Steel Mufflers | McMaster-Carr

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	Body Material Body Material

Bronze

Steel

Aluminum

	Fitting Material Fitting Material

Steel

Aluminum

	Pipe Size Pipe Size

	Thread Type Thread Type

	Gender Gender

Male

Female

	For Reducing For Reducing

Noise

Particles

Oil Mist

	For Use With For Use With

Air

Inert Gas

	Maximum Pressure Maximum Pressure

	Drive Style Drive Style

	External Hex

	Connection Style Connection Style

Threaded

Quick Clamp

	System of Measurement System of Measurement

Inch

	Hex Size Hex Size

	Fitting Finish Fitting Finish

Nickel Plated

Zinc Plated

	Minimum Noise Reduction Rating Minimum Noise Reduction Rating

	Height Height

	Removes Particle Size Down To Removes Particle Size Down To

250 microns or greater

Not Rated

	Maximum Flow Rate Maximum Flow Rate

	Maximum Temperature Maximum Temperature

Less than 150° F

200° to 249° F

250° to 499° F

	Connection Type Connection Type


Pipe	Tube

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

	Filter Material Filter Material

Plastic

Brass

Steel

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

REACH Compliant

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106 Products

About Noise, Filtration, and Flow Ratings

Use these mufflers with air-powered tools, valves, and cylinders to reduce noise and filter exhaust fumes.

Brass, bronze, and copper mufflers offer good corrosion resistance.

Mufflers with Pipe Connection

NPT Male Steel Fitting—Bronze Body
Style	Pipe Size	Thread Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dB		Each
A	1/16	__	26 scfm @ 100 psi	125	300°	15/16"	Air, Inert Gas	40	15-20	0000000	00000
A	1/8	__	11 scfm @ 100 psi	300	300°	1 1/8"	Air, Inert Gas	40	15-20	000000	0000
A	1/4	__	21 scfm @ 100 psi	300	300°	1 3/8"	Air, Inert Gas	40	15-20	000000	0000
A	3/8	__	23 scfm @ 100 psi	300	300°	1 1/2"	Air, Inert Gas	40	15-20	000000	0000
A	1/2	__	57 scfm @ 100 psi	300	300°	1 7/8"	Air, Inert Gas	40	15-20	000000	0000
A	3/4	__	112 scfm @ 100 psi	300	300°	2 1/4"	Air, Inert Gas	40	15-20	000000	0000
A	1	__	154 scfm @ 100 psi	300	300°	2 7/8"	Air, Inert Gas	40	15-20	000000	00000
A	1 1/4	__	154 scfm @ 100 psi	300	300°	3 1/4"	Air, Inert Gas	90	15-20	000000	00000
A	1 1/2	__	162 scfm @ 100 psi	300	300°	3 11/16"	Air, Inert Gas	90	15-20	000000	00000
A	2	__	2,190 scfm @ 100 psi	125	300°	4 3/4"	Air, Inert Gas	90	15-20	0000000	00000
UNF Male Steel Fitting—Bronze Body
A	__	10-32	6 scfm @ 100 psi	300	300°	11/16"	Air, Inert Gas	40	15-20	0000000	0000
BSPT Male Steel Fitting—Bronze Body
A	1/8	__	53 scfm @ 100 psi	125	300°	15/16"	Air, Inert Gas	40	15-20	0000000	0000
A	1/4	__	70 scfm @ 100 psi	125	300°	1 5/16"	Air, Inert Gas	40	15-20	0000000	0000
A	3/8	__	175 scfm @ 100 psi	125	300°	1 1/2"	Air, Inert Gas	40	15-20	0000000	0000
A	1/2	__	263 scfm @ 100 psi	125	300°	2"	Air, Inert Gas	40	15-20	0000000	0000
A	3/4	__	438 scfm @ 100 psi	125	300°	2 5/16"	Air, Inert Gas	40	15-20	0000000	00000
A	1	__	613 scfm @ 100 psi	125	300°	2 15/16"	Air, Inert Gas	40	15-20	0000000	00000
A	1 1/4	__	700 scfm @ 100 psi	125	300°	3 1/2"	Air, Inert Gas	90	15-20	0000000	00000
A	1 1/2	__	1,314 scfm @ 100 psi	125	300°	4"	Air, Inert Gas	90	15-20	0000000	00000
A	2	__	2,190 scfm @ 100 psi	125	300°	4 13/16"	Air, Inert Gas	90	15-20	0000000	00000
NPSM Female Steel Fitting—Bronze Body
N	1/8	__	53 scfm @ 100 psi	125	300°	1 5/16"	Air, Inert Gas	40	15-20	0000000	0000
N	1/4	__	70 scfm @ 100 psi	125	300°	1 1/2"	Air, Inert Gas	40	15-20	0000000	0000
N	3/8	__	175 scfm @ 100 psi	125	300°	2"	Air, Inert Gas	40	15-20	0000000	0000
N	1/2	__	263 scfm @ 100 psi	125	300°	2 1/4"	Air, Inert Gas	40	15-20	0000000	00000

