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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 On/Off Valves
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How to 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.
More
About Flowmeters and Totalizers
Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.
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About Precision Flow-Adjustment Valves
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Precision Flow-Adjustment Valves with Compression Fittings
The compression sleeve on these valves bites into tubing as you tighten the nut, forming a strong seal. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. All have metal-to-metal seats that resist temperature fluctuations.
Valves with packing have a nut that can be tightened to compress the packing if it leaks.
For technical drawings and 3-D models, click on a part number.
- Valve Type: Needle
- For Use With: Air
- Seal Material: Neoprene Rubber
On/Off Valves with Compression Fittings
A compression sleeve bites into tubing as you tighten the nut, forming a strong seal.
316 stainless steel valves are more corrosion resistant than brass valves.
Full-port valves do not restrict flow.
Standard-port valves 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.
- Valve Type:
Brass Seal: Plug
All Other Valves: Ball - For Use With: See table
| For Tube OD | For Copper Tube Size | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Temperature Range, °F | Port Type | End-to-End Lg. | For Use With | Each | |
Brass Body—Brass Seal | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" | __ | Not Rated | 30 psi @ 125° F | __ | 35° to 125° | Standard | 2 3/8" | Water, Air | 000000 | 000000 |
| 3/8" | __ | Not Rated | 30 psi @ 125° F | __ | 35° to 125° | Standard | 2 7/16" | Water, Air | 000000 | 00000 |
Brass Body—Buna-N Rubber Seal | ||||||||||
| 5/8" | 1/2 | 16 | 600 psi @ 215° F | 600 psi @ 215° F | -20° to 400° | Full | 3" | Water, Oil, Argon, Helium, Krypton, Neon, Xenon, Steam | 0000000 | 00000 |
| 7/8" | 3/4 | 30 | 600 psi @ 215° F | 600 psi @ 215° F | -20° to 400° | Full | 3 7/16" | Water, Oil, Argon, Helium, Krypton, Neon, Xenon, Steam | 0000000 | 00000 |
| 1 1/8" | 1 | 52 | 600 psi @ 215° F | 600 psi @ 215° F | -20° to 400° | Full | 4" | Water, Oil, Argon, Helium, Krypton, Neon, Xenon, Steam | 0000000 | 00000 |
316 Stainless Steel Body—PTFE Plastic Seal | ||||||||||
| 3/8" | __ | Not Rated | 500 psi @ 200° F | __ | 40° to 200° | Standard | 3 9/16" | Water, Oil, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
- Valve Type: Plug
- For Use With: Air, Water
- Valve Type: Ball
- For Use With: Argon, Helium, Krypton, Neon, Oil, Water, Xenon
| For Tube OD | Pipe Size | Max. Pressure | Temperature Range, °F | Port Type | End-to-End Lg. | Each | |
316 Stainless Steel Body—PTFE Plastic Seal | |||||||
|---|---|---|---|---|---|---|---|
| 3/8" | 3/8 | 500 psi @ 200° F | 40° to 200° | Standard | 3 1/4" | 0000000 | 0000000 |
Plastic On/Off Valves with Compression Fittings
- Valve Type: Ball
- For Use With: Air, Argon, Helium, Krypton, Neon, Water, Xenon
- Seal Material: Buna-N Rubber
A compression sleeve bites into tubing as you tighten the nut, forming a strong seal. These valves are full port, so they do not restrict flow.
For technical drawings and 3-D models, click on a part number.
Compression Flow-Control Orifices
- For Use With: Air, Argon, Carbon Dioxide, Helium, Neon, Nitrogen, Oil, Water, Xenon
- Max. Pressure: 4,000 psi @ 70° F
Compression fittings bite down on the outside of hard metal tubing for a secure connection. Also known as flow restrictors and precision orifice valves, these orifices are used to throttle, vent, bleed, or regulate the flow of liquids and gases.
For technical drawings and 3-D models, click on a part number.
