Orifice Valve Tube Fittings

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	Valve Type Valve Type	Show

Orifice

	Valve Type Valve Type	Hide

	Connection Style Connection Style


Threaded	Push to Connect

Barbed

	For Use With For Use With

	Connection Type Connection Type


Tube	Pipe

	System of Measurement System of Measurement

Inch

	For Tube OD For Tube OD

1/4"

3/8"

1/2"

	Body Material Body Material

Plastic

Brass

Stainless Steel

	Pipe Size Pipe Size

1/8

1/4

	Thread Type Thread Type

NPT

	Gender Gender

Female

Male

	Orifice Type Orifice Type

Adapter

Connector

	Hex Width Hex Width

	Maximum Pressure Maximum Pressure

125 psi @ 70° F

500 psi @ 70° F

Not Rated

	For Tube ID For Tube ID

	Maximum Temperature Maximum Temperature

200° to 249° F

500° to 999° F

Not Rated

	Minimum Temperature Minimum Temperature

-49° to 0° F

Not Rated

	Length Length

	Color Color

	White
	Gray

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Orifice Diameter Orifice Diameter

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

REACH Compliant

	OD OD

11 Products

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.

NPT Male × Push to Connect

Push to Connect × Push to Connect

Push tubing into these orifices, and an internal ring holds them in place. They're for use with plastic and soft metal tubing. Also known as flow restrictors and precision orifice valves, they 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.

Acetal Plastic Body

For Use With: Air, Water
Max. Pressure: Not Rated

Available Orifice Diameters
Orifice Dia.	Water Flow	Air Flow
0.01"	0.016 gpm @ 40 psi	0.1 scfm @ 40 psi
0.016"	0.035 gpm @ 40 psi	0.2 scfm @ 40 psi
0.018"	0.046 gpm @ 40 psi	0.2 scfm @ 40 psi
0.02"	0.056 gpm @ 40 psi	0.3 scfm @ 40 psi
0.021"	0.061 gpm @ 40 psi	0.3 scfm @ 40 psi
0.023"	0.076 gpm @ 40 psi	0.4 scfm @ 40 psi
0.024"	0.082 gpm @ 40 psi	0.4 scfm @ 40 psi
0.025"	0.089 gpm @ 40 psi	0.5 scfm @ 40 psi
0.026"	0.101 gpm @ 40 psi	0.5 scfm @ 40 psi
0.028"	0.114 gpm @ 40 psi	0.6 scfm @ 40 psi
0.029"	0.12 gpm @ 40 psi	0.6 scfm @ 40 psi
0.032"	0.152 gpm @ 40 psi	0.7 scfm @ 40 psi
0.033"	0.158 gpm @ 40 psi	0.8 scfm @ 40 psi
0.035"	0.177 gpm @ 40 psi	0.9 scfm @ 40 psi
0.038"	0.202 gpm @ 40 psi	1.1 scfm @ 40 psi
0.04"	0.228 gpm @ 40 psi	1.2 scfm @ 40 psi
0.042"	0.247 gpm @ 40 psi	1.3 scfm @ 40 psi
0.047"	0.304 gpm @ 40 psi	1.6 scfm @ 40 psi
0.052"	0.373 gpm @ 40 psi	2 scfm @ 40 psi
0.055"	0.43 gpm @ 40 psi	2.2 scfm @ 40 psi
0.063"	0.557 gpm @ 40 psi	2.8 scfm @ 40 psi
1/8"	2.34 gpm @ 40 psi	11.9 scfm @ 40 psi

NPT Male × Push to Connect
Pipe Size	For Tube OD	Lg.		Each
1/8	1/4"	1 1/16"	0000000	000000
1/4	1/4"	1 1/8"	0000000	00000

Push to Connect × Push to Connect
For Tube OD	Lg.		Each
1/4"	1 3/8"	0000000	000000
3/8"	1 5/8"	0000000	00000
1/2"	2"	0000000	00000

Brass Body

For Use With: Air, Oil, Water
Max. Pressure: Not Rated

Available Orifice Diameters
Orifice Dia.	Water Flow	Air Flow
0.01"	0.016 gpm @ 40 psi	0.1 scfm @ 40 psi
0.016"	0.035 gpm @ 40 psi	0.2 scfm @ 40 psi
0.018"	0.046 gpm @ 40 psi	0.2 scfm @ 40 psi
0.02"	0.056 gpm @ 40 psi	0.3 scfm @ 40 psi
0.021"	0.061 gpm @ 40 psi	0.3 scfm @ 40 psi
0.023"	0.076 gpm @ 40 psi	0.4 scfm @ 40 psi
0.024"	0.082 gpm @ 40 psi	0.4 scfm @ 40 psi
0.025"	0.089 gpm @ 40 psi	0.5 scfm @ 40 psi
0.026"	0.101 gpm @ 40 psi	0.5 scfm @ 40 psi
0.028"	0.114 gpm @ 40 psi	0.6 scfm @ 40 psi
0.029"	0.12 gpm @ 40 psi	0.6 scfm @ 40 psi
0.032"	0.152 gpm @ 40 psi	0.7 scfm @ 40 psi
0.033"	0.158 gpm @ 40 psi	0.8 scfm @ 40 psi
0.035"	0.177 gpm @ 40 psi	0.9 scfm @ 40 psi
0.038"	0.202 gpm @ 40 psi	1.1 scfm @ 40 psi
0.04"	0.228 gpm @ 40 psi	1.2 scfm @ 40 psi
0.042"	0.247 gpm @ 40 psi	1.3 scfm @ 40 psi
0.047"	0.304 gpm @ 40 psi	1.6 scfm @ 40 psi
0.052"	0.373 gpm @ 40 psi	2 scfm @ 40 psi
0.055"	0.43 gpm @ 40 psi	2.2 scfm @ 40 psi
0.063"	0.557 gpm @ 40 psi	2.8 scfm @ 40 psi

NPT Male × Push to Connect
Pipe Size	For Tube OD	Lg.		Each
1/4	1/4"	15/16"	0000000	000000

Barbed Flow-Control Orifices

NPT Male × Barbed

Barbed × Barbed

Insert the barbed ends of these orifices into rubber and soft plastic tubing, and secure them with a clamp. Also known as flow restrictors and precision orifice valves, they 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.

