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 Precision Flow-Adjustment Valves
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About On/Off Valves
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Threaded Precision Flow-Adjustment Valves with Gauge Ports
- Valve Type: Needle
- For Use With: See table
- Seal Material: Fluoroelastomer Rubber
With a gauge port on each side of these valves, you can install two pieces of instrumentation equipment to simultaneously monitor multiple media properties without interrupting flow. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. Valves have a 316 stainless steel body for excellent corrosion resistance.
Metal-to-metal seats resist temperature fluctuations.
Bubble-tight soft seats provide a tighter seal than metal-to-metal seats when the valve is completely closed.
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.
Gauge Ports | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | No. of | Pipe Size  | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | End-to-End Lg. | For Use With | Each | |
Steel Body—Metal-to-Metal Seat | ||||||||||
NPT Male × NPT Female | ||||||||||
| 1/2 × 1/2 | 2 | 1/2 | Female | NPT | 0.44 | 10000 psi @ 200° F | 5 3/8" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 0000000 |
| 3/4 × 1/2 | 2 | 1/2 | Female | NPT | 0.44 | 10000 psi @ 200° F | 5 3/8" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
Steel Body—Bubble-Tight Soft Seat | ||||||||||
NPT Male × NPT Female | ||||||||||
| 1/2 × 1/2 | 2 | 1/2 | Female | NPT | 0.64 | 6000 psi @ 200° F | 5 3/8" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 3/4 × 1/2 | 2 | 1/2 | Female | NPT | 0.64 | 6000 psi @ 200° F | 5 3/8" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
316 Stainless Steel Body—Metal-to-Metal Seat | ||||||||||
NPT Male × NPT Female | ||||||||||
| 1/2 × 1/2 | 2 | 1/2 | Female | NPT | 0.44 | 10000 psi @ 200° F | 5 3/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 3/4 × 1/2 | 2 | 1/2 | Female | NPT | 0.44 | 10000 psi @ 200° F | 5 3/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
316 Stainless Steel Body—Bubble-Tight Soft Seat | ||||||||||
NPT Male × NPT Female | ||||||||||
| 1/2 × 1/2 | 2 | 1/2 | Female | NPT | 0.64 | 6000 psi @ 200° F | 5 3/8" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 3/4 × 1/2 | 2 | 1/2 | Female | NPT | 0.64 | 6000 psi @ 200° F | 5 3/8" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
Threaded Precision Flow-Adjustment Valves with Vent Port
- Valve Type: Needle
- For Use With: See table
- Seal Material: Fluoroelastomer Rubber
Also known as block and bleed valves, these have a vent port that allows you to remove instrumentation equipment attached to the valve without depressurizing your line. Turn the handle to shut off flow and remove the vent port plug to drain liquid trapped in the valve. Valves adjust flow in small increments for metering, sampling, and other applications requiring fine flow control.
316 stainless steel valves are more corrosion resistant than steel valves.
Metal-to-metal seats resist temperature fluctuations.
Bubble-tight soft seats provide a tighter seal than metal-to-metal seats when the valve is completely closed.
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.
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | End-to-End Lg. | For Use With | Each | |
316 Stainless Steel Body—Metal-to-Metal Seat | ||||||
|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||
| 1/4 | 0.44 | 10000 psi @ 200° F | 2 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 0000000 |
| 1/2 | 0.44 | 10000 psi @ 200° F | 2 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
NPT Female × NPT Male | ||||||
| 1/4 | 0.44 | 10000 psi @ 200° F | 3 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 1/2 | 0.44 | 10000 psi @ 200° F | 3 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
316 Stainless Steel Body—Bubble-Tight Soft Seat | ||||||
NPT Female × NPT Female | ||||||
| 1/4 | 0.76 | 6000 psi @ 200° F | 2 1/2" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 1/2 | 0.76 | 6000 psi @ 200° F | 2 1/2" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
NPT Female × NPT Male | ||||||
| 1/4 | 0.76 | 6000 psi @ 200° F | 3 1/2" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| 1/2 | 0.76 | 6000 psi @ 200° F | 3 1/2" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
Carbon Steel Body—Metal-to-Metal Seat | ||||||
NPT Female × NPT Female | ||||||
| 1/4 | 0.44 | 10000 psi @ 200° F | 2 1/2" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
| 1/2 | 0.44 | 10000 psi @ 200° F | 2 1/2" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
NPT Female × NPT Male | ||||||
| 1/4 | 0.44 | 10000 psi @ 200° F | 3 1/2" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
| 1/2 | 0.44 | 10000 psi @ 200° F | 3 1/2" | Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
Carbon Steel Body—Bubble-Tight Soft Seat | ||||||
NPT Female × NPT Female | ||||||
| 1/4 | 0.76 | 6000 psi @ 200° F | 2 1/2" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
| 1/2 | 0.76 | 6000 psi @ 200° F | 2 1/2" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
NPT Female × NPT Male | ||||||
| 1/4 | 0.76 | 6000 psi @ 200° F | 3 1/2" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
| 1/2 | 0.76 | 6000 psi @ 200° F | 3 1/2" | Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 00000 |
High-Pressure Threaded Precision Flow-Adjustment Valves with Vent Ports
- Valve Type: Needle
- For Use With: Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon
Also known as block and bleed valves, these have two vent ports to isolate pressure gauges, switches, and other components in high-pressure systems for maintenance, calibration, and sampling without interrupting the process. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. All valves have metal-to-metal seats that resist temperature fluctuations. Body is 316 stainless steel for excellent corrosion resistance. Valves have a nut that can be tightened to compress the packing if it leaks.