Available Orifice Diameters | ||
|---|---|---|
| Orifice Dia. | Water Flow | Air Flow |
| 0.01" | 0.016 gpm @ 40 psi | 0.1 scfm @ 40 psi |
| 0.018" | 0.046 gpm @ 40 psi | 0.2 scfm @ 40 psi |
| 0.021" | 0.061 gpm @ 40 psi | 0.3 scfm @ 40 psi |
| 0.025" | 0.089 gpm @ 40 psi | 0.5 scfm @ 40 psi |
| 0.029" | 0.12 gpm @ 40 psi | 0.6 scfm @ 40 psi |
| 0.035" | 0.177 gpm @ 40 psi | 0.9 scfm @ 40 psi |
| 0.042" | 0.247 gpm @ 40 psi | 1.3 scfm @ 40 psi |
| 0.055" | 0.43 gpm @ 40 psi | 2.2 scfm @ 40 psi |
Flow Transmitters for Air
Calibrated for compressed air, these transmitters send flow-rate readings to data recorders, loggers, and displays. They have compression tube connections that bite down on hard metal and plastic tubing for a secure seal. The digital display shows the flow rate, so these transmitters can also be used as flowmeters. Fittings are 316 stainless steel for corrosion resistance in harsh environments.
For technical drawings and 3-D models, click on a part number.
Output | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tube Connections | End-to-End Lg. | Flow Range | Accuracy | Max. Pressure | Temp. Range, °F | Seal Material | Mounting Orientation | Signal Connection | Signal | Voltage | Plug Type | Each | |
ABS Plastic Body with 316 Stainless Steel | |||||||||||||
Cubic Centimeters per Minute | |||||||||||||
| Male Compression for 1/8" Tube OD | 4 7/8" | 1.08 to 54 cc/min. | ±3% | 150 psi @ 70° F | 32° to 122° | Elastomer Rubber | Horizontal | RS-232 Port | 4 to 20 mA | 120V AC 240V AC | Two Prong | 0000000 | 000000000 |
| Male Compression for 1/8" Tube OD | 4 7/8" | 4 to 200 cc/min. | ±3% | 150 psi @ 70° F | 32° to 122° | Elastomer Rubber | Horizontal | RS-232 Port | 4 to 20 mA | 120V AC 240V AC | Two Prong | 0000000 | 00000000 |
| Male Compression for 1/8" Tube OD | 4 7/8" | 10 to 500 cc/min. | ±3% | 150 psi @ 70° F | 32° to 122° | Elastomer Rubber | Horizontal | RS-232 Port | 4 to 20 mA | 120V AC 240V AC | Two Prong | 0000000 | 00000000 |
Liters per Minute | |||||||||||||
| Male Compression for 1/8" Tube OD | 4 7/8" | 0.02 to 1 lpm | ±3% | 150 psi @ 70° F | 32° to 122° | Elastomer Rubber | Horizontal | RS-232 Port | 4 to 20 mA | 120V AC 240V AC | Two Prong | 0000000 | 00000000 |
| Male Compression for 1/8" Tube OD | 4 7/8" | 0.1 to 5 lpm | ±3% | 150 psi @ 70° F | 32° to 122° | Elastomer Rubber | Horizontal | RS-232 Port | 4 to 20 mA | 120V AC 240V AC | Two Prong | 0000000 | 00000000 |
Plastic Quick-Disconnect Tube Couplings for Air and Water
Lighter in weight than their metal counterparts, these quick-disconnect couplings are plastic. They consist of a plug and a socket that allow you to frequently connect and disconnect your line.
Latch-lock sockets disconnect by pressing the latch.
