40 PSI Air Compressors | McMaster-Carr

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System of Measurement

Voltage

Tank Capacity

Power Source

Power

Actuation Pressure

Mounting Position

Electrical Phase

Maximum Pressure

1,000 psi to 2,999 psi

3,000 psi to 3,999 psi

4,000 psi or greater

Not Rated

Maximum Flow Rate @ Pressure

7.4 ft³/min @ 40 psi

10.9 ft³/min @ 40 psi

12.4 ft³/min @ 40 psi

Drive Type

Full Load Current

Duty Cycle

Mobility

For Compressed Air Type

Lubricated

Volume (Sound)

77 dB

Piston Style

One-Stage Reciprocating

Overall Height

Crank Case Material

Actuation

Lubricant Required

Overall Width

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Compliant with Exemptions

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29 Products

About Pressure-Relief Valves

About Air Preparation

About Air Compressors

Fire Sprinkler Electric Air Compressors

Maintain air pressure in your sprinkler system. These piston air compressors turn on when their tank pressure drops to the actuation point, then turn off when it reaches the maximum. They are UL and C-UL listed, as well as CSA and CSA-US certified, so they meet U.S. and Canadian safety standards.

Air Compressors

Replacement Belts

Air Compressors
Pressure, psi						Outlet			Overall					Replacement Drive Belts
Max.	Actuation	Max. Flow Rate @ psi	hp	Full Load Current, A	Vol., dB	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.		Each		Each
Single Phase, 115V AC/230V AC
40	30	12.4 cfm @ 40	2	15.8	77	1/2	NPT	Female	25 3/4"	16 1/4"	18 1/4"	00000000	000000000	00000000	000000

Air Compressors with Tank

Replacement Belts

Air Compressors
Pressure, psi							Outlet			Overall					Replacement Drive Belts
Max.	Actuation	Max. Flow Rate @ psi	hp	Full Load Current, A	Tank Cap., gal.	Vol., dB	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.		Each		Each
Single Phase, 115V AC/230V AC
40	30	7.4 cfm @ 40	1	12.5	30	77	1/2	NPT	Female	39"	16 1/2"	34 1/4"	00000000	000000000	00000000	000000
40	30	10.9 cfm @ 40	1 1/2	15.8	30	77	1/2	NPT	Female	39"	16 1/2"	34 1/4"	00000000	00000000	00000000	00000
40	30	12.4 cfm @ 40	2	21.6	30	77	1/2	NPT	Female	39"	16 1/2"	34 1/4"	00000000	00000000	00000000	00000

Replacement Parts

Oil

Filter Element

		Compressor Oil
Component	Container Size, qt.	Type	Base		Each
Oil	1	20W-30	Synthetic	00000000	000000
Filter Element	__	__	__	00000000	00000

Easy-Set Compressed Air Regulators

A pressure-calibrated dial on these regulators allows for easy adjustments to outlet pressure in high-flow applications. They are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after filters.

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

Regulators
Pipe Size					Overall								Mounting Brackets
Inlet	Outlet	Max. Flow Rate	Max. Pressure, psi	Gauge Included	Wd.	Ht.	Housing Material	Max. Temp., °F	Regulating Accuracy	Pressure Regulating Range, psi		Each		Each
Zinc Housing
NPT Female Inlet and Outlet
1/4	1/4	117 scfm @ 100 psi	300	No	3 1/4"	4 1/8"	Zinc	150°	±3 psi	0-40	0000000	0000000	0000000	000000
3/8	3/8	180 scfm @ 100 psi	300	No	3 1/4"	4 1/8"	Zinc	150°	±3 psi	0-40	0000000	000000	0000000	00000
1/2	1/2	195 scfm @ 100 psi	300	No	3 1/4"	4 1/8"	Zinc	150°	±3 psi	0-40	0000000	000000	0000000	00000
3/4	3/4	220 scfm @ 100 psi	300	No	3 1/4"	4 1/8"	Zinc	150°	±3 psi	0-40	0000000	000000	0000000	00000
1	1	650 scfm @ 100 psi	300	No	4 1/4"	5 1/4"	Zinc	150°	±3 psi	2-40	000000	000000	0000000	00000

Manifold-Mount Compressed Air Regulators

Multiple Regulators Shown Installed (Manifold Sold Separately)

Mount these miniature regulators on a manifold (sold separately) to create a regulating manifold. Each regulator can be set to a different output pressure, so you can power multiple tools or machines with a single air supply. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after filters.

