Instrumentation Valves | McMaster-Carr

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292 Products

About On/Off Valves

High-Purity Tank-Mount
Pressure-Regulating Valves for Inert Gas

Reduce contaminants in gases used in research sample systems, emission monitoring systems, chromatography, and other high-purity applications. These valves have a 316 stainless steel and brass body with a smooth finish to reduce dust collection and internal components designed to protect the seal and diaphragm from contamination.

Tank-Mount High-Pressure-Regulating
Valves for Air and Inert Gas

Often used for pressure-vessel testing and other high-pressure applications, these valves can handle at least seven times the outlet pressure of standard tank-mount pressure-regulating valves.

High-Purity Tank-Mount
Pressure-Regulating Valves for Fuel Gases

Designed to reduce contaminants in high-purity applications using hydrogen and methane gas, these valves have a stainless steel and brass body with a smooth finish to reduce dust collection and internal components designed to protect the seal and diaphragm from contamination.

Flow-Control Valves

Panel-Mount On/Off Valves with Yor-Lok Fittings

Easily access the handle of these valves while protecting your line behind an instrument panel. Threads and a hex nut below the handle allow you to install these valves in instrument panels. For extra gripping power and a strong seal, they have Yor-Lok fittings with two sleeves that bite into tubing as you tighten the nut. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings.

Fast-Acting Panel-Mount On/Off
Valves with Yor-Lok Fittings

Flip the toggle to quickly turn these valves on and off. All have threads and a hex nut below the handle for installation in instrument panels. For extra gripping power and a strong seal, they have Yor-Lok fittings with 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.

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.

Panel-Mount Threaded On/Off Valves

Control the flow of your line while it’s protected behind an instrument panel. These valves have threads and a hex nut below the handle, so it sticks out of your panel for access. They’re for use with water, oil, air, and inert gas.

Fast-Acting Panel-Mount Threaded On/Off Valves

Start or stop flow with the flip of a toggle switch or the push of a button. They fit through a cutout, so the body of the valve stays safe inside your instrumentation panel.

High-Pressure Threaded On/Off Valves

These valves are rated for at least three times the pressure of standard threaded valves. Use with water, oil, air, inert gas, and steam.

On/Off Valves with Yor-Lok Fittings for Fuel

For extra gripping power and a strong seal, these valves have Yor-Lok fittings with two sleeves that bite into tubing as you tighten the nut. They are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. Use with diesel fuel, fuel oil, gasoline, and kerosene.

Panel-Mount Threaded On/Off
Valves for Drinking Water

Protect your drinking water line behind an instrument panel while keeping the handle handy. These valves have a nut that threads onto the stem to mount the handle onto the panel.

Precision Flow-Adjustment
Valves with Yor-Lok Fittings

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

Panel-Mount Threaded Precision
Flow-Adjustment Valves

For installation in instrument panels, these valves have a hex nut and threads below the handle. Use 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.

Panel-Mount High-Pressure Threaded
Precision Flow-Adjustment Valves

Designed for high-pressure instrumentation applications, these valves are rated for up to 10,000 psi and have a hex nut and threads below the handle for panel mounting. Use 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.

Precision Flow-Adjustment Valves
with Yor-Lok Fittings for Steam

For extra gripping power and a strong seal, these valves have Yor-Lok fittings with two sleeves that bite into tubing as you tighten the nut. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control.

Precision Flow-Adjustment Valves
with Yor-Lok Fittings for Chemicals

For extra gripping power and a strong seal, these valves have Yor-Lok fittings with two sleeves that bite into tubing as you tighten the nut. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings. The 316 stainless steel body and seal, the PTFE seat and packing, and the Monel needle can withstand aggressive and corrosive solutions in chemical-processing applications. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control.

Panel-Mount Noncontact Flow-Adjustment Valves

For installation in instrument panels, these valves have a hex nut and threads below the handle. They press down on the outside of tubing to adjust flow without contacting the process media.

Panel-Mount Threaded Diverting Valves

Threads and a hex nut below the handle let you install these valves through instrument panels. They are for use with water, oil, air, and inert gas. All divert flow between ports.

Compact Threaded Diverting Valves

A metal body provides more strength and durability than plastic. These valves have a low-profile handle and a short end-to-end length to fit in tight spots. All are for use with water, oil, air, and inert gas. They divert flow between ports.

Diverting Valves with Yor-Lok Fittings

These valves divert flow between ports. Use with water, oil, air, and inert gas.

Check Valves with Yor-Lok Fittings

Two sleeves give the fittings extra gripping power. They bite into tubing as you tighten the nut to form a strong seal. All are compatible with Swagelok®, Let-Lok, and Parker A-Lok fittings.

About On/Off Valves

Pressure-Regulating Valves

High-Purity Tank-MountPressure-Regulating Valves for Inert Gas

Tank-Mount High-Pressure-RegulatingValves for Air and Inert Gas

High-Purity Tank-MountPressure-Regulating Valves for Fuel Gases