Nylon Plastic Body

For Use With: Air, Water
Max. Pressure: 125 psi @ 70° F
Temperature Range: -40° to 200° F

Available Orifice Diameters
Orifice Dia.	Water Flow	Air Flow
0.01"	0.016 gpm @ 40 psi	0.1 scfm @ 40 psi
0.016"	0.035 gpm @ 40 psi	0.2 scfm @ 40 psi
0.018"	0.046 gpm @ 40 psi	0.2 scfm @ 40 psi
0.02"	0.056 gpm @ 40 psi	0.3 scfm @ 40 psi
0.021"	0.061 gpm @ 40 psi	0.3 scfm @ 40 psi
0.023"	0.076 gpm @ 40 psi	0.4 scfm @ 40 psi
0.024"	0.082 gpm @ 40 psi	0.4 scfm @ 40 psi
0.025"	0.089 gpm @ 40 psi	0.5 scfm @ 40 psi
0.026"	0.101 gpm @ 40 psi	0.5 scfm @ 40 psi
0.028"	0.114 gpm @ 40 psi	0.6 scfm @ 40 psi
0.029"	0.12 gpm @ 40 psi	0.6 scfm @ 40 psi
0.032"	0.152 gpm @ 40 psi	0.7 scfm @ 40 psi
0.033"	0.158 gpm @ 40 psi	0.8 scfm @ 40 psi
0.035"	0.177 gpm @ 40 psi	0.9 scfm @ 40 psi
0.038"	0.202 gpm @ 40 psi	1.1 scfm @ 40 psi
0.04"	0.228 gpm @ 40 psi	1.2 scfm @ 40 psi
0.042"	0.247 gpm @ 40 psi	1.3 scfm @ 40 psi
0.047"	0.304 gpm @ 40 psi	1.6 scfm @ 40 psi
0.052"	0.373 gpm @ 40 psi	2 scfm @ 40 psi
0.055"	0.43 gpm @ 40 psi	2.2 scfm @ 40 psi
0.063"	0.557 gpm @ 40 psi	2.8 scfm @ 40 psi
0.125"	2.34 gpm @ 40 psi	11.9 scfm @ 40 psi

NPT Male × Barbed
Pipe Size	For Tube ID	Lg.		Each
1/8	1/8"	1 1/16"	0000000	00000
1/4	3/16"	1 1/4"	0000000	00000
1/4	1/4"	1 3/8"	0000000	0000
1/4	3/8"	1 13/16"	0000000	0000

303 Stainless Steel Body

For Use With: Air, Argon, Coolant, Diesel Fuel, Gasoline, Mineral Oils, Natural Gas, Oil, Oxygen, Steam, Water
Max. Pressure: 500 psi @ 70° F
Temperature Range: Not Rated to 500° F

Available Orifice Diameters
Orifice Dia.	Water Flow	Air Flow
0.01"	0.016 gpm @ 40 psi	0.3 scfm @ 40 psi
0.016"	0.035 gpm @ 40 psi	0.5 scfm @ 40 psi
0.018"	0.046 gpm @ 40 psi	0.6 scfm @ 40 psi
0.02"	0.056 gpm @ 40 psi	0.6 scfm @ 40 psi
0.021"	0.061 gpm @ 40 psi	0.7 scfm @ 40 psi
0.023"	0.076 gpm @ 40 psi	0.7 scfm @ 40 psi
0.024"	0.082 gpm @ 40 psi	0.7 scfm @ 40 psi
0.025"	0.089 gpm @ 40 psi	0.8 scfm @ 40 psi
0.026"	0.101 gpm @ 40 psi	0.8 scfm @ 40 psi
0.028"	0.114 gpm @ 40 psi	0.9 scfm @ 40 psi
0.029"	0.12 gpm @ 40 psi	0.9 scfm @ 40 psi
0.032"	0.152 gpm @ 40 psi	1.1 scfm @ 40 psi
0.033"	0.158 gpm @ 40 psi	1.1 scfm @ 40 psi
0.035"	0.177 gpm @ 40 psi	1.2 scfm @ 40 psi
0.038"	0.202 gpm @ 40 psi	1.2 scfm @ 40 psi
0.04"	0.228 gpm @ 40 psi	1.3 scfm @ 40 psi
0.042"	0.247 gpm @ 40 psi	1.4 scfm @ 40 psi
0.047"	0.304 gpm @ 40 psi	1.5 scfm @ 40 psi
0.052"	0.373 gpm @ 40 psi	1.6 scfm @ 40 psi
0.055"	0.43 gpm @ 40 psi	1.7 scfm @ 40 psi
0.063"	0.557 gpm @ 40 psi	2 scfm @ 40 psi
0.125"	2.34 gpm @ 40 psi	4 scfm @ 40 psi

Barbed × Barbed
For Tube ID	Lg.		Each
1/4"	1 5/16"	0000000	000000

How to Measure Fittings

Push-to-Connect Flow-Control Orifices

Barbed Flow-Control Orifices