Acetal plugs and sockets are moisture resistant, so they won’t absorb water and lose strength, even in high-humidity environments. Plug and Sockets with shut-off have a valve to stop the flow when the coupling is separated, so air or water won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
- Temperature Range: -40° to 180° F
- Tubing: Use with nylon plastic or polyethylene plastic, see table for hardness
For Tube | With Shut-Off | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube ID, mm | For Tube OD | Material | Color | Max. Pressure | Hardness Rating | Hardness | Each | |
| 1/8 | 5/16" | __ | 5/32" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 000000 |
| 1/8 | 5/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
| 1/8 | 5/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
| 1/8 | 5/16" | 2 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | __ | __ | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
With Shut-Off | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube OD | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8 | 5/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 19/64" | 00000000 | 000000 |
| 1/4 | 7/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with nylon plastic or polyethylene plastic, see table for hardness
For Tube | With Shut-Off | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Coupling Size | For Plug OD | For Tube ID, mm | For Tube OD | Material | Color | Max. Pressure | Hardness Rating | Hardness | Socket Locking Type | Each | |
| 1/8 | 5/16" | __ | 5/32" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | Latch | 00000000 | 000000 |
| 1/8 | 5/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | Latch | 0000000 | 00000 |
| 1/8 | 5/16" | 2 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | __ | __ | Latch | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | Latch | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | Latch | 0000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
With Shut-Off | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Coupling Size | For Plug OD | For Tube ID, mm | For Tube OD | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Socket Locking Type | Each | |
| 1/8 | 5/16" | __ | 5/32" | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 1/2" | Latch | 00000000 | 000000 |
| 1/8 | 5/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 1/2" | Latch | 0000000 | 00000 |
| 1/8 | 5/16" | 2 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 1/2" | Latch | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 1/2" | Latch | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 1/2" | Latch | 0000000 | 00000 |
Brass Quick-Disconnect Tube Couplings for Air
- Temperature Range: 0° to 180° F
- Tubing: Use with hard polyethylene plastic or polypropylene plastic
An all-brass body gives these quick-disconnect couplings better durability than plastic quick-disconnect couplings. They’re nickel plated for very good corrosion resistance. Couplings consist of a plug and a socket that join with a latch, so you can easily connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch and remove the plug.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so air won’t leak from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Through-wall sockets are also known as bulkhead sockets and panel mount sockets; they mount through your wall or panel to create an inlet or outlet.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Through-wall sockets are also known as bulkhead sockets and panel mount sockets; they mount through your wall or panel to create an inlet or outlet.
High-Pressure Quick-Disconnect Tube Couplings for Air
Not only do these chrome-plated brass couplings have excellent corrosion resistance, they also withstand pressures up to 250 psi. Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch on the socket and remove the plug.
Plugs and Sockets with shut-off have a valve to stop the flow when the coupling is separated, so air won’t leak from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
With Shut-Off | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube OD | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8 | 5/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 1/2" | 19/64" | 00000000 | 000000 |
| 1/4 | 7/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
With Shut-Off | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | For Plug OD | For Tube OD | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8 | 5/16" | 5/32" | Chrome-Plated Brass | 250 psi @ 72° F | 1/2" | 1/2" | 00000000 | 000000 |
| 1/8 | 5/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 1/2" | 1/2" | 00000000 | 00000 |
| 1/4 | 7/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 1/2" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 1/2" | 00000000 | 00000 |
Quick-Disconnect Tube Couplings for Food and Beverage
- Temperature Range:
Acetal Plastic: -40° to 180° F
Polypropylene Plastic: 32° to 160° F - Tubing:
Barbed Fittings: Use with soft or firm (Durometer 65A-80A) polyurethane rubber
Compression Fittings: Use with hard or firm (Durometer 80A-60D) nylon or polyethylene plastic - Specifications Met: NSF/ANSI 169
Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch on the socket and remove the plug. They’re made of FDA-approved materials, including moisture-resistant plastic that won’t absorb liquid and lose strength, even in high-humidity food and beverage applications.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so fluid won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression plugs have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Compression sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Quick-Disconnect Couplings for Plastic Tubing—Gasoline
- Tempearture Range: 0° to 150° F
- Tubing: Use with firm (Durometer 45D) polyethylene or polypropylene plastic, except fittings with male threaded pipe connection
Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch and remove the plug. Plugs and sockets are 316 stainless steel for excellent corrosion resistance.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so gasoline won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression sockets have a sleeve (ferrule) that bites into the tubing and forms a seal when you tighten the nut.
Through-wall sockets are also known as bulkhead sockets and panel-mount sockets; they mount through your wall or panel to create an inlet or outlet.