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.
Threaded On/Off Valves with Gauge Port
- Valve Type: Ball
- For Use With: Air, Water
- Seal Material: Fluoroelastomer Rubber
- Specifications Met: C-UL Listed, CSA Certified, CSA-US Certified, UL Listed
Attach a pressure gauge to the side port on these valves. The side port can also be used to drain and divert liquid. Valves are full port, so they do not 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.
Gauge Port | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Vacuum Rating, in. of Hg | End-to-End Lg. | Each | |
NPT Female × NPT Female | ||||||||||
| 1/2 | 1/4 | Female | NPT | 46 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 9/16" | 0000000 | 000000 |
| 3/4 | 1/4 | Female | NPT | 66 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 3/4" | 0000000 | 00000 |
| 1 | 1/4 | Female | NPT | 93 | 600 psi @ 100° F | -40° to 350° | 29.9 | 3 7/16" | 0000000 | 00000 |
| 1 1/4 | 1/4 | Female | NPT | 130 | 600 psi @ 100° F | -40° to 350° | 29.9 | 3 7/8" | 0000000 | 00000 |
| 1 1/2 | 1/4 | Female | NPT | 290 | 600 psi @ 100° F | -40° to 350° | 29.9 | 4 1/4" | 0000000 | 00000 |
| 2 | 1/4 | Female | NPT | 420 | 600 psi @ 100° F | -40° to 350° | 29.9 | 5" | 0000000 | 000000 |
Gauge Port | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Vacuum Rating, in. of Hg | End-to-End Lg. | Each | |
NPT Female × NPT Female | ||||||||||
| 1/2 | 1/4 | Female | NPT | 23 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 9/16" | 00000000 | 000000 |
| 3/4 | 1/4 | Female | NPT | 39 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 3/4" | 00000000 | 00000 |
| 1 | 1/4 | Female | NPT | 80 | 600 psi @ 100° F | -40° to 350° | 29.9 | 3 7/16" | 00000000 | 00000 |
| 1 1/4 | 1/4 | Female | NPT | 90 | 600 psi @ 100° F | -40° to 350° | 29.9 | 3 7/8" | 00000000 | 00000 |
| 1 1/2 | 1/4 | Female | NPT | 150 | 600 psi @ 100° F | -40° to 350° | 29.9 | 4 1/4" | 00000000 | 00000 |
| 2 | 1/4 | Female | NPT | 200 | 600 psi @ 100° F | -40° to 350° | 29.9 | 5" | 00000000 | 000000 |
Gauge Port | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Vacuum Rating, in. of Hg | End-to-End Lg. | Each | |
NPT Female × NPT Female | ||||||||||
| 1/2 | 1/4 | Female | NPT | 23 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 9/16" | 00000000 | 000000 |
| 3/4 | 1/4 | Female | NPT | 39 | 600 psi @ 100° F | -40° to 350° | 29.9 | 2 3/4" | 00000000 | 00000 |
| 1 | 1/4 | Female | NPT | 80 | 600 psi @ 100° F | -40° to 350° | 29.9 | 3 7/16" | 00000000 | 00000 |
| 1 1/2 | 1/4 | Female | NPT | 150 | 600 psi @ 100° F | -40° to 350° | 29.9 | 4 1/4" | 00000000 | 00000 |
Threaded Isolation On/Off Valves for Chemicals
- Valve Type: Ball
- For Use With: Acetone, Air, Ammonia, Argon, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Fuel Oil, Gasoline, Helium, Isopropyl Alcohol, Kerosene, Krypton, Methanol, Neon, Xenon, Xylene
- Ball Material: 316 Stainless Steel
- Seal Material: PTFE Plastic
- Seat Material: PEEK Plastic
- Specifications Met: ASME B16.34
Attach gauges or sensors to these valves so you can remove them for maintenance and calibration without depressurizing your line. Also known as block and bleed valves, turn the handles to block both upstream and downstream flow, drain the liquid trapped in the valve through the bleed port, and then remove your instrument from the gauge port. Often used in chemical-processing lines, these valves have a PTFE seal and a corrosion-resistant 316 stainless steel body. All are standard port, so they 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.
