Speed Control Mufflers | McMaster-Carr

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60 Products

Flow-Control Mufflers

Adjust the flow by turning the screw. Use these mufflers with air-powered tools and cylinders to reduce noise and filter exhaust fumes.

Mufflers with External Hex Drive


NPT Brass	NPT 316 Stainless Steel	BSPP Nylon	Metric Nylon

For mufflers with an external hex drive, twist the screw and then tighten the hex nut with a wrench to secure. These mufflers are more secure than those with a thumb screw.

												Each
	Pipe Size	Thread Size	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	For Use With	Removes Particle Size Down To, μm	Noise Reduction Rating, dB	Features		1-19	20-Up
NPT Male Brass Fitting



		1/8	—	20 scfm @ 100 psi	300	300	1 5/16"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K31	00000	00000


		1/8	—	30 scfm @ 100 psi	300	300	1 9/16"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K41	0000	0000
		1/4	—	30 scfm @ 100 psi	300	300	1 9/16"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K32	0000	0000
		1/4	—	40 scfm @ 100 psi	300	300	1 5/8"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K42	0000	0000
		3/8	—	40 scfm @ 100 psi	300	300	1 5/8"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K33	0000	0000
		3/8	—	60 scfm @ 100 psi	300	300	2"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K43	00000	0000
		1/2	—	60 scfm @ 100 psi	300	300	2"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K34	00000	0000
		1/2	—	70 scfm @ 100 psi	300	300	2 3/8"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K44	00000	00000
		3/4	—	70 scfm @ 100 psi	300	300	2 3/8"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K35	00000	00000
		1	—	100 scfm @ 100 psi	300	300	2 1/2"	Air, Inert Gas	40	17 to 20	Adjustable Airflow	9834K36	00000	00000


		NPT Male 316 Stainless Steel Fitting



				1/8	—	12 scfm @ 100 psi	300	390	1 1/4"	Air, Inert Gas	70	—	Adjustable Airflow	9834K61	00000	00000


				1/4	—	25 scfm @ 100 psi	300	390	1 9/16"	Air, Inert Gas	70	—	Adjustable Airflow	9834K62	00000	00000
				3/8	—	30 scfm @ 100 psi	300	390	1 5/8"	Air, Inert Gas	70	—	Adjustable Airflow	9834K63	00000	00000
				1/2	—	50 scfm @ 100 psi	300	390	1 15/16"	Air, Inert Gas	70	—	Adjustable Airflow	9834K64	00000	00000
				3/4	—	70 scfm @ 100 psi	300	390	2 1/4"	Air, Inert Gas	70	—	Adjustable Airflow	9834K65	00000	00000
				1	—	100 scfm @ 100 psi	300	390	2 3/8"	Air, Inert Gas	70	—	Adjustable Airflow	9834K66	00000	00000


				BSPP Male Nylon Fitting



						1/8	—	51 scfm @ 100 psi	145	210	13/16"	Air, Inert Gas	75	10 to 20	Adjustable Airflow	9834K52	0000	0000


						1/4	—	5.25 scfm @ 100 psi	145	175	1 3/16"	Air, Inert Gas	50	10 to 20	Adjustable Airflow	9834K531	00000	00000
						3/8	—	170 scfm @ 100 psi	145	210	1 1/2"	Air, Inert Gas	75	10 to 20	Adjustable Airflow	9834K54	00000	00000


						Metric Male Nylon Fitting



								—	M5	19 scfm @ 100 psi	145	210	5/8"	Air, Inert Gas	75	10 to 20	Adjustable Airflow	9834K51	0000	0000

Mufflers with Thumb Screw

NPT

Bronze

with

Thumb

Screw

For mufflers with a thumb screw, twist the screw and friction secures them in place—no need to use a wrench. Often used in valve exhaust ports, these mufflers are not as secure as those with a nut.

