Push-Button Valves | McMaster-Carr

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	Actuator Style Actuator Style


Palm Button	Push Button

	Valve Operation Valve Operation

Push Button

	Valve Starting Position Valve Starting Position

Normally Closed

Normally Open

	Return Actuation Return Actuation

Spring

Hand

	Actuation Actuation

	Manual

	Flow Pattern Flow Pattern

	3/2
	5/2
	4/2

	For Use With For Use With

	Inlet Pipe Size Inlet Pipe Size

1/8

1/4

	For Air Cylinder Type For Air Cylinder Type

Double Acting

Single Acting

	Outlet Thread Type Outlet Thread Type

NPT

NPTF

UNF

	Inlet Thread Type Inlet Thread Type

NPT

NPTF

UNF

	Valve Function Valve Function

Directional Control

On/Off

	Maximum Pressure Maximum Pressure

	Thread Type Thread Type

NPT

UNF

	Pipe Size Pipe Size

1/8

	Body Material Body Material

	Outlet Pipe Size Outlet Pipe Size

1/8

1/4

	Mount Type Mount Type

Screw

Panel

	System of Measurement System of Measurement

Inch

	Overall Length Overall Length

	Outlet Connection Type Outlet Connection Type


Pipe	Tube

	For Panel Cutout Diameter For Panel Cutout Diameter

	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

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About On/Off Valves

Matching Flow Diagrams to Replace an Air Directional Control Valve

Choosing an Air Directional Control Valve

With
Compact
Push Button

With Mushroom Push Button

Often used in testing and sampling applications, these valves open and close with the push of a button. They’re also known as push-button valves and are designed for installation in tight spots.

Normally open valves close when the button is pushed and spring open when the button is released.

Normally closed valves open when the button is pushed and spring closed when the button is released.

Valves with an exhaust port release media through a small, secondary output when they are closed. When valves are open, the exhaust port is closed.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

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

Brass Body

Valve Type: Stem
For Use With: Air, Oil, Water
Seal Material: Buna-N Rubber

						Compact Push Button		Mushroom Push Button
Pipe Size	Thread Size	Flow Coefficient (Cv)	Max. Pressure	Temperature Range, °F	Port-to-Port Lg.		Each		Each
Normally Open
NPT Female × NPT Female
1/8	__	0.21	150 psi @ 180° F	35° to 230°	9/16"	0000000	000000	0000000	000000
UNF Female × UNF Female
__	10-32	0.18	150 psi @ 180° F	35° to 230°	5/16"	000000	00	0000000	00000
Normally Closed
NPT Female × NPT Female
1/8	__	0.44	300 psi @ 180° F	35° to 230°	9/16"	0000000	00000	0000000	00000
UNF Female × UNF Female
__	10-32	0.12	300 psi @ 180° F	35° to 230°	5/16"	0000000	00000	0000000	00000

Brass Body with Exhaust Port

Valve Type: Stem
For Use With: Air
Seal Material: Buna-N Rubber

				Compact Push Button		Mushroom Push Button
Pipe Size	Max. Pressure	Temperature Range, °F	Port-to-Port Lg.		Each		Each
Normally Open
NPT Female × NPT Female
1/8	150 psi @ 180° F	35° to 230°	9/16"	0000000	000000	0000000	000000
Normally Closed
NPT Female × NPT Female
1/8	300 psi @ 180° F	35° to 230°	9/16"	0000000	00000	0000000	00000

Two-Speed Two-Action Air Directional Control Valves

Often used to extend and then retract a cylinder at different speeds, these valves create two actions and have two exhaust ports, which allows you to control the speed of each action by attaching a flow control valve to each exhaust port. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. Also known as 4-way and 5/2 valves.

Valves with spring return actuation return to their original position as soon as you release the actuator.

Valves with hand return actuation stay actuated and return to their original position only when you move the actuator again.

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.