Gauge Port | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pipe Size | Gender | Thread Type | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Each | |
316 Stainless Steel Body | ||||||||
NPT Female × NPT Female | ||||||||
| 1/2 | 1/4 | Female | NPT | 6.4 | 10000 psi @ 170° F | -65° to 450° | 0000000 | 0000000 |
Quick-Disconnect Hose Couplings for Pressure Testing
Add quick connection points for mechanical gauges and other diagnostic equipment to your line. These couplings are also known as test ports and diagnostic couplings. To take a reading, connect a socket to your gauge using a hose assembly. Then push the socket into a plug that’s permanently threaded into a test port on your line. No threading or unthreading is necessary. Add additional plugs to your line to take measurements at different points. To quickly move the gauge to a different test port, pull back the sleeve on the socket to disengage.
A complete coupling consists of a plug and socket (both sold separately). The plug and socket both have a shut-off valve to stop flow when the coupling is separated, so they're sometimes called double shut-off couplings. They meet ISO 15171-1, which is an international standard for dimensional and performance standards of flat-face diagnostic push-to-connect couplings.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size. Pressure ratings are given for static (constant) pressure conditions.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 6,000 psi @ 72° F
- Maximum Vacuum: 27.4 in. of Hg @ 72° F
- Temperature Range: -40° to 250° F
- Compatible With: Parker PD-Series, Eaton/Aeroquip FD90, Faster DF
- Specifications Met: ISO 15171-1, SAE J1502
Plugs are also known as nipples.
- Maximum Pressure: 6,000 psi @ 72° F
- Maximum Vacuum: 27.4 in. of Hg @ 72° F
- Temperature Range: -40° to 250° F
- Compatible With: Parker PD-Series, Eaton/Aeroquip FD90, Faster DF
- Specifications Met: ISO 15171-1, SAE J1502
Plugs are also known as nipples.
- Maximum Pressure: 6,000 psi @ 72° F
- Maximum Vacuum: 27.4 in. of Hg @ 72° F
- Temperature Range: -40° to 250° F
- Compatible With: Parker PD-Series, Eaton/Aeroquip FD90, Faster DF
- Specifications Met: ISO 15171-1, SAE J1502
Plugs are also known as nipples.
UN/UNF (SAE Straight) male threads have a gasket to prevent leaks. They’re also known as O-ring boss threads.
- Maximum Pressure: 6,000 psi @ 72° F
- Maximum Vacuum: 27.4 in. of Hg @ 72° F
- Temperature Range: -40° to 250° F
- Compatible With: Parker PD-Series, Eaton/Aeroquip FD90, Faster DF
- Specifications Met: ISO 15171-1, SAE J1502
Push-to-connect sockets form a coupling when you push the plug into the socket and hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.
- Maximum Pressure: 6,000 psi @ 72° F
- Maximum Vacuum: 27.4 in. of Hg @ 72° F
- Temperature Range: -40° to 250° F
- Compatible With: Parker PD-Series, Eaton/Aeroquip FD90, Faster DF
- Specifications Met: ISO 15171-1, SAE J1502
Push-to-connect sockets form a coupling when you push the plug into the socket and hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.
For Plug Tip | |||||||
|---|---|---|---|---|---|---|---|
| Coupling Size | Overall Lg. | Lg. | Dia. | Pipe Size | Dash Size | Each | |
Steel | |||||||
| 1/8 | 2 1/4" | 3/16" | 1/2" | 1/4 | 04 | 0000000 | 000000 |