm | Not Rated | 145 | 7 | 32° to 158° | 66.7mm | 23.8mm | Black | 000000 | 00000 |