									O'all			For Panel Cutout
	No. of Flow Ports	Inlet Size	Outlet Size	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating, in. of Hg	Lg.	Wd.	Ht.	Dia.	Mounting Fasteners Included		Each
Threaded Female Inlet × Threaded Female Outlet
Spring Return Actuation
K	5	1/4 NPT	1/4 NPT	Threaded	32.5	0.98	0-145	26.5	1 1/8"	1 7/8"	5 3/4"	7/8"	No	0000000	0000000
K	5	1/4 NPT	1/4 NPT	Threaded	53	1.6	0-150	29	2 1/4"	1 3/8"	7"	7/8"	Yes	0000000	00000
L	5	1/8 NPT	1/8 NPT	Threaded	14	0.24	25-125	Not Rated	1 3/8"	1 3/8"	3 5/8"	1/2"	No	00000000	000000
N	5	10-32 UNF	10-32 UNF	Threaded	15.3	0.23	0-125	Not Rated	3/4"	11/16"	2 5/8"	1/2"	Yes	00000000	00000
N	5	10-32 UNF	10-32 UNF	Threaded	16	0.23	0-125	Not Rated	3/4"	11/16"	2 5/8"	1/2"	Yes	00000000	00000
P	5	1/8 NPT	1/8 NPT	Threaded	16	0.37	0-125	Not Rated	1 1/4"	5/8"	2 5/8"	1/2"	Yes	00000000	00000
Q	5	1/8 NPT	1/8 NPT	Threaded	14	0.24	25-125	Not Rated	1 5/8"	1 5/8"	3/4"	1 1/4"	No	00000000	000000
R	5	1/8 NPT	1/8 NPT	Threaded	10.5	0.186	0-150	28	1 1/4"	5/8"	2 5/8"	1/2"	Yes	00000000	00000
Hand Return Actuation
K	5	1/4 NPT	1/4 NPT	Threaded	32.5	0.98	0-145	26.5	1 1/8"	1 7/8"	6 1/8"	7/8"	No	0000000	000000
K	5	1/4 NPT	1/4 NPT	Threaded	53	1.6	0-150	29	2 1/4"	1 3/8"	7 1/4"	7/8"	Yes	0000000	000000
L	5	1/8 NPT	1/8 NPT	Threaded	25	0.8	0-120	Not Rated	7/8"	1 3/8"	3 7/8"	5/8"	No	00000000	00000
M	5	1/8 NPT	1/8 NPT	Threaded	19	0.34	15-150	Not Rated	1 1/2"	1 1/2"	4 1/2"	1 1/4"	__	00000000	000000
S	5	1/4 NPT	1/4 NPT	Threaded	56	1	40-120	Not Rated	3"	1 7/8"	2"	__	No	0000000	000000

Two-Hand Two-Action Air Directional Control Valves

Since both hands are required to simultaneously press the buttons, these valves protect workers from accidental machinery start-up. Also known as 4-way and 4/2 valves, they create two actions, such as extending and then retracting a double-acting cylinder. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. Return actuation is by spring, so valves return to their original position as soon as you release the actuator.

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.

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

											Overall
Actuation Force, oz.	No. of Flow Ports	Inlet Size	For Inlet Tube OD	Outlet Size	For Outlet Tube OD	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	Mounting Fasteners Included		Each
Threaded Female Inlet × Threaded Female Outlet
6	4	1/4 NPTF	1/4"	1/4 NPTF	1/4"	Threaded	56	1	70-100	Not Rated	10 1/2"	3 1/2"	3 3/16"	No	00000000	000000000
18	4	1/4 NPTF	1/4"	1/4 NPTF	1/4"	Threaded	56	1	70-100	Not Rated	10 1/2"	3 1/2"	3 3/16"	No	00000000	00000000

Single-Action Air Directional Control Valves

Manually control these valves by pushing or turning the actuator. Also known as 3-way or 3/2 valves, they create one action, such as extending a cylinder. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. In the off position, they exhaust air pressure from the system, allowing equipment to reset so the action can be repeated. Valves without an exhaust connection exhaust air to the atmosphere.

Normally closed valves block airflow until actuated. Valves that are both normally closed and normally open can be installed to block airflow, or allow air to flow until actuated.

Valves with hand return actuation stay actuated and go back to their starting position only when you move the actuator again. Valves with spring return actuation go back to their starting position as soon as you release the actuator.