Regulators with a panel-mount nut can be installed through a hole in a panel or enclosure. They let you hide your air lines without losing access to the control knob.

NPT Male Inlet × UNF Female Outlet

Regulators
						Overall								4-Outlet Manifolds		6-Outlet Manifolds		10-Outlet Manifolds
Inlet Pipe Size	Outlet Thread Size	Max. Flow Rate	Max. Pressure, psi	Housing Material	Gauge Included	Wd.	Ht.	Max. Temp., °F	Includes	Regulating Accuracy	Pressure Regulating Range, psi		Each		Each		Each		Each
1/8	10-32	5 scfm @ 100 psi	250	Brass	No	3/4"	2 3/4"	150°	Panel-Mount Nut	±10%	0-40	0000000	000000	00000000	000000	00000000	000000	00000000	000000

Precision Compressed Air Regulators

±0.1% Regulating Accuracy

Use these regulators in sensitive applications that require constant, consistent pressure for precise force and movement. They’re often used on calibration stands in laboratories or with air-powered clamps that hold delicate items. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after filters.

BSPP threads are also known as G threads.

Regulators with a ±0.1% accuracy have a sensor and a servo-adjustment mechanism that work together to monitor pressure and instantly adapt to input pressure changes—even when conditions change. They have a locking nut to prevent accidental pressure changes.

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

Regulators
Pipe Size						Overall								Mounting Brackets
Inlet	Outlet	Max. Flow Rate	Max. Pressure, psi	Gauge Included	No. of Gauge Ports	Wd.	Ht.	Housing Material	Max. Temp., °F	Features	Pressure Regulating Range, psi		Each		Each
NPT Female Inlet and Outlet
±0.1% Regulating Accuracy
1/4	1/4	14 scfm @ 100 psi	150	No	2	2 1/8"	4 1/4"	Zinc	160°	Servo-Adjustment Mechanism, Locking Nut	2-40	0000000	0000000	0000000	000000
3/8	3/8	14 scfm @ 100 psi	150	No	2	2 1/8"	4 1/4"	Zinc	160°	Servo-Adjustment Mechanism, Locking Nut	2-40	0000000	000000	0000000	00000
BSPP Female Inlet and Outlet
±0.1% Regulating Accuracy
1/4	1/4	14 scfm @ 100 psi	150	No	2	2 1/8"	4 1/4"	Zinc	160°	Servo-Adjustment Mechanism, Locking Nut	2-40	0000000	000000	0000000	00000

ASME-Code Fast-Acting Pressure-Relief Valves for Air and Inert Gas

Valve
With
Test Ring

For Use With: Air, Inert Gas
Temperature Range: See table

To protect against damage in air lines, air receivers, compressor tanks, and other air-powered equipment, these valves spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. All meet ASME Code Section VIII for use with air and inert gas pressure vessels. They have a vented relief port to exhaust discharge directly.

Silicone seals provide better leak protection than brass seals.

Inlet
Pipe Size	Location	Relief Port Location	Temperature Range, ° F	Overall Ht.	Test Mechanism	Valve Type	Specifications Met	Set Pressure, psi		Each
NPT Male Inlet and Relief Vent
Brass Body—Silicone Seal
1/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	00000
1/4	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	0000
3/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	0000
1/2	Bottom	Side	-15° to 250°	3 13/16"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	00000
3/4	Bottom	Side	-15° to 250°	3 13/16"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	00000
1	Bottom	Side	-15° to 250°	4 7/8"	Ring	Pop Safety	ASME BPVC.VIII	40	00000000	00000