Compression Flow Controls

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	Connection Style Connection Style	Show

	Compression

	Connection Style Connection Style	Hide

	System of Measurement System of Measurement

Inch

	For Tube OD For Tube OD

	Pipe Size Pipe Size

1/8

1/4

3/8

	Connection Type Connection Type


Pipe	Tube

	For Use With For Use With

	Body Material Body Material

Brass

Plastic

Stainless Steel

	Gender Gender

Female

Male

	Maximum Pressure Maximum Pressure

	Shape Shape


90° Elbow	Straight

	Valve Type Valve Type

	Handle Style Handle Style


Lever	T-Handle

	Maximum Flow Maximum Flow

	Orifice Diameter Orifice Diameter

	Thread Type Thread Type

NPT

NPTF

	Thread Size Thread Size

7/16"-20

9/16"-20

5/8"-20

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

-49° to 0° F

25° F or greater

Not Rated

	Overall Length Overall Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Minimum Flow Minimum Flow

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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26 Products

About On/Off Valves

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.

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.

About Precision Flow-Adjustment Valves

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.

Brass Body

Valve Type: Needle
For Use With: Air
Seal Material: Neoprene Rubber

NPTF Male × Compression
Pipe Size	For Tube OD	Max. Pressure	Temperature Range, °F	Port-to-Port Lg.		Each
1/8	1/4"	150 psi @ 250° F	-45° to 250°	7/8"	000000	00000
1/8	5/16"	150 psi @ 250° F	-45° to 250°	7/8"	000000	00000
1/4	3/8"	150 psi @ 250° F	-45° to 250°	15/16"	000000	00000

Brass Body—Neoprene Rubber Packing

Valve Type: Needle
For Use With: Air
Seal Material: Neoprene Rubber

Compression × Compression
For Tube OD	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
1/4"	150 psi @ 70° F	-45° to 250°	1 3/4"	0000000	000000
3/8"	150 psi @ 70° F	-45° to 250°	1 15/16"	0000000	00000

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.

Compression × Compression

Valve Type:
Brass Seal: Plug
All Other Valves: Ball
For Use With: See table

Brass Body—Brass Seal
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
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

Compression × NPTF Female

Valve Type: Plug
For Use With: Air, Water

Brass Body—Brass Seal
For Tube OD	Pipe Size	Max. Pressure	Temperature Range, °F	Port Type	End-to-End Lg.		Each
1/4"	1/8	30 psi @ 125° F	35° to 125°	Standard	2 5/16"	000000	000000
1/4"	1/4	30 psi @ 125° F	35° to 125°	Standard	2 3/16"	000000	00000
3/8"	1/4	30 psi @ 125° F	35° to 125°	Standard	2 1/4"	000000	00000

Compression × NPT Male

Valve Type: Ball
For Use With: Argon, Helium, Krypton, Neon, Oil, Water, Xenon

316 Stainless Steel Body—PTFE Plastic Seal
For Tube OD	Pipe Size	Max. Pressure	Temperature Range, °F	Port Type	End-to-End Lg.		Each
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.

Dark Gray PVC Plastic Body
Pipe Size	Thread Size	For Tube OD	Flow Coefficient (Cv)	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
NPT Female × Compression
1/4	5/8"-20	1/4"	0.7	125 psi @ 140° F	35° to 140°	2 7/8"	00000000	00000
1/4	5/8"-20	3/8"	2.7	125 psi @ 140° F	35° to 140°	2 15/16"	00000000	0000

Compression Flow-Control Orifices

NPT Male × Compression

Compression × Compression

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

		Connection
Pipe Size	Thread Size	For Tube OD	Lg.		Each
316 Stainless Steel Body
NPT Male × Compression
1/4	7/16"-20	1/4"	1 1/2"	0000000	000000
3/8	9/16"-20	1/4"	1 1/2"	0000000	00000
Compression × Compression
__	__	3/16"	1 1/2"	0000000	00000
__	__	1/4"	1 5/8"	0000000	00000

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.

								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 to 50 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