McMaster-Carr

Ensure sufficient pressure to operate air-powered tools and machines. Pressure boosters compress the air supply, which increases air pressure. To maximize performance and service life, install a filter inline before the booster to remove particles down to the maximum particle size. Do not use boosters for tank capacities larger than specified.

Adjustable boosters have an integral regulator so you can fine-tune the output pressure. They come with pressure gauges on the inlet and outlet.

Boosters with 3/8 NPT female inlet and outlet require compressed air to operate—they have a drive inlet and a pilot inlet that control the booster.

Compressed Air Pressure Boosters

Adjustable Booster with
1/4 NPTF Female
Supply Inlet

Fixed Booster with
1/4 NPT Female
Supply Inlet

Fixed Booster with 3/8 NPT Female Supply Inlet

Input to Output Ratio		Pressure, psi							Overall			Mounting Holes
Pressure	Flow	Input	Output	For Tank Cap., gal.	Max. Particle Size, µm	No. of Inlets	Duty Cycle	Max. Temp., °F	Lg.	Wd.	Ht.	No. of	Dia.	Mounting Fasteners Included		Each
Adjustable
1/4 NPTF Female Supply Inlet and Outlet
1:2	2:1	14.5-145	29-290	5-10	5	1	__	122°	6"	5"	4 1/2"	4	0.22"	No	0000000	0000000
1:4	4:1	14.5-145	29-290	5-10	5	1	__	122°	6"	5"	4 1/2"	4	0.22"	Yes	0000000	000000
Fixed
1/4 NPT Female Supply Inlet and Outlet
1:2	2:1	10-100	20-200	0-5	40	1	4 Minutes On, 4 Minutes Off	Not Rated	7 1/2"	5 1/4"	4 1/2"	4	0.28"	No	0000000	000000
1:4	4:1	10-100	40-400	0-5	40	1	4 Minutes On, 4 Minutes Off	Not Rated	7 1/2"	5 1/4"	4 1/2"	4	0.28"	No	0000000	000000
3/8 NPT Female Supply Inlet and Outlet
2:1	2:1	25-150	30-300	4-60	40	1	30 Minutes On, 30 Minutes Off	180°	17"	8"	11"	4	0.38"	No	0000000	00000000
5:1	7:1	30-870	90-870	1-15	40	2	30 Minutes On, 30 Minutes Off	140°	24"	9"	9"	4	0.44"	No	0000000	00000000

Repair Kits

Repair Kit

Air Drive Repair Kit
For Pressure Input to Output Ratio	For Inlet Pipe Size	For Inlet Thread Type	Includes		Each
1:2, 1:4	1/4	NPT	Bearing, Nine O-Rings, Spring, Star Washer	00000000	000000
Check Valve Repair Kit
1:2, 1:4	1/4	NPT	Three O-Rings, Two Balls, Two Seat Balls, Two Springs	00000000	00000
Complete Repair Kit
1:2	1/4	NPT	Bearing, Cotter Pin, High-Pressure Seal, Star Washer, Thirteen O-Rings, Three Springs, Two Balls, Two Seat Balls	00000000	000000
1:4	1/4	NPT	Bearing, Cotter Pin, High-Pressure Seal, Star Washer, Thirteen O-Rings, Three Springs, Two Balls, Two Seat Balls	00000000	000000
High-Pressure Section Repair Kit
1:2	1/4	NPT	Cotter Pin, High-Pressure Seal, O-Ring	00000000	00000
1:4	1/4	NPT	Cotter Pin, High-Pressure Seal, O-Ring	00000000	00000

Compressed Air Flow Boosters

Adjustable

Fixed

Fixed with Flange

Create a high-flow air stream from your compressed air supply. Flow boosters draw in ambient air, which amplifies compressed air flow. To maximize performance and service life, install a filter inline before the booster to remove particles down to the maximum particle size. Use hose clamps (not included) to connect hose or duct to the inlet or outlet.

Adjustable boosters allow you to fine-tune the flow—rotate the knurled ring to change the amount of ambient air drawn into the booster.

Boosters with flange mount easily near your equipment.

