High-Flow Mufflers | McMaster-Carr

	Pipe Size Pipe Size

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
3
4
6

	Thread Type Thread Type

NPT

NPSM

BSPT

	Gender Gender

Male

Female

	For Reducing For Reducing

Noise

Particles

	Body Material Body Material

	For Use With For Use With

Air

Inert Gas

Compressed Air

	Maximum Pressure Maximum Pressure

	Maximum Flow Rate Maximum Flow Rate

	Removes Particle Size Down To Removes Particle Size Down To

5 microns

25 microns

100 microns

	Fitting Material Fitting Material

Aluminum

Steel

Stainless Steel

	Filter Material Filter Material

Plastic

Brass

Stainless Steel

	Height Height

	Maximum Temperature Maximum Temperature

	Connection Style Connection Style

Threaded

Quick Clamp

	Connection Type Connection Type


Pipe	Tube

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

	Minimum Noise Reduction Rating Minimum Noise Reduction Rating

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Noise Reduction Rating Maximum Noise Reduction Rating

15 dBA

22 dBA

22 dB

	Diameter Diameter

	Hex Size Hex Size

	Inlet Pipe Size Inlet Pipe Size

112 Products

Matching Flow Diagrams to Replace an Air Directional Control Valve

Choosing an Air Directional Control Valve

About Noise, Filtration, and Flow Ratings

About Flow Control Valves

Also known as cylinder speed controls, flow control valves let you control the extension or retraction speed of your air cylinder. They regulate airflow as it passes from the valve's inlet to its outlet. Air flows freely in the opposite direction.

With Male Fitting

With Female Fitting

Replacement Filter

Commonly used with high-flow, air-powered equipment, such as diaphragm pumps and valves, these mufflers reduce noise and filter exhaust fumes without restricting flow.

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

Mufflers											Replacement Filters
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dBA		Each		Each
NPT Male Aluminum Fitting
1/8	48 scfm @ 100 psi	125	290°	3 1/8"	1 7/8"	Air, Inert Gas	5	17-25	00000000	000000	0000000	000000
1/4	92 scfm @ 100 psi	125	290°	4 3/8"	1 7/8"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
3/8	210 scfm @ 100 psi	125	290°	5 1/8"	2 5/8"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1/2	280 scfm @ 100 psi	125	290°	6"	3 3/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
3/4	595 scfm @ 100 psi	125	290°	7 3/16"	3 7/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1	876 scfm @ 100 psi	125	290°	8 3/4"	3 15/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1 1/4	1,489 scfm @ 100 psi	125	290°	8 3/4"	3 15/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1 1/2	2,277 scfm @ 100 psi	125	290°	13 9/16"	5 1/4"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
2	3,504 scfm @ 100 psi	125	290°	18 7/8"	5 1/4"	Air, Inert Gas	5	17-25	00000000	000000	0000000	00000
3	7,884 scfm @ 100 psi	125	290°	22 7/8"	6 7/8"	Air, Inert Gas	5	17-25	00000000	000000	0000000	00000
4	15,330 scfm @ 100 psi	125	290°	23 1/2"	7 13/16"	Air, Inert Gas	5	17-25	00000000	000000	0000000	00000
6	39,420 scfm @ 100 psi	125	290°	30 7/8"	10 15/16"	Air, Inert Gas	5	17-25	00000000	000000	0000000	000000
NPSM Female Aluminum Fitting
1/4	92 scfm @ 100 psi	125	290°	4"	1 7/8"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
3/8	210 scfm @ 100 psi	125	290°	4 9/16"	2 5/8"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1/2	280 scfm @ 100 psi	125	290°	5 1/2"	3 3/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
3/4	595 scfm @ 100 psi	125	290°	6 11/16"	3 7/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1	876 scfm @ 100 psi	125	290°	7 15/16"	3 15/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1 1/4	1,489 scfm @ 100 psi	125	290°	8"	3 15/16"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
1 1/2	2,277 scfm @ 100 psi	125	290°	12 1/2"	5 1/4"	Air, Inert Gas	5	17-25	00000000	00000	0000000	00000
2	3,504 scfm @ 100 psi	125	290°	17 3/4"	5 1/4"	Air, Inert Gas	5	17-25	00000000	000000	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.

