Tank