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.
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About Backflow-Prevention Valves
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Slide-In Threaded On/Off Valves
Control flow in passageways of manifolds and valve mounting blocks without external pipes. Also known as cartridge valves, they slide into unthreaded holes and secure in place with the included set screw. These valves are ideal for testing and sampling applications because you can quickly open and close them with a toggle or button.
Toggle-switch valves stay open until you flip them closed. Since they don’t need to be held open, they’re often used to dispense large samples. The toggle’s position shows you if they’re open or closed.
Push-button valves open when you press the button. When released, the button springs back and automatically stops flow. They’re ideal for intermittent use and controlling flow to avoid spills.
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.
- Valve Type: Stem
- For Use With: Air, Oil, Water
- Seal Material: Buna-N Rubber
Required Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size  | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Valve Starting Position | Return Actuation | Port-to-Port Lg. | Groove Wd. | Dia. | Dp. | Set Screw Included | Each | |
UNF Female × Unthreaded | ||||||||||||
| 10-32 | 0.1 | 125 psi @ 180° F | -25° to 180° | Normally Closed | Manual | 3/8" | 0.147" | 0.437"-0.440" | 1.030" | Yes | 00000000 | 000000 |
UNF Male × Unthreaded | ||||||||||||
| 10-32 | 0.1 | 125 psi @ 180° F | -25° to 180° | Normally Closed | Manual | 5/8" | 0.147" | 0.437"-0.440" | 1.030" | Yes | 00000000 | 00000 |
- Valve Type: Stem
- For Use With: Air, Oil, Water
- Seal Material: Buna-N Rubber
Required Hole | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Valve Starting Position | Return Actuation | Port-to-Port Lg. | Groove Wd. | Dia. | Dp. | Set Screw Included | Each | |
UNF Female × Unthreaded | ||||||||||||
| 10-32 | 0.1 | 125 psi @ 180° F | -25° to 180° | Normally Closed | Spring | 3/8" | 0.147" | 0.437"-0.440" | 1.030" | Yes | 00000000 | 000000 |
UNF Male × Unthreaded | ||||||||||||
| 10-32 | 0.1 | 125 psi @ 180° F | -25° to 180° | Normally Closed | Spring | 5/8" | 0.147" | 0.437"-0.440" | 1.030" | Yes | 00000000 | 00000 |
High-Cycling Check Valves
With internal components that resist wear from frequent operation, these valves can cycle as often as once per second. Barbed fittings and unthreaded fittings grip onto tubing, providing a secure hold. All valves open to allow flow in one direction and close when flow stops or reverses.
Nylon valves are more impact resistant than polypropylene valves.
Polypropylene valves are more corrosion resistant than nylon valves.
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
| For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Unthreaded Male Inlet × Unthreaded Male Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 00000000 | 00000 |
- For Use With: Air, Water
- Diaphragm Material: See table
- Seal Material: See table
| For Tube ID | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | Diaphragm Material | Seal Material | Color | End-to-End Lg. | Each | |
Unthreaded Male Inlet × Unthreaded Male Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluoroelastomer Rubber | Fluoroelastomer Rubber | White | 1 5/8" | 00000000 | 00000 |
| 1/8" | 15 psi @ 70° F | 0.5 | -20° to 250° | Fluorosilicone Rubber | Fluorosilicone Rubber | Black | 1 5/8" | 000000000 | 0000 |
Threaded Two-Stage Backflow-Prevention Valves
- For Use With: Air, Water
- Disc Material: EPDM Rubber
- Seal Material: EPDM Rubber
For maximum protection from system contamination, these valves have two integral check valves with a vent between them. If the primary check valve fails to close when flow stops or reverses, overflow is discharged through the vent and the secondary check valve prevents backflow.
Chrome-plated brass valve is more corrosion resistant than plain brass valves.
Valve with an unthreaded vent is commonly used on laboratory faucets and other applications with intermittent flow. It discharges overflow directly and should not be installed in areas where spillage could cause water damage.
| Pipe Size | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Vent Type | Each | |
Chrome-Plated Brass Body | |||||||
|---|---|---|---|---|---|---|---|
NPT Male Inlet × NPT Female Outlet | |||||||
| 3/8 | 150 psi @ 140° F | 25 | 35° to 140° | 2 3/8" | Unthreaded | 0000000 | 0000000 |
Press-In Flow-Control Orifices
- For Use With: Air, Argon, Carbon Dioxide, Helium, Neon, Nitrogen, Oil, Water, Xenon
- Max. Pressure: 4,000 psi @ 70° F
Press these orifices into machined holes in connectors, manifolds, and other custom parts. They’re also known as flow restrictors and precision orifice valves. Use them to throttle, vent, bleed, or regulate the flow of water, oil, and inert gas.