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

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, dBA		Each
1/8	48 scfm @ 100 psi	150	400°	1 3/8"	Air, Inert Gas	100	17-22	0000000	00000
1/4	105 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	17-22	0000000	00000
3/8	219 scfm @ 100 psi	150	400°	2 3/16"	Air, Inert Gas	100	17-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	17-22	0000000	00000
3/4	613 scfm @ 100 psi	150	400°	3 3/16"	Air, Inert Gas	100	17-22	0000000	00000
1	876 scfm @ 100 psi	150	400°	3 7/8"	Air, Inert Gas	100	17-22	0000000	00000
1 1/4	1,226 scfm @ 100 psi	150	400°	4 1/2"	Air, Inert Gas	100	17-22	0000000	00000
1 1/2	1,576 scfm @ 100 psi	150	400°	5"	Air, Inert Gas	100	17-22	0000000	00000
2	2,452 scfm @ 100 psi	150	400°	5 1/2"	Air, Inert Gas	100	17-22	0000000	00000
NPT Male 304 Stainless Steel Fitting
1/8	48 scfm @ 100 psi	150	400°	1 3/8"	Air, Inert Gas	100	17-22	0000000	00000
1/4	105 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	17-22	0000000	00000
3/8	219 scfm @ 100 psi	150	400°	2 3/16"	Air, Inert Gas	100	17-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	17-22	0000000	00000
3/4	613 scfm @ 100 psi	150	400°	3 3/16"	Air, Inert Gas	100	17-22	0000000	00000
1	876 scfm @ 100 psi	150	400°	3 7/8"	Air, Inert Gas	100	17-22	0000000	000000
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	00000
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	17-22	0000000	00000
NPSM Female Zinc-Plated Steel Fitting
1/8	48 scfm @ 100 psi	150	400°	1 3/4"	Air, Inert Gas	100	17-22	0000000	00000
1/4	105 scfm @ 100 psi	150	400°	2 1/4"	Air, Inert Gas	100	17-22	0000000	00000
3/8	219 scfm @ 100 psi	150	400°	2 3/4"	Air, Inert Gas	100	17-22	0000000	00000
1/2	332 scfm @ 100 psi	150	400°	3 1/8"	Air, Inert Gas	100	17-22	0000000	00000

Inline Mufflers

With Aluminum Male 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.

NPT Male Aluminum Fittings
Pipe Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Dia.	Lg.	For Use With	Body Material	Removes Particle Size Down To, microns	Noise Reduction Rating, dBA		Each
1/8	48 scfm @ 100 psi	125	290°	1 7/8"	3 7/8"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	000000
1/4	92 scfm @ 100 psi	125	290°	1 7/8"	5 5/16"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
3/8	210 scfm @ 100 psi	125	290°	2 5/8"	6"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
1/2	280 scfm @ 100 psi	125	290°	3 3/16"	7"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
3/4	595 scfm @ 100 psi	125	290°	3 7/16"	8 1/4"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
1	876 scfm @ 100 psi	125	290°	3 15/16"	10 5/16"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
1 1/4	1,489 scfm @ 100 psi	125	290°	3 15/16"	10 3/8"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	00000
1 1/2	2,277 scfm @ 100 psi	125	290°	5 1/4"	15 3/8"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	0000000	000000
2	3,504 scfm @ 100 psi	125	290°	5 1/4"	20 3/4"	Air, Inert Gas	409 Stainless Steel and Aluminum	5	17-22	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
High-Vacuum Flange Size	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, dBA	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, dBA	Filter Efficiency		Each
1 3/8"	3"	25	10-15	99%	0000000	00000
1 3/8"	4"	25	10-15	99%	0000000	00000

Clamps

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

Rings

For High-Vacuum Flange Size	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

Air-Exhaust Flow Control Valves

Dial Flow Adjustment

Slotted Screw Flow Adjustment

Thumb Screw Flow Adjustment

Install these valves in the exhaust ports of air directional control valves to control exhaust air speed without needing access to your cylinder. They control flow in one direction as air moves from the inlet to the exhaust port (meter out). Air flows freely in the opposite direction. Valves include a muffler to reduce the exhaust noise.