											Each
	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	For Use With	Removes Particle Size Down To, μm	Noise Reduction Rating, dBA	Features		1-19	20-Up
NPT Male Bronze Fitting



		1/8	6 scfm @ 100 psi	215	570	1 1/16"	Air, Inert Gas	35	17 to 20	Adjustable Airflow, Friction Lock	9834K71	00000	00000


		1/8	6 scfm @ 100 psi	215	570	1 3/8"	Air, Inert Gas	35	17 to 20	Adjustable Airflow, Friction Lock	9834K73	0000	0000
		1/4	9 scfm @ 100 psi	215	570	1 3/16"	Air, Inert Gas	35	17 to 20	Adjustable Airflow, Friction Lock	9834K72	0000	0000
		1/4	9 scfm @ 100 psi	215	570	1 9/16"	Air, Inert Gas	35	17 to 20	Adjustable Airflow, Friction Lock	9834K74	0000	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 exhaust to the atmosphere and include a muffler to reduce the exhaust noise.

Flow Coefficient (Cv)—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.

								Overall
	No. of Flow Ports	Inlet Size	Max. Flow Rate @ Pressure	Flow Coefficient (Cv)	Max. Pressure, psi	Body Material	Hex Size	Dia	Lg.		Each
Threaded Male Inlet







				Flow-Adjustment Dial

				2	1/8 BSPP	35 scfm @ 100 psi	1.016	145	Aluminum	—	16 mm	46 mm	9164K15	000000


				2	1/4 BSPP	52.5 scfm @ 100 psi	1.524	145	Aluminum	—	19.5 mm	63.3 mm	9164K16	00000
				2	3/8 BSPP	59.5 scfm @ 100 psi	1.728	145	Aluminum	—	25 mm	95.3 mm	9164K17	00000
				2	1/2 BSPP	141.26 scfm @ 100 psi	2.982	145	Aluminum	—	28 mm	130 mm	9164K109	00000
				2	3/4 BSPP	268.39 scfm @ 100 psi	5.965	145	Aluminum	—	38 mm	157 mm	9164K111	00000




						Flow-Adjustment Slotted Screw

						2	1/8 NPT	19.21 scfm @ 100 psi	0.52	145	Aluminum	9/16"	5/8"	1 5/16"	9164K11	00000


						2	1/8 BSPP	19.21 scfm @ 100 psi	0.52	145	Aluminum	14 mm	15 mm	27 mm	9164K101	00000
						2	1/4 NPT	37 scfm @ 100 psi	1	145	Aluminum	11/16"	3/4"	1 5/8"	9164K12	00000
						2	1/4 BSPP	37 scfm @ 100 psi	1	145	Aluminum	17 mm	18.2 mm	32.1 mm	9164K102	00000
						2	3/8 NPT	74 scfm @ 100 psi	2	145	Aluminum	7/8"	1"	1 15/16"	9164K13	00000
						2	3/8 BSPP	74 scfm @ 100 psi	2	145	Aluminum	22 mm	25 mm	41.1 mm	9164K103	00000
						2	1/2 NPT	133.2 scfm @ 100 psi	3.6	145	Aluminum	1 1/16"	1 1/16"	2 1/4"	9164K14	00000
						2	1/2 BSPP	133.2 scfm @ 100 psi	3.6	145	Aluminum	24 mm	27 mm	44.6 mm	9164K104	00000




								Flow-Adjustment Thumb Screw

								2	1/8 BSPT	10.59 scfm @ 100 psi	0.201	145	Brass	10 mm	14 mm	35.8 mm	9164K107	00000


								2	1/4 BSPT	17.66 scfm @ 100 psi	0.313	145	Brass	14 mm	18 mm	37 mm	9164K108	00000
								2	M5 Metric	3.35 scfm @ 100 psi	0.06	145	Brass	8 mm	10 mm	23.4 mm	9164K105	00000
								2	M7 Metric	4.24 scfm @ 100 psi	0.075	145	Brass	8 mm	10 mm	26.9 mm	9164K106	00000

Clog-Resistant Mufflers

Style

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.

Mufflers with Pipe Connection

Style

Style A—Style A have a screw on top to adjust air flow.

