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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High-Pressure Threaded Precision Flow-Adjustment Manifolds
- Valve Type: Needle
- For Use With: See table
- Seal Material: Fluoroelastomer Rubber
Often attached to differential pressure gauges to measure liquid level in tanks, these manifolds have two isolation valves with a pressure-equalizing valve between them. To isolate your differential pressure gauge for maintenance or calibration, shut off flow on both sides and equalize pressure in the manifold. All manifolds 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 manifold 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 manifold 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 | |
Nickel-Plated and Zinc-Plated 316 Stainless Steel Body—Metal-to-Metal Seat | ||||||
|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||
| 1/2 | 0.44 | 10000 psi @ 200° F | 2 7/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 0000000 |
Nickel-Plated and Zinc-Plated 316 Stainless Steel Body—Bubble-Tight Soft Seat | ||||||
NPT Female × NPT Female | ||||||
| 1/2 | 0.76 | 6000 psi @ 200° F | 2 7/8" | Water, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
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.
Low-Temperature/High-Pressure D.O.T. Push-to-Connect Tube Fittings for Air
- Temperature Range: -40° to 200° F
- Tubing: Use with hard (Durometer 65D) nylon plastic
- Specifications Met:
Cartridges: D.O.T. FMVSS 571, SAE J2494-4, SAE J1131
All other fittings: D.O.T. FMVSS 571
Connect high-pressure brake lines with fittings that won’t crack in frigid temperatures. Often used on commercial trucks and trailers, these fittings meet Department of Transportation FMVSS 571 safety standards. Also known as instant fittings, they connect to tubing with a simple push, and an internal gripping ring and O-ring will hold the tubing tight. A built-in tube support slips inside the tubing to prevent it from collapsing. To disconnect, push on the release ring and pull the tubing out of the fitting. All have good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Plugs insert into the push-to-connect end of another fitting.
Connectors | Plugs | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Inlets | For Tube OD (Inlet) | Number of Outlets | For Tube OD (Outlet) | Material | Color | Release Ring Material | Max. Pressure | Each | Each | ||
| 2 | 1/4" | 4 | 1/4" | Nylon Plastic | Black | Brass | 250 psi @ 72° F | 00000000 | 000000 | 0000000 | 00000 |
| 2 | 3/8" | 4 | 3/8" | Nylon Plastic | Black | Brass | 250 psi @ 72° F | 00000000 | 000000 | 0000000 | 0000 |
| 2 | 1/2" | 4 | 1/2" | Nylon Plastic | Black | Brass | 250 psi @ 72° F | 00000000 | 000000 | 0000000 | 0000 |