Compact High-Flow Mufflers

With Male Fitting

With Female Fitting

A small hex size makes these high-flow mufflers a good fit for cramped spaces. Commonly used with high-flow, air-powered equipment, such as diaphragm pumps and valves, they reduce noise and filter exhaust fumes without restricting flow.

NPT Male Zinc-Plated Steel Fitting
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dB		Each
1/8	48 scfm @ 100 psi	150	400°	1 3/8"	Air, Inert Gas	100	15-22	0000000	00000
1/4	105 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	15-22	0000000	0000
3/8	219 scfm @ 100 psi	150	400°	2 3/16"	Air, Inert Gas	100	15-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	15-22	0000000	00000
3/4	613 scfm @ 100 psi	150	400°	3 3/16"	Air, Inert Gas	100	15-22	0000000	00000
1	876 scfm @ 100 psi	150	400°	3 7/8"	Air, Inert Gas	100	15-22	0000000	00000
1 1/4	1,226 scfm @ 100 psi	150	400°	4 1/2"	Air, Inert Gas	100	15-22	0000000	00000
1 1/2	1,576 scfm @ 100 psi	150	400°	5"	Air, Inert Gas	100	15-22	0000000	00000
2	2,452 scfm @ 100 psi	150	400°	5 1/2"	Air, Inert Gas	100	15-22	0000000	00000
BSPT Male Zinc-Plated Steel Fitting
1/8	48 scfm @ 100 psi	150	400°	1 3/8"	Air, Inert Gas	100	15-22	0000000	0000
1/4	105 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	15-22	0000000	0000
3/8	219 scfm @ 100 psi	150	400°	2 3/16"	Air, Inert Gas	100	15-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	15-22	0000000	00000
3/4	613 scfm @ 100 psi	150	400°	3 3/16"	Air, Inert Gas	100	15-22	0000000	00000
1	876 scfm @ 100 psi	150	400°	3 7/8"	Air, Inert Gas	100	15-22	0000000	00000
1 1/4	1,226 scfm @ 100 psi	150	400°	4 1/2"	Air, Inert Gas	100	15-22	0000000	00000
1 1/2	1,576 scfm @ 100 psi	150	400°	5"	Air, Inert Gas	100	15-22	0000000	00000
2	2,452 scfm @ 100 psi	150	400°	5 1/2"	Air, Inert Gas	100	15-22	0000000	00000
NPSM Female Zinc-Plated Steel Fitting
1/8	48 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	15-22	0000000	0000
1/4	105 scfm @ 100 psi	150	400°	2 1/4"	Air, Inert Gas	100	15-22	0000000	00000
3/8	219 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	15-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	3 1/8"	Air, Inert Gas	100	15-22	0000000	00000

Clog-Resistant Mufflers

Replace your muffler less often—these have a filter design that stays clean longer than porous mufflers. They’re often used in air-powered circuits to reduce noise and filter exhaust fumes.

Style A has a screw on top to adjust air flow.

NPT Male Zinc-Plated Steel Fitting
Style	Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dB		Each
A	1/8	35 scfm @ 100 psi	150	400°	1 1/16"	Air	900	12-15	0000000	00000
A	1/4	52 scfm @ 100 psi	150	400°	1 5/8"	Air	900	12-15	0000000	0000

Inline Mufflers

With Steel Male Fitting

With Steel Female Fitting

With a threaded connection on both ends, these mufflers can be installed anywhere in your line. Use with large blowers, diaphragm pumps, vacuum pumps, and compressors to reduce noise and filter exhaust fumes.

Mufflers with steel body and fittings are heavy duty for durability in rugged environments.