	Input				Ambient Air Inlet		Outlet		Overall		Flange		Mounting Holes
Flow Input to Output Ratio	Flow Rate @ 90 psi	Pressure, psi	Output Flow Rate @ 90 psi	Max. Particle Size, µm	Connection Type	For Tube ID	Connection Type	For Tube OD	Lg.	Wd.	Ht.	Lg.	No. of	Dia.	Mounting Fasteners Included		Each
Adjustable
1/8 NPT Male Supply Inlet
1:6	13 cfm	5-150	35-65 cfm	20	Clamp On	0.75"	Clamp On	0.75"	2 9/16"	1"	__	__	__	__	__	00000000	000000
1:8	13 cfm	5-150	37-79 cfm	20	Clamp On	0.75"	Clamp On	0.75"	2 9/16"	1 1/8"	__	__	__	__	__	00000000	00000
1:12	25 cfm	5-150	155-250 cfm	20	Clamp On	1.125"	Clamp On	1.125"	2 5/8"	1 1/2"	__	__	__	__	__	00000000	00000
1/4 NPT Male Supply Inlet
1:15	28 cfm	5-150	200-400 cfm	20	Clamp On	1.5"	Clamp On	1.5"	3 1/4"	2"	__	__	__	__	__	00000000	000000
1:20	29 cfm	5-150	330-520 cfm	20	Clamp On	2"	Clamp On	2"	3 1/4"	2 1/2"	__	__	__	__	__	00000000	000000
1:22	40 cfm	5-150	380-840 cfm	20	Clamp On	2.5"	Clamp On	2.5"	4 5/8"	3"	__	__	__	__	__	00000000	000000
3/8 NPT Male Supply Inlet
1:25	51 cfm	5-150	700-1,200 cfm	20	Clamp On	3.5"	Clamp On	3.5"	5 1/4"	4"	__	__	__	__	__	00000000	000000
Fixed
1/8 NPT Female Supply Inlet
1:4	8 cfm	10-200	29.2 cfm	5	Clamp On	0.75"	Clamp On	0.75"	2 1/2"	1 3/8"	__	__	__	__	__	0000000	00000
1:4	8 cfm	10-200	29.2 cfm	5	Clamp On	1.33"	Clamp On	0.75"	2 1/8"	1 3/8"	__	__	__	__	__	0000000	00000
1:4	17 cfm	10-200	62 cfm	5	Clamp On	1.33"	Clamp On	0.5"	2 5/8"	1 3/8"	__	__	__	__	__	0000000	00000
Fixed with Flange
1/8 NPT Female Supply Inlet
1:10	6.5 cfm	5-150	42 cfm	20	Clamp On	0.98"	Clamp On	0.73"	2 3/16"	2 5/16"	1.3"	2.3"	2	0.2"	No	000000	00000
1/4 NPT Female Supply Inlet
1:15	11 cfm	5-150	155 cfm	20	Clamp On	1.5"	Clamp On	1.22"	2 3/4"	3"	1.9"	3"	2	0.27"	No	0000000	000000
3/8 NPT Female Supply Inlet
1:16	21 cfm	5-150	325 cfm	20	Clamp On	2.95"	Clamp On	2"	3 3/4"	4 1/8"	3.2"	4.1"	2	0.27"	No	0000000	000000
1/2 NPT Female Supply Inlet
1:17	42 cfm	5-150	615 cfm	20	Clamp On	4.92"	Clamp On	4"	7"	8 1/2"	5.9"	8.5"	2	0.53"	No	0000000	000000

Compressed Air Pilot Signal Flow Boosters

Use a low-flow air pilot signal with an air supply to produce flow up to 50 cfm to actuate valves and other air-powered system components. To maximize performance and service life, install a filter inline before the booster to remove particles down to the maximum particle size.

Boosters with a 1:1 pressure input to output ratio maintain pressure between the air supply inlet and the boosted output.

Boosters with 1:3 and 1:6 pressure input to output ratios increase pressure between the air supply inlet and the boosted output.