Available Orifice Diameters | ||
|---|---|---|
| Orifice Dia. | Water Flow | Air Flow |
| 0.01" | 0.016 gpm @ 40 psi | 4.7 scfh @ 40 psi |
| 0.018" | 0.046 gpm @ 40 psi | 13.2 scfh @ 40 psi |
| 0.021" | 0.061 gpm @ 40 psi | 17.8 scfh @ 40 psi |
| 0.025" | 0.089 gpm @ 40 psi | 27.5 scfh @ 40 psi |
| 0.029" | 0.12 gpm @ 40 psi | 37.1 scfh @ 40 psi |
| 0.035" | 0.177 gpm @ 40 psi | 52.5 scfh @ 40 psi |
| 0.042" | 0.247 gpm @ 40 psi | 76.9 scfh @ 40 psi |
| 0.055" | 0.43 gpm @ 40 psi | 132 scfh @ 40 psi |
| Lg. | OD | For Hole Dia. | Each | |
303 Stainless Steel Body | ||||
|---|---|---|---|---|
| 1/8" | 1/4" | 0.257" | 0000000 | 000000 |
Gas Mixers
Supply the right amount of air and gas to burners. These mixers slip over the end of a burner pipe and attach with the included set screw. All have adjustable air openings. To choose your mixer and valve, determine the size of your burner pipe and gas input connection. Select about measuring pipe for more information.
Connect one end of a mixing valve to the mixer and thread the other end into your gas line.
Gas Mixers | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Outlet | Inlet | Mixing Valves | |||||||
| Pipe Size | Gender | Pipe Size | Thread Type | Gender | Material | Each | Each | ||
Threaded Inlet | |||||||||
| 1/2 | Female | 1/4 | NPT | Female | Iron | 0000000 | 0000000 | 0000000 | 000000 |
| 3/4 | Female | 1/4 | NPT | Female | Iron | 0000000 | 000000 | 0000000 | 00000 |
| 1 | Female | 1/4 | NPT | Female | Iron | 0000000 | 000000 | 0000000 | 00000 |
| 1 1/4 | Female | 1/4 | NPT | Female | Iron | 0000000 | 000000 | 0000000 | 00000 |
Unthreaded Inlet | |||||||||
| 1 | Female | 5/8 | __ | Female | Iron | 000000 | 000000 | 000000 | 000000 |
| 1 1/4 | Female | 5/8 | __ | Female | Iron | 000000 | 000000 | 000000 | 000000 |
| 1 1/2 | Female | 5/8 | __ | Female | Iron | 000000 | 000000 | 000000 | 000000 |
Plastic Drum Faucets
Primarily used on drums, these faucets can also be used on tanks, carboys, and other containers.
Style B has a vent, so it can be used with ventless drums.
Style C can be used with a thread adapter to connect to a drum with a 2” Buttress or Mauser thread.
Inlet | Outlet | |||||||
|---|---|---|---|---|---|---|---|---|
| Style | Wetted Parts Material | Color | Pipe Size | Gender | OD | Max. Temp., °F | Each | |
Polyethylene Plastic | ||||||||
| A | Polyethylene Plastic | Semi-Clear White | 3/4 NPT | Male | 7/8" | 140° | 000000 | 00000 |
| B | Polyethylene Plastic, Polypropylene Plastic, Natural Rubber | Red | 3/4 NPT | Male | 7/8" | 180° | 0000000 | 0000 |
| C | Polyethylene Plastic, EPDM Rubber | Brown | 2 NPT | Male | 2 1/4" | 140° | 000000 | 00000 |
| D | Polyethylene Plastic, PTFE Plastic | Semi-Clear White | 1/2 NPT | Male | 5/8" | 175° | 000000 | 00000 |
| D | Polyethylene Plastic, PTFE Plastic | Semi-Clear White | 3/4 NPT | Male | 5/8" | 175° | 000000 | 00000 |
Metal Drum Faucets
All of these faucets are primarily used on drums, but can also be used on tanks, carboys, and other containers. If your drum has a 2" Buttress or Mauser thread, use drum thread adapters to attach drum faucets with pipe size 2 NPT threads.