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

Threaded Female Inlet × Threaded Female Outlet

										Overall			For Panel Cutout
	No. of Flow Ports	Inlet Size	Outlet Size	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating, in. of Hg	Actuator Color	Lg.	Wd.	Ht.	Dia.	Wd.	Lg.	Mounting Fasteners Included		Each
Normally Closed Flow Positions
Hand Return Actuation
Q	3	1/8 NPT	1/8 NPT	Threaded	10.7	0.34	0-145	26.5	Red	4 1/2"	7/8"	1 3/8"	1 1/4"	__	__	No	00000000	0000000
R	3	1/4 NPT	1/4 NPT	Threaded	32.5	0.98	0-145	26.5	Black	1 1/8"	1 7/8"	5 1/4"	7/8"	__	__	No	0000000	000000
R	3	1/4 NPT	1/4 NPT	Threaded	53	1.6	0-150	29	Black	2 1/4"	1 3/8"	6 3/8"	7/8"	__	__	Yes	0000000	000000
Spring Return Actuation
M	3	1/8 NPT	1/8 NPT	Threaded	6	0.11	0-120	23	Black	1 3/4"	3/4"	2 3/8"	1/2"	3/4"	1 3/4"	Yes	0000000	00000
N	3	1/8 NPT	1/8 NPT	Threaded	6	0.11	0-120	23	Red	2 3/8"	2 3/8"	3 5/16"	1 1/4"	3/4"	1 3/4"	Yes	0000000	000000
P	3	1/8 NPT	1/8 NPT	Threaded	6	0.106	0-100	Not Rated	Black	2 1/4"	2 1/4"	2 1/2"	2 1/4"	__	__	No	0000000	00000
P	3	1/8 NPT	1/8 NPT	Threaded	6	0.106	0-100	Not Rated	Green	2 1/4"	2 1/4"	2 1/2"	2 1/4"	__	__	No	0000000	00000
P	3	1/8 NPT	1/8 NPT	Threaded	6	0.106	0-100	Not Rated	Red	2 1/4"	2 1/4"	2 1/2"	2 1/4"	__	__	No	0000000	00000
R	3	1/4 NPT	1/4 NPT	Threaded	32.5	0.98	0-145	26.5	Black	1 1/8"	1 7/8"	4 7/8"	7/8"	__	__	No	0000000	000000
R	3	1/4 NPT	1/4 NPT	Threaded	53	1.6	0-150	29	Black	2 1/4"	1 3/8"	5 7/8"	7/8"	__	__	Yes	0000000	00000
S	3	10-32 UNF	10-32 UNF	Threaded	16.2	0.25	0-125	26	__	5/8"	5/8"	1 7/8"	1/2"	__	__	Yes	0000000	00000
T	3	10-32 UNF	10-32 UNF	__	14.4	0.24	0-125	Not Rated	Black	5/8"	5/8"	1 7/8"	1/2"	__	__	Yes	00000000	00000
V	3	1/8 NPT	1/8 NPT	__	17.8	0.29	0-125	Not Rated	Black	1 1/4"	5/8"	2 1/8"	1/2"	__	__	Yes	00000000	00000
W	3	1/8 NPT	1/8 NPT	Threaded	6	0.11	0-120	23	Black	1 7/8"	1 5/8"	2 1/2"	1 1/4"	3/4"	1 3/4"	Yes	0000000	000000

Threaded Male Inlet × Threaded Female Outlet

								Overall
	No. of Flow Ports	Inlet Size	Outlet Size	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included		Each
Normally Closed Flow Positions
Spring Return Actuation
T	3	1/8 NPT	10-32 UNF	14.4	0.24	0-125	Not Rated	5/8"	5/8"	1 7/8"	1/2"	Yes	00000000	000000
V	3	1/8 NPT	1/8 NPT	17.8	0.29	0-125	Not Rated	1 1/4"	5/8"	2 1/8"	1/2"	Yes	00000000	00000