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve. When selecting between valves with the same port size, choose the valve with the higher flow coefficient to ensure it provides enough airflow to operate your system.

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

								Overall
No. of Flow Ports	Inlet Size	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Max. Pressure, psi	Body Material	Hex Size	Dia.	Lg.		Each
Threaded Male Inlet
Dial Flow Adjustment Mechanism
2	1/8 BSPP	None (To Atmosphere)	35	1.016	145	Aluminum	__	16mm	46mm	0000000	000000
2	1/4 BSPP	None (To Atmosphere)	52.5	1.524	145	Aluminum	__	19.5mm	63.3mm	0000000	00000
2	3/8 BSPP	None (To Atmosphere)	59.5	1.728	145	Aluminum	__	25mm	95.3mm	0000000	00000
2	1/2 BSPP	None (To Atmosphere)	141.26	2.982	145	Aluminum	__	28mm	130mm	00000000	00000
2	3/4 BSPP	None (To Atmosphere)	268.39	5.965	145	Aluminum	__	38mm	157mm	00000000	00000
Slotted Screw Flow Adjustment Mechanism
2	1/8 NPT	None (To Atmosphere)	19.21	0.52	145	Aluminum	9/16"	5/8"	1 1/8"	0000000	00000
2	1/8 BSPP	None (To Atmosphere)	19.21	0.52	145	Aluminum	14mm	15mm	27mm	00000000	00000
2	1/4 NPT	None (To Atmosphere)	37	1	145	Aluminum	11/16"	3/4"	1 5/16"	0000000	00000
2	1/4 BSPP	None (To Atmosphere)	37	1	145	Aluminum	17mm	18.2mm	32.1mm	00000000	00000
2	3/8 NPT	None (To Atmosphere)	74	2	145	Aluminum	7/8"	1"	1 5/8"	0000000	00000
2	3/8 BSPP	None (To Atmosphere)	74	2	145	Aluminum	22mm	25mm	41.1mm	00000000	00000
2	1/2 NPT	None (To Atmosphere)	133.2	3.6	145	Aluminum	15/16"	1 1/16"	1 7/8"	0000000	00000
2	1/2 BSPP	None (To Atmosphere)	133.2	3.6	145	Aluminum	24mm	27mm	44.6mm	00000000	00000
Thumb Screw Flow Adjustment Mechanism
2	1/8 BSPT	None (To Atmosphere)	10.59	0.201	145	Brass	10mm	14mm	35.8mm	00000000	00000
2	1/4 BSPT	None (To Atmosphere)	17.66	0.313	145	Brass	14mm	18mm	37mm	00000000	00000
2	M5 Metric	None (To Atmosphere)	3.35	0.06	145	Brass	8mm	10mm	23.4mm	00000000	00000
2	M7 Metric	None (To Atmosphere)	4.24	0.075	145	Brass	8mm	10mm	26.9mm	00000000	00000

Made-to-Order Air-Operated Air-Exhaust Control Valves

When these valves receive an air signal, they quickly dump exhaust air to the atmosphere without routing it back through a directional control valve to speed up the movement of equipment. They're often used with air compressors that require continuous operation. A muffler reduces exhaust noise. Also known as quick exhaust valves.

To Order: Specify minimum pressure and maximum pressure from the ranges listed. The difference between the minimum pressure and maximum pressure must be at least 10 psi, but no more than 30 psi.

								Overall
No. of Flow Ports	Inlet Size	For Outlet Tube ID	Exhaust Connection Type	Air Pilot Size	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Body Material	Lg.	Wd.	Ht.	Choose a Pressure Range Min.	Choose a Pressure Range Max.		Each
Threaded Female Inlet × Barbed Male Outlet × Threaded Male Air Pilot
4	1/8 NPT	1/4"	None (To Atmosphere)	1/4 NPT	20	Not Rated	Brass	2 7/8"	2 1/16"	3 3/8"	40 to 240 psi in 1 psi increments	50 to 250 psi in 1 psi increments	0000000	000000

Quiet Air-Exhaust Control Valves

A muffler on these valves reduces exhaust noise. They allow airflow into your equipment and then quickly vent exhaust air to the atmosphere without routing it back through a directional control valve to speed up the movement of equipment. Also known as quick exhaust valves.

