Fixed Air Regulators | McMaster-Carr

	Set Pressure Set Pressure

	Inlet Pipe Size Inlet Pipe Size

1/8

1/4

3/8

	Outlet Pipe Size Outlet Pipe Size

1/8

1/4

3/8

	Gauge Port Pipe Size Gauge Port Pipe Size

1/8

1/4

	For Use With For Use With

Air

Inert Gas

	Maximum Pressure Maximum Pressure

250 psi

300 psi

400 psi

	Maximum Flow Rate Maximum Flow Rate

	Maximum Temperature Maximum Temperature

125° F

160° F

175° F

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

RoHS Compliant with
Exemptions

RoHS Compliant

	Overall Width Overall Width

	Overall Height Overall Height

2 5/8"

2 7/8"

3 1/8"

	Number of Gauge Ports Number of Gauge Ports

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

DFARS Specialty Metals
COTS-Exempt

	Housing Material Housing Material

Aluminum

Zinc

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

REACH Compliant

	Outlet Pressure Outlet Pressure

9 Products

About Air Preparation

Zinc Housing

Aluminum
Housing with 400
psi Maximum Pressure

Aluminum
Housing with 250
psi Maximum Pressure

No need to worry about unintentional changes to your pressure setting—these regulators maintain a fixed outlet pressure. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install in your air line after filters.

Mounting brackets (sold separately) allow you to attach the regulator to a wall or equipment.

For technical drawings and 3-D models, click on a part number.

Regulators
Pipe Size						Overall							Mounting Brackets
Inlet	Outlet	Max. Flow Rate	Max. Pressure, psi	Gauge Included	No. of Gauge Ports	Wd.	Ht.	Max. Temp., °F	Regulating Accuracy	Choose a Set Pressure, psi		Each		Each
NPT Female Inlet and Outlet
Zinc Housing
1/8	1/8	13 scfm @ 100 psi	300	No	1	1 3/4"	2 7/8"	125°	±3 psi	30	000000	000000	00000000	000000
1/4	1/4	15 scfm @ 100 psi	300	No	1	1 3/4"	2 7/8"	125°	±3 psi	30	000000	00000	00000000	00000
3/8	3/8	28 scfm @ 100 psi	250	No	1	2 1/8"	3 1/8"	125°	±3 psi	30	000000	00000	00000000	00000
Aluminum Housing
1/8	1/8	12 scfm @ 100 psi	400	No	1	1 1/2"	2 5/8"	175°	±3 psi	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 80, 90, 100	000000	00000	000000	00
1/4	1/4	0.3 scfm @ 100 psi	250	No	1	2 1/2"	3"	160°	Not Rated	1, 2, 3, 4, 5	000000	000000	000000	00
1/4	1/4	12 scfm @ 100 psi	400	No	1	1 1/2"	2 5/8"	175°	±3 psi	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	000000	00000	000000	00

Tamper-Resistant Compact Pressure-Regulating Valves for Air and Inert Gas

For Use With: Air, Inert Gas
Max. Temperature: 175° F

Prevent changes to your pressure setting—these valves come set at a nonadjustable outlet pressure. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. All have two gauge ports.

For technical drawings and 3-D models, click on a part number.

Inlet			Outlet		Gauge Port
Pipe Size	Location	Max. Pressure, psi	Pipe Size	Location	Pipe Size	Location	End-to-End Lg.	Choose an Outlet Pressure, psi		Each
NPT Female
Brass Body—Buna-N Diaphragm and Acetal Seal
1/8	Side	400	1/8	Side	1/8	Side	1.480"	5, 10, 15, 20, 70, 80, 95, 100	000000	000000
1/4	Side	400	1/4	Side	1/8	Side	1.480"	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 100	000000	00000

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About Air Preparation

Fixed-Pressure Compressed Air Regulators

Tamper-Resistant Compact Pressure-Regulating Valves for Air and Inert Gas