Metric Valves | McMaster-Carr

0.05
0.06
0.07
0.075
0.08
0.09
0.091
0.1
0.102
0.12
0.13
0.14
0.15
0.16
0.18
0.19
0.2
0.203
0.22
0.23
0.234
0.26
0.29
0.3
0.31
0.33
0.34
0.35
0.36
0.39
0.406
0.407
0.42
0.43
0.46
0.47
0.5
0.53
0.54
0.549
0.56
0.6
0.61
0.65
0.66
0.67
0.711
0.77
0.78
0.8
0.83
0.89
0.9
0.92
0.93
0.96
0.98
1.016
1.24
1.3
1.33
1.36
1.4
1.47
1.524
1.728
1.9
2
2.2
2.5
2.6
2.8
2.88
3
3.2
3.5
3.6
3.8
4
4.5
4.56
4.8
6.7
7
7.2
8.4
9.3
9.5
9.8
10
11
11.9
12.6
13
15
17.4
21
28
29
30
30.8
32.3
36
43
46
48
48.5
49
50
53
66
77
80.9
84
92.4
93
108
119
144.4
160
168
206.8
240
340
370
596.2
896.5
1,305.5
Not Rated

	For Inlet Tube OD For Inlet Tube OD

3.2mm

4 mm

	Inlet Connection Type Inlet Connection Type


Tube	Pipe

	ISO Designation ISO Designation

	Meter Out
	Meter In

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379 Products

Flow-Control Valves

Compact Threaded On/Off Valves

Install these low-profile valves in tight spots. Use with water, oil, air, and inert gas.

Panel-Mount Threaded On/Off Valves

For installation in instrument panels, these valves have threads and a hex nut below the handle. They’re for use with water, oil, air, and inert gas.

Threaded On/Off Valves

Use these valves in general purpose applications with water, oil, air, inert gas, and steam.

Easy-Access Threaded On/Off Valves

Extend your reach in hard-to-access areas—turn these valves on and off using a square ratchet to grasp the hole at the end of the handle. Use with water, oil, air, and inert gas.

On/Off Valves with Push-to-Connect Fittings

Insert tubing into the fittings on these valves—no heat, solder, or flux required. They’re for use with water, oil, air, and inert gas.

On/Off Valves with Yor-Lok Fittings

For extra gripping power and a strong seal, the Yor-Lok fittings on these valves have two sleeves that bite into tubing as you tighten the nut. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. These valves are for use with water, oil, air, and inert gas.

Plastic On/Off Valves with Push-to-Connect
Fittings for Drinking Water

For a lightweight and economical alternative to metal, these valves are made of plastic. Insert tubing into the fittings—no heat, solder, or flux required. All meet NSF/ANSI 61 for use in drinking water systems.

Solenoid On/Off Valves

Suitable for general purpose use.

Threaded Flow-Adjustment Valves

Valves are for use with water, oil, air, inert gas, and steam. They gradually open and close to adjust and regulate flow.

Threaded Precision Flow-Adjustment Valves

Use these valves with water, oil, air, and inert gas. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control.

Threaded Check Valves for Oil and Fuel

Plastic Socket-Connect Check Valves

Also known as backwater valves, these valves prevent backflow of sewage and wastewater in drain, waste, and vent systems.

Threaded Check Valves

For use with threaded pipe, these valves are available with NPT, NPTF, BSPP, BSPT, UNI/UNF (JIC), and metric connections.

Check Valves with Push-to-Connect Fittings

Insert tubing into the fitting—no heat, solder, or flux required.

Fill Valves and Fittings

Air Fill Valves

Also known as Schrader valves, these valves rapidly fill or empty compressed air tanks or pneumatic tires.

Compressed Gas Fill Valves

Mount these valves onto compressed gas tanks.

Compressed Air Control Valves

Elbow Air Flow Control Valves

Mount these valves directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. They control the speed of air-powered equipment by adjusting the volume of airflow.

Inline Air Flow Control Valves

Designed to be mounted inline, these valves can be installed in an easy-to-reach location along your line. They control the speed of air-powered equipment by adjusting the volume of airflow.

Precision-Adjust Air Flow Control Valves

A fine-adjustment dial allows tighter control of airflow and cylinder speed than other flow control valves. They control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting.

Inline Air Flow Control Valves with Flow Indicator

Designed to be mounted inline, these valves can be placed in an easy-to-reach location along your line to control the speed of air-powered equipment by adjusting the volume of airflow. A numeric indicator provides a relative measure of airflow, similar to the volume dial on a speaker, so it's easy to set the same flow rate with each use.

Elbow Air Flow Control Valves with Flow Indicator

A numeric indicator provides a relative measure of airflow, similar to the volume dial on a speaker, so it's easy to set the same flow rate with each use. Mount them directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. They control the speed of air-powered equipment by adjusting the volume of airflow.

Elbow Corrosion-Resistant Air Flow Control Valves

Mount these valves directly to cylinder ports, eliminating additional tubing between the cylinder and valve for better control than inline valves. Made of plastic and stainless steel parts, they have excellent corrosion resistance. They control the speed of air-powered equipment by adjusting the volume of airflow.

Inline Corrosion-Resistant Air Flow Control Valves

Designed to be mounted inline, these valves can be placed in easy-to-reach locations. Made of plastic and stainless steel parts, they have excellent corrosion resistance. They control the speed of air-powered equipment by adjusting the volume of airflow.

Single-Control Two-Direction Air Flow Control Valves

Adjust airflow equally in both directions. These valves regulate the speed of airflow as it enters and exits equipment. They're often used to control the extension and retraction speed of an air cylinder at the same time.

Dual-Control Two-Direction Air Flow Control Valves

Independently control the speed of airflow in two directions. These valves regulate the speed of airflow as it enters or exits equipment, and are often used to control the extension and retraction speed of an air cylinder at the same time.

Air-Operated Air Flow Control
Valves with Safety Shut-Off

Protect air-powered equipment in emergency shut-off situations—when system pressure drops, these valves automatically close to stop cylinder motion, even at mid-stroke. They control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting.

Single-Action Air Directional Control Valves

Create one action with these valves, such as extending a cylinder.

Fast-Switching Single-Action Electrically
Operated Air Directional Control Valves

Run through equipment cycles up to 30% faster than with standard valves. These valves shift between flow positions in 1.7 ms. Also known as 3/2 valves, they create one action, such as extending a cylinder. Apply voltage to the electrical connection to actuate.

Two-Speed Two-Action Electrically Operated
Air Directional Control Valves with Full Shut-Off

These valves close all ports in the off position to stop equipment in a locked position with air pressure holding it in place. Often used to extend and then retract a cylinder at different speeds, they 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. Apply voltage to the electrical connection to actuate.

Fast-Switching Two-Speed Two-Action Electrically
Operated Air Directional Control Valves

Run through equipment cycles up to 30% faster than with standard valves. These valves shift between flow positions in 1.7 ms. Often used to extend and then retract a cylinder at different speeds, they 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.

Two-Speed Two-Action Electrically
Operated 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. Also known as 5/2 valves, they actuate when voltage is applied to the electrical connection.

Washdown-Resistant Electrically
Operated Air Directional Control Valves

Rated IP69K, these valves withstand high-pressure, high-temperature washdowns. Their smooth design keeps out dust, dirt, and contaminants, making them easier to keep clean. Apply voltage to the electrical connection to actuate.

Two-Speed Two-Action Foot-Operated
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. Use your foot to operate them, leaving your hands free to perform other tasks. Also known as 4-way and 5/2 valves.

Single-Action Mechanically Operated
Air Directional Control Valves

A simple automation solution that requires no programming, these valves are activated when an object, such as a box rolling on a conveyor, pushes the actuator. They create one action, such as extending a cylinder. Also known as 3-way and 3/2 valves.

Air-Exhaust Flow Control Valves

Install these valves in the exhaust ports of air directional control valves to control exhaust air speed without needing access to your cylinder.

Quiet Air-Exhaust Control Valves

A muffler reduces exhaust noise. Valves allow airflow into your equipment and then quickly dump 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.

Air Flow Check Valves

These valves open to allow flow in one direction and close when flow stops or reverses direction.

Sliding-Sleeve Air On/Off Valves

Slide the knurled sleeve in one direction to stop flow, and slide it back to start flow again.

Air-Operated Air On/Off Valves

Also known as blocking valves, these valves allow airflow while an air signal is applied to the air pilot. When the signal stops, the valve closes, trapping air in the system.