NPT Male Steel Fittings
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Dia.	Lg.	For Use With	Body Material	Insulation Material	Noise Reduction Rating, dB		Each
1/2	25 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	13 7/8"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	0000000
3/4	35 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	14 1/2"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
1	42 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	14 1/2"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
1 1/4	55 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	14 1/2"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
1 1/2	155 scfm @ 14.5 psi	Not Rated	212°	2 5/8"	14 1/2"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
2	270 scfm @ 14.5 psi	Not Rated	212°	3 5/8"	18 1/2"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
2 1/2	385 scfm @ 14.5 psi	Not Rated	212°	4 5/8"	23 11/16"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
3	575 scfm @ 14.5 psi	Not Rated	212°	5 1/8"	28"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
4	575 scfm @ 14.5 psi	Not Rated	212°	10"	29 5/16"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
NPT Female Steel Fittings
1	42 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	12"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
1 1/4	55 scfm @ 14.5 psi	Not Rated	212°	2 1/2"	12"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
1 1/2	155 scfm @ 14.5 psi	Not Rated	212°	2 5/8"	12"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
2	270 scfm @ 14.5 psi	Not Rated	212°	3 5/8"	15 3/4"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
2 1/2	385 scfm @ 14.5 psi	Not Rated	212°	4 5/8"	20 7/8"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
3	575 scfm @ 14.5 psi	Not Rated	212°	5 1/8"	25 7/8"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000
4	575 scfm @ 14.5 psi	Not Rated	212°	10"	24 11/16"	Air, Inert Gas	Steel	Polyester Plastic	30	0000000	000000

End-Exhaust Mufflers

These mufflers exhaust through narrow holes on one end to provide a concentrated blast of air. Use them to eject items from your conveyor and direct exhaust away from delicate applications. They have an external hex drive so they can be tightened with a wrench.

NPT Male Steel Fitting
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Noise Reduction Rating, dB		Each
1/8	24 scfm @ 100 psi	175	300°	1 3/8"	Air, Inert Gas	21	0000000	00000
1/4	37 scfm @ 100 psi	175	300°	1 3/4"	Air, Inert Gas	21	0000000	0000
3/8	49 scfm @ 100 psi	175	300°	2 3/16"	Air, Inert Gas	21	0000000	00000
1/2	74 scfm @ 100 psi	175	300°	2 3/4"	Air, Inert Gas	21	0000000	00000
3/4	82 scfm @ 100 psi	175	300°	3 3/16"	Air, Inert Gas	21	0000000	00000
1	110 scfm @ 100 psi	175	300°	3 7/8"	Air, Inert Gas	21	0000000	00000

Oil-Mist-Recycling Mufflers

With Female Fitting

With Male Fitting

Replacement Filter

Also known as reclassifiers, these mufflers have a clear reservoir with a drain plug to remove and store oil mist for reuse. Mufflers must be mounted vertically.

Mufflers												Replacement Filters
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Reservoir Material	Removes Particle Size Down To, microns	Noise Reduction Rating, dB		Each		Each
NPT Female Aluminum Fitting
1/4	7 scfm @ 15 psi	15	140°	3 1/2"	2 3/16"	Air	Plastic	0.3	35	0000000	000000	0000000	000000
3/8	11 scfm @ 15 psi	15	140°	4 3/4"	2 15/16"	Air	Plastic	0.3	35	0000000	00000	0000000	00000
1/2	35 scfm @ 15 psi	15	140°	6 13/16"	4 1/16"	Air	Plastic	0.3	35	0000000	00000	0000000	00000
3/4	35 scfm @ 15 psi	15	140°	6 13/16"	4 1/16"	Air	Plastic	0.3	35	0000000	00000	0000000	00000
NPT Male Aluminum Fitting
1	106 scfm @ 15 psi	15	140°	8 7/8"	4 5/8"	Air	Plastic	0.3	35	0000000	00000	0000000	00000
1 1/2	212 scfm @ 15 psi	15	140°	10 5/8"	5 5/16"	Air	Plastic	0.3	35	0000000	000000	0000000	000000
2	353 scfm @ 15 psi	15	140°	12 7/8"	6 1/16"	Air	Plastic	0.3	35	0000000	000000	0000000	000000

High-Noise-Reducing Mufflers

Install these mufflers in air-powered drills and other loud equipment. They filter exhaust fumes and reduce noise by 30-35 dB, a reduction that's equivalent to putting in earplugs.

Mufflers with pipe connections thread into NPT or metric threaded exhaust ports.