Style C has a locknut with a rubber gasket that allows you to position the spigot in any direction. The locknut also provides a tight seal, even on drums with oversized or damaged threads.
Inlet | ||||||||
|---|---|---|---|---|---|---|---|---|
| Style | Wetted Parts Material | Pipe Size | Gender | Outlet OD | Lock Type | For Max. Shackle Dia. | Each | |
| A | Iron, Brass | 3/4 NPT | Male | 3/4" | Padlockable | 5/16" | 000000 | 000000 |
| A | Iron, Brass | 1 1/2 NPT | Male | 1 1/2" | Padlockable | 5/16" | 000000 | 00000 |
| A | Iron, Brass | 2 NPT | Male | 1 3/4" | Padlockable | 5/16" | 000000 | 00000 |
| A | Iron, Brass | 3 NPT | Male | 2 3/8" | __ | __ | 000000 | 000000 |
| B | Iron, Brass | 2 NPT | Male | 1 3/4" | Padlockable | 5/16" | 0000000 | 00000 |
| B | Iron, Brass | 3 NPT | Male | 2 3/8" | __ | __ | 0000000 | 000000 |
| B | Iron, Brass | 4 NPT | Male | 4" | __ | __ | 000000 | 000000 |
| C | Iron, Brass | 2 NPT | Male | 1 3/4" | Padlockable | 5/16" | 0000000 | 00000 |
Food Industry Self-Closing Drum Faucets
Push or pull the faucet handle to open; release the handle and the faucet automatically shuts off. These drum faucets meet NSF/ANSI 169 for special-purpose food equipment.
Inlet | ||||||||
|---|---|---|---|---|---|---|---|---|
| Wetted Parts Material | Color | Thread Size | Gender | Outlet OD | Max. Temp., °F | Specifications Met | Each | |
Polypropylene Plastic | ||||||||
| Polypropylene Plastic, Silicone Rubber | Black | 5/8"-18 UNF | Male | 5/8" | 170° | NSF/ANSI 169 | 0000000 | 000000 |
Self-Closing Drum Faucets
Push or pull the faucet handle to open; release the handle and the faucet automatically shuts off. These faucets are primarily used on drums, but can also be used on tanks, carboys, and other containers.
In case of fire, faucets with a flame arrester prevent flashback into the drum.
Inlet | Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Style | Wetted Parts Material | Pipe Size | Gender | OD | Lock Type | For Max. Shackle Dia. | Specifications Met | Features | Each | |
Zinc | ||||||||||
| A | Zinc, Acetal Plastic | 3/4 NPT | Male | 3/4" | Padlockable | 9/32" | __ | __ | 0000000 | 000000 |
| A | Zinc, 304 Stainless Steel, Acetal Plastic | 3/4 NPT | Male | 3/4" | Padlockable | 9/32" | __ | Flame Arrester | 0000000 | 00000 |
Brass | ||||||||||
| C | Brass, 302 Stainless Steel, PTFE Plastic, Buna-N Rubber | 3/4 NPT | Male | 3/4" | Padlockable | 3/8" | UL Listed | __ | 0000000 | 000000 |
Drum Faucets for Viscous Liquids
Use these faucets with fluids at least as thick as motor oil.
Style B can be used with a thread adapter to connect to a drum with a 2” Buttress or Mauser thread.
Inlet | Outlet | ||||||
|---|---|---|---|---|---|---|---|
| Style | Wetted Parts Material | Pipe Size | Gender | OD | Specifications Met | Each | |
Brass | |||||||
| B | Brass, 304 Stainless Steel, PTFE Plastic | 2 NPT | Male | 1 5/8" | FM Approved | 000000 | 0000000 |
Drum Faucets with Liquid-Level Gauge
The gauge provides an instant visual check of liquid levels in your drum without interfering with the use of the faucet.
Inlet | ||||||||
|---|---|---|---|---|---|---|---|---|
| Wetted Parts Material | Pipe Size | Gender | Outlet OD | Max. Temp., °F | Lock Type | For Max. Shackle Dia. | Each | |
Brass | ||||||||
| Aluminum, Brass, Buna-N Rubber, Glass, Zinc-Plated Iron | 3/4 NPT | Male | 7/8" | 225° | Padlockable | 9/32" | 000000 | 0000000 |