	Pressure, psi				Air Pilot			Gauge Port					Overall			Mounting Holes
Pressure Input to Output Ratio	Input	Output	Max. Air Pilot Signal	Max. Particle Size, µm	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Exhaust Air Flow, scfm	Max. Temp., °F	Lg.	Wd.	Ht.	No. of	Dia.	Mounting Fasteners Included		Each
Fixed
1/4 NPT Female Supply Inlet and Outlet
1:1	0-250	0-150	150	40	1/4	NPT	Female	1/4	NPT	Female	15	160°	3"	3"	4"	6	0.33"	No	0000000	0000000
1:3	0-250	0-150	50	40	1/4	NPT	Female	1/4	NPT	Female	15	160°	3"	3"	4"	6	0.33"	No	0000000	000000
1:6	0-250	0-150	25	40	1/4	NPT	Female	1/4	NPT	Female	10	160°	3"	3"	4"	6	0.33"	No	0000000	000000
3/8 NPT Female Supply Inlet and Outlet
1:1	0-250	0-150	150	40	1/4	NPT	Female	1/4	NPT	Female	15	160°	3"	3"	4"	6	0.33"	No	0000000	000000

Optional Mounting Bracket

000000

Each

000000

Tamper-Resistant Compressed Air Regulators

With Knob-Locking Clip

Prevent unauthorized adjustment and unintentional pressure changes with these regulators. Use them in your air line to adjust and maintain the pressure of your compressed air. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install in your air line after filters.

Mounting brackets 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	Wd.	Ht.	Max. Temp., °F	Regulating Accuracy	Pressure Regulating Range, psi		Each		Each
With Knob-Locking Clip
Aluminum Housing—NPT Female Inlet and Outlet
1/4	1/4	86 scfm @ 100 psi	250	Yes	2 1/4"	4 7/8"	140°	±2%	0-140	0000000	000000	0000000	000000
3/8	3/8	179 scfm @ 100 psi	250	Yes	2 7/8"	5 1/2"	140°	±2%	0-140	0000000	00000	0000000	00000
1/2	1/2	210 scfm @ 100 psi	250	Yes	2 7/8"	5 1/2"	140°	±2%	0-140	0000000	00000	0000000	00000
3/4	3/4	290 scfm @ 100 psi	250	Yes	3 5/8"	7 1/4"	140°	±2%	0-140	0000000	000000	0000000	00000
1	1	290 scfm @ 100 psi	250	Yes	3 5/8"	7 1/4"	140°	±2%	0-140	0000000	000000	0000000	00000

High-Flow Precision Compressed Air Regulators

With a greater flow capacity than our standard precision compressed air regulators, use these regulators to adjust and maintain air pressure in sensitive high-flow applications where constant, consistent pressure is important. Install in your air line after filters.

Relieving regulators exhaust when the downstream pressure exceeds the set pressure.

Nonrelieving regulators do not exhaust excess downstream pressure.

BSPP threads are also known as G threads.

Pressure gauges are for use with regulators with NPT threading.

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

Regulators

Regulator

Mounting Bracket

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 Pressure Regulating Range, psi		Each		Each
Aluminum Housing—BSPP Female Inlet and Outlet
Relieving
1/4	1/4	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	000000
3/8	3/8	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	00000	000000	00000
1/2	1/2	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
Nonrelieving
1/4	1/4	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
3/8	3/8	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
1/2	1/2	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
Aluminum Housing—NPT Female Inlet and Outlet
Relieving
1/4	1/4	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	000000	00000	000000	00000
1/4	1/4	100 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000
3/8	3/8	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	000000	00000	000000	00000
1/2	1/2	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-15, 0-30, 0-60, 0-150	000000	000000	000000	00000
1/2	1/2	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2	0000000	000000	000000	00000
1/2	1/2	225 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000
3/4	3/4	250 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000
Nonrelieving
1/4	1/4	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
1/4	1/4	100 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000
3/8	3/8	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
1/2	1/2	80 scfm @ 100 psi	250	No	2	3"	6 1/8"	160°	±0.05%	0-2, 0-15, 0-30, 0-60, 0-150	00000000	000000	000000	00000
1/2	1/2	225 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000
3/4	3/4	250 scfm @ 100 psi	250	No	2	4"	7 5/8"	200°	±0.1%	0-2, 0-10, 0-30, 0-60, 0-100, 0-150, 0-200	00000000	000000	00000000	00000

Pressure Gauges

Pressure Gauge

Pressure Range, psi	Pipe Size	Connection Type	Thread Type	Gender	Connection Location		Each
0-15	1/4	Threaded	NPT	Male	Back	00000000	000000
0-30	1/4	Threaded	NPT	Male	Back	00000000	00000
0-60	1/4	Threaded	NPT	Male	Back	00000000	00000
0-100, 0-150	1/4	Threaded	NPT	Male	Back	00000000	00000

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