	Max. Temp., ° F	Ht.	For Use With	Body Material	Removes Particle Size Down To, μm	Noise Reduction Rating, dBA		Each
Style A







	NPT Male Zinc-Plated Steel Fitting

	1/8	35 scfm @ 100 psi	150	400	1 1/16"	Air	Zinc-Plated Steel	900	12 to 15	9869K91	00000


	1/4	52 scfm @ 100 psi	150	400	1 5/8"	Air	Zinc-Plated Steel	900	12 to 15	9869K92	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 inlet port is for use with plastic or soft metal tubing; insert tubing into the port. A muffler reduces exhaust noise. Also known as quick exhaust valves.

									Overall
	No. of Flow Ports	For Inlet Tube OD	Outlet Size	For Outlet Tube OD	Max. Flow Rate @ Pressure	Flow Coefficient (Cv)	Pressure Range, psi	Body Material	Lg.	Wd.	Ht.		Each
Push to Connect Female Inlet × Threaded Male Outlet







				Flow-Adjustment Dial

				3	1/4"	1/8 NPT	1/4"	14.05 scfm @ 100 psi	0.44	14 to 145	Polybutylene	2 7/8"	11/16"	1 1/16"	62135K11	000000


				3	1/4"	1/4 NPT	1/4"	14.05 scfm @ 100 psi	0.44	14 to 145	Polybutylene	2 7/8"	11/16"	1 1/8"	62135K14	00000
				3	5/16"	1/8 NPT	5/16"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	2 7/8"	15/16"	1 3/16"	62135K12	00000
				3	5/16"	1/4 NPT	5/16"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	3 1/4"	15/16"	1 3/8"	62135K15	00000
				3	5/16"	3/8 NPT	5/16"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	3 1/4"	15/16"	1 1/8"	62135K18	00000
				3	3/8"	1/8 NPT	3/8"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	3 3/8"	15/16"	1 5/16"	62135K13	00000
				3	3/8"	1/4 NPT	3/8"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	3 3/8"	15/16"	1 5/8"	62135K16	00000
				3	3/8"	1/4 NPT	3/8"	47.89 scfm @ 100 psi	1.5	14 to 145	Polybutylene	3 9/16"	15/16"	1 5/8"	62135K17	00000
				3	3/8"	3/8 NPT	3/8"	24.91 scfm @ 100 psi	0.78	14 to 145	Polybutylene	3 3/8"	15/16"	1 5/16"	62135K19	00000
				3	3/8"	3/8 NPT	3/8"	51.09 scfm @ 100 psi	1.6	14 to 145	Polybutylene	3 9/16"	1 3/16"	1 3/4"	62135K21	00000
				3	3/8"	1/2 NPT	3/8"	51.09 scfm @ 100 psi	1.6	14 to 145	Polybutylene	3 9/16"	1 3/16"	1 5/8"	62135K22	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 Pipe Size	For Outlet Tube ID	Air Pilot Size	Max. Flow Rate @ 100 psi, scfm	Flow Coefficient (Cv)	Body Material	Lg.	Wd.	Ht.	Lowest Avail. Pressure, psi	Highest Avail. Pressure, psi		Each
Threaded Female Inlet × Barbed Male Outlet × Threaded Male Air Pilot



		4	NPT, 1/8	1/4"	1/4 NPT	20	Not Rated	Brass	2 7/8"	2 1/16"	3 3/8"	40 to 50	240 to 250	3206N11	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	Max. Flow Rate @ Pressure	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"	6.82 scfm @ 100 psi	0.54	14 to 145	Polybutylene	1 5/8"	1/2"	5/8"	6639T22	000000


		3	1/4"	1/4"	11.36 scfm @ 100 psi	0.8	14 to 145	Polybutylene	2"	1/2"	3/4"	6639T23	00000
		3	4 mm	4 mm	4.47 scfm @ 100 psi	0.14	14 to 145	Polybutylene	39.7 mm	10 mm	14.3 mm	6639T11	00000
		3	6 mm	6 mm	4.79 scfm @ 100 psi	0.15	14 to 145	Polybutylene	41.3 mm	11.6 mm	15.9 mm	6639T12	00000
		3	6 mm	6 mm	11.36 scfm @ 100 psi	0.8	14 to 145	Polybutylene	44.5 mm	11.6 mm	19 mm	6639T21	00000