								Overall
No. of Flow Ports	For Inlet Tube OD	For Outlet Tube OD	Exhaust Connection Type	Maximum Flow Rate	Flow Coefficient (Cv)	Pressure Range, psi	Body Material	Lg.	Wd.	Ht.		Each
Push-to-Connect Female Inlet × Push-to-Connect Female Outlet
3	1/4"	1/4"	None (To Atmosphere)	11.36 scfm @ 100 psi	0.8	14-145	PBT Plastic	2"	1/2"	3/4"	0000000	000000
3	1/4"	1/4"	None (To Atmosphere)	6.82 scfm @ 100 psi	0.54	14-145	PBT Plastic	1 5/8"	1/2"	5/8"	0000000	00000
3	4mm	4mm	None (To Atmosphere)	4.47 scfm @ 100 psi	0.14	14-145	PBT Plastic	39.7mm	10mm	14.3mm	0000000	00000
3	6mm	6mm	None (To Atmosphere)	11.36 scfm @ 100 psi	0.8	14-145	PBT Plastic	44.5mm	11.6mm	19mm	0000000	00000
3	6mm	6mm	None (To Atmosphere)	4.79 scfm @ 100 psi	0.15	14-145	PBT Plastic	41.3mm	11.6mm	15.9mm	0000000	00000

Elbow Air-Exhaust Control Valves with Flow Control

Control the flow of exhaust air while also regulating the exhaust air speed. These valves dump exhaust air to the atmosphere without routing it back through a directional control valve. They control flow in one direction as air flows from the inlet to the outlet, and adjust the volume of exhaust air exiting an air cylinder (meter out) to control its speed. Air flows freely in the opposite direction. They have a 90° elbow shape that allows you to install them in tight spaces. The push-to-connect outlet ports are for use with plastic or soft metal tubing; insert tubing into the ports. A muffler reduces exhaust noise. Also known as quick exhaust valves.

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

								Overall
No. of Flow Ports	Inlet Size	For Outlet Tube OD	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Body Material	Lg.	Wd.	Ht.		Each
Threaded Male Inlet × Push-to-Connect Female Outlet
3	1/8 NPT	1/4"	None (To Atmosphere)	14.05	0.44	14-145	PBT Plastic	2 7/8"	11/16"	1 1/16"	00000000	000000
3	1/8 NPT	5/16"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	2 7/8"	15/16"	1 3/16"	00000000	00000
3	1/8 NPT	3/8"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	3 3/8"	15/16"	1 5/16"	00000000	00000
3	1/4 NPT	1/4"	None (To Atmosphere)	14.05	0.44	14-145	PBT Plastic	2 7/8"	11/16"	1 1/8"	00000000	00000
3	1/4 NPT	5/16"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	3 1/4"	15/16"	1 3/8"	00000000	00000
3	1/4 NPT	3/8"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	3 3/8"	15/16"	1 5/8"	00000000	00000
3	1/4 NPT	3/8"	None (To Atmosphere)	47.89	1.5	14-145	PBT Plastic	3 9/16"	15/16"	1 5/8"	00000000	00000
3	3/8 NPT	5/16"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	3 1/4"	15/16"	1 1/8"	00000000	00000
3	3/8 NPT	3/8"	None (To Atmosphere)	24.91	0.78	14-145	PBT Plastic	3 3/8"	15/16"	1 5/16"	00000000	00000
3	3/8 NPT	3/8"	None (To Atmosphere)	51.09	1.6	14-145	PBT Plastic	3 9/16"	1 3/16"	1 3/4"	00000000	00000
3	1/2 NPT	3/8"	None (To Atmosphere)	51.09	1.6	14-145	PBT Plastic	3 9/16"	1 3/16"	1 5/8"	00000000	00000