Mufflers with Pipe Connection

Steel Body

NPT Male Aluminum Fitting
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Body Material	Noise Reduction Rating, dB		Each
3/4	423 scfm @ 72 psi	145	140°	4 1/4"	1 13/16"	Air	Steel	30-35	0000000	000000
1	706 scfm @ 72 psi	145	140°	5 3/16"	1 15/16"	Air	Steel	30-35	0000000	00000
1 1/4	1,059 scfm @ 72 psi	145	140°	7 7/8"	2 15/16"	Air	Steel	30-35	0000000	00000
1 1/2	1,765 scfm @ 72 psi	145	140°	9 3/16"	2 15/16"	Air	Steel	30-35	0000000	00000
2	2,825 scfm @ 72 psi	145	140°	10 3/8"	3 3/8"	Air	Steel	30-35	0000000	00000

Inline High-Noise-Reducing Mufflers

With a threaded connection on both ends, these mufflers can be installed anywhere in your line. They are designed to minimize noise from rotary and centrifugal blowers, vacuum pumps, low-pressure vents, and other loud equipment with minimal pressure drop.

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

NPT Female Steel Fittings
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Dia.	Lg.	For Use With	Body Material	Insulation Material	Noise Reduction Rating, dB		Each
1/2	12 scfm @ 14.7 psi	15	325°	3 1/4"	8"	Air, Inert Gas	Steel	Polywool	45	0000000	0000000
3/4	25 scfm @ 14.7 psi	15	325°	3 1/4"	11"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
1	45 scfm @ 14.7 psi	15	325°	3 1/4"	14"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
1 1/4	70 scfm @ 14.7 psi	15	325°	3 1/4"	16"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
1 1/2	100 scfm @ 14.7 psi	15	325°	5"	19 3/4"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
2	180 scfm @ 14.7 psi	15	325°	5"	26"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
2 1/2	275 scfm @ 14.7 psi	15	325°	6 1/8"	33 1/2"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
3	400 scfm @ 14.7 psi	15	325°	6 5/8"	36 1/2"	Air, Inert Gas	Steel	Polywool	45	0000000	000000
4	700 scfm @ 14.7 psi	15	325°	8"	48 7/8"	Air, Inert Gas	Steel	Polywool	45	0000000	000000

Exhaust Filters/Mufflers for Dry High-Vacuum Pumps

Purify exhaust fumes while silencing the noise from your oil-free high-vacuum pumps. With quick-clamp (KF) connections, these filters/mufflers connect to exhaust ports with a clamp and ring (sold separately). Mount them vertically or horizontally. All are carbon steel with a powder-coated finish for corrosion resistance.

Exhaust Filters/Mufflers

							O'all					Element
Trade Number	Flange OD	For Tube OD	Max. Flow Rate	High Vacuum Connection Type	Max. Vacuum	Temp. Range, °F	Ht.	Dia.	Removes Particle Size Down To, microns	Noise Reduction Rating, dB	Filter Efficiency	Ht.	OD	Material		Each
Powder-Coated Steel Housing with Zinc-Plated Steel Fittings
16	1.18"	3/4"	9 scfm @ 14.7 psi	ISO-KF	Not Rated	-15° to 220°	3 3/4"	3 1/4"	25	10-15	99%	1 3/8"	3"	Polyester Plastic	0000000	0000000
25	1.57"	1"	11 scfm @ 14.7 psi	ISO-KF	Not Rated	-15° to 220°	3 3/4"	3 1/4"	25	10-15	99%	1 3/8"	3"	Polyester Plastic	0000000	000000
25	1.57"	1"	24 scfm @ 14.7 psi	ISO-KF	Not Rated	-15° to 220°	4 1/2"	4 1/8"	25	10-15	99%	1 3/8"	4"	Polyester Plastic	0000000	000000

Replacement Elements

Polyester Plastic
Ht.	OD	Removes Particle Size Down To, microns	Noise Reduction Rating, dB	Filter Efficiency		Each
1 3/8"	3"	25	10-15	99%	0000000	00000
1 3/8"	4"	25	10-15	99%	0000000	00000

Clamps

Trade Number	For Flange OD	For Tube OD	Material	Max. Vacuum	High Vacuum Connection Type		Each
10	1.18"	1/2"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	00000
10, 16	1.18"	1/2", 3/4"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	0000
16	1.18"	3/4"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	0000
25	1.57"	1"	Aluminum	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	00000

Rings

Trade Number	For Flange OD	For Tube OD	Inner Ring Material	Max. Vacuum	High Vacuum Connection Type		Each
16	1.18"	3/4"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	00000000	00000
25	1.57"	1"	304 Stainless Steel	1 × 10^-7 torr @ 72° F	ISO-KF	0000000	0000