Push-to-Connect Female Inlet × Push-to-Connect Female Outlet

							Overall
	No. of Flow Ports	For Inlet Tube OD	For Outlet Tube OD	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included	Max. Flow Rate, scfm @ 100 psi		Each
Normally Closed Flow Positions
Spring Return Actuation
V	3	1/4"	1/4"	0.29	0-125	Not Rated	1 1/4"	5/8"	2 1/4"	1/2"	Yes	17.8	00000000	000000

Barbed Male Inlet × Threaded Female Outlet

								Overall
	No. of Flow Ports	For Inlet Tube ID	Outlet Size	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included		Each
Normally Closed Flow Positions
Spring Return Actuation
Z	3	0.17"	10-32 UNF	14.4	0.24	0-125	Not Rated	5/8"	5/8"	2"	1/2"	Yes	00000000	000000

Barbed Male Inlet × Barbed Male Outlet

									Overall
	No. of Flow Ports	For Inlet Tube ID	For Outlet Tube ID	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating, in. of Hg	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included		Each
Normally Open/Normally Closed Flow Positions
Spring Return Actuation
U	3	1/16"	1/16"	Barbed	1.4	0.025	0-100	Not Rated	3/8"	3/8"	1 1/4"	1/4"	Yes	00000000	000000

Remote-Location Two-Hand Single-Action Air Directional Control Valves

The push buttons that operate these valves are separate from the logic unit, allowing you to position them away from machinery. Since both hands are required to simultaneously press the buttons, they protect workers from accidental machinery start-up. Also known as 3-way and 3/2 valves, they create one action, such as extending a cylinder. Valves direct airflow from the inlet to your equipment and exhaust return airflow to create motion. They're normally closed to block airflow until actuated. Return actuation is by spring, so valves return to their starting position as soon as you release the actuator. In the off position, they exhaust air from the system, allowing equipment to reset so the action can be repeated.

Note: Valve is sold as a complete unit, consisting of one logic unit and two signal valves. Port size given is for the logic unit. Signal valve port size is 1/8 NPT female.

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.

								Overall
No. of Flow Ports	For Inlet Tube OD	For Outlet Tube OD	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included		Each
Push-to-Connect Female Inlet × Push-to-Connect Female Outlet
3	1/4"	1/4"	Push to Connect	3.8	0.11	36-145	Not Rated	2 1/2"	1 3/4"	2 3/4"	1 1/8"	No	0000000	0000000

Replacement Logic Units	0000000	Each	0000000
Replacement Signal Valves	0000000	Each	00000

Two-Hand Single-Action Air Directional Control Valves

Since both hands are required to simultaneously press the buttons, these valves protect workers from accidental machinery start-up. Also known as 3-way and 3/2 valves, they create one action, such as extending a cylinder. Valves direct airflow from the inlet to your equipment and exhaust return airflow to create motion. They can be installed normally open to allow airflow until actuated, or installed to block airflow and until actuated. Return actuation is by spring, so valves return to their starting position as soon as you release the actuator. In the off position, they exhaust air pressure from the system to the atmosphere, allowing equipment to reset so the action can be repeated.

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.

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

								Overall
Actuation Force, oz.	No. of Flow Ports	Inlet Size	Outlet Size	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating	Lg.	Wd.	Ht.	Mounting Fasteners Included		Each
Threaded Female Inlet × Threaded Female Outlet
6	3	1/8 NPT	1/8 NPT	6	0.11	70-100	Not Rated	10 1/2"	3 1/2"	3 3/16"	No	00000000	000000000
18	3	1/8 NPT	1/8 NPT	6	0.11	70-100	Not Rated	10 1/2"	3 1/2"	3 3/16"	No	00000000	00000000

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About On/Off Valves

Matching Flow Diagrams to Replace an Air Directional Control Valve

Choosing an Air Directional Control Valve

Fast-Acting Compact Threaded On/Off Valves

Two-Speed Two-Action Air Directional Control Valves

Two-Hand Two-Action Air Directional Control Valves

Single-Action Air Directional Control Valves

Remote-Location Two-Hand Single-Action Air Directional Control Valves

Two-Hand Single-Action Air Directional Control Valves