4 Valves | McMaster-Carr

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98 Products

On/Off Valves

Threaded On/Off Valves

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

Easy-Maintenance Threaded On/Off Valves

Maintain and repair these valves without unthreading pipe connections. They have a three-piece bolted body that disassembles inline for access to internal components. Use with water, oil, air, inert gas, and steam.

Plastic Threaded On/Off Valves

Use these valves with water, air, and inert gas.

Flanged On/Off Valves

Bolt these valves to ANSI flanges. They’re for use with water, oil, air, inert gas, and steam.

Compact Flanged On/Off Valves

Also known as wafer ball valves, these combine the slim body of a butterfly valve with the high flow rates of a flanged ball valve. They bolt to ANSI flanges. Use with water, oil, air, inert gas, and steam.

Easy-Maintenance Socket-Connect On/Off Valves

Clean and maintain these valves without removing welded connections. They have a three-piece bolted body that disassembles inline for easy access to internal components. Use with water, oil, air, inert gas, and steam.

Socket-Connect On/Off Valves for Drinking Water

Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves meet NSF/ANSI 61, which means they’re safe to use with drinking water systems.

Easy-to-Install Socket-Connect
On/Off Valves for Drinking Water

For fast installation and removal from pipelines, these valves have union fittings that disassemble into multiple pieces. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves meet NSF/ANSI 61 for use in drinking water lines.

Plastic Threaded On/Off Valves for Drinking Water

These valves meet NSF/ANSI 61 for use in drinking water lines.

Easy-to-Install Plastic Threaded
On/Off Valves for Drinking Water

Disassemble the union fittings on these valves for fast installation and removal from your pipeline. All meet NSF/ANSI 61 for use with drinking water.

Easy-to-Install Threaded
On/Off Valves for Chemicals

For fast installation and removal from pipelines, these valves have union fittings that disassemble into multiple pieces. All have a fluoroelastomer seal and a plastic body that can stand up to aggressive and corrosive solutions in chemical-processing applications.

Easy-Maintenance Threaded
On/Off Valves for Chemicals

The three-piece bolted body comes apart for access to internal components without unthreading pipe connections and removing the valve from your line. Seal is fluoroelastomer and body is polypropylene for excellent resistance to aggressive and corrosive solutions in chemical-processing applications.

Easy-to-Install Socket-Connect
On/Off Valves for Chemicals

Union fittings on both ends of these valves disassemble for fast installation and removal from your pipeline. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves have a fluoroelastomer seal and a plastic body that can withstand aggressive and corrosive solutions in chemical-processing applications.

Gradual On/Off Valves

Threaded Gradual On/Off Valves

Flanged Gradual On/Off Valves

Flanged Gradual On/Off Valves
for Thick Liquids and Dry Materials

These valves have a sharp gate that slices through thick slurries, wastewater, dry bulk solids, and other materials that would clog other gradual on/off valves.

Plastic Socket-Connect Gradual On/Off Valves

Actuated On/Off Valves

Flanged Air-Driven On/Off Valves

Also known as butterfly valves.

Air-Driven On/Off Valves for Fuel

Use these valves to safely transfer fuel and oil.

Flanged Motor-Driven On/Off Valves

Also known as butterfly valves.

Motor-Driven On/Off Valves for Fuel

Use these valves to safely transfer fuel and oil.

Flow-Adjustment Valves

Flow-Adjustment Valves with Grooved-End Fittings

Commonly used in water service pipelines and HVAC systems, these valves have grooved ends that connect to pipe with a clamp for easy installation. Since there’s no heat or threading required, they provide quick access to your pipeline for routine maintenance. Use with water. They gradually open and close to adjust and regulate flow.

Flanged Flow-Adjustment Valves

These valves are for use with water, oil, air, and inert gas. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Lightweight Flanged Flow-Adjustment Valves

An aluminum body provides strength and durability at half the weight of other metal flanged flow-adjustment valves. These valves are for use with water, oil, air, and inert gas. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Extended-Life Flanged Flow-Adjustment Valves

For a longer service life than other flanged flow-adjustment valves, these are designed to open and close with minimal wear on internal components. Use with water, air, and inert gas. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Plastic Flanged Flow-Adjustment Valves

Often used in low-pressure water pipelines, these valves have a plastic body for the lightest weight of our flanged flow-adjustment valves. Use them with water. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Flanged Flow-Adjustment Valves for Chemicals

Metal provides more durability than plastic. With seats that can stand up to aggressive and corrosive solutions, these valves are often used in chemical-processing applications. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Plastic Flanged Flow-Adjustment
Valves for Chemicals

In addition to fluoroelastomer seats that resist a wide range of chemicals, these valves have no metal parts to corrode, so they’re often used for chemical-processing applications in corrosive conditions. All bolt to flanges to adjust and regulate flow in flanged pipelines.

Flanged Flow-Adjustment Valves for Drinking Water

These valves meet NSF/ANSI 61 for use with drinking water. They bolt to flanges to adjust and regulate flow in flanged pipelines.

Diverting Valves

Flanged Diverting Valves

Bolt these valves to flanges to divert flow between ports in flanged pipelines. They’re for use with water, oil, air, and inert gas.

Flanged Air-Driven Diverting Valves

Bolt these valves to flanges. Use them with water, oil, air, and inert gas. All operate on compressed air to automatically divert flow between ports more quickly than motor-driven valves. You must control the air to the actuator using either an electric pilot valve or a manual on/off valve.

Check Valves

Flange-Mount Check Valves

Sandwich these valves between two ANSI flanges for backflow prevention at a fraction of the weight of flanged check valves and a reduced pipeline footprint.

Compact Flange-Mount Check Valves

Less than half the end-to-end length of standard flange-mount check valves, these can be installed in pipelines with limited clearance.

Flanged Check Valves

Bolt to ANSI flanges.

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 Harsh Chemicals

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

Heavy Duty Threaded Check
Valves for Drinking Water

For more durability than plastic, these valves have a metal body.

Flange-Mount Check Valves for Drinking Water

Sandwich these valves between ANSI flanges.

Flange-Mount Check Valves for Oil and Fuel

Install these valves between ANSI flanges.

Union Fittings for Flow-Control Valves

Attach these valve bodies to your actuator to automatically or manually control flow in your line.

Flow-Control Flange Unions

Measure, throttle, and regulate the flow of liquids and gases in your line by adding an orifice plate to these unions.

Flange-Mount Pressure-Relief Discs

Install these discs within the bolt circle of ANSI Class 150 flanges.

Floor Drain Backflow Preventers

Put an end to water damage from backed-up sewers. When water backs up, the rubber float will rise to seal off the drain. When water recedes, the float will drop for normal drainage.

Suction Strainers with Backflow-Prevention Valve

Also known as foot valves, these strainers stop particles from entering your line while preventing backward flow. They are commonly used with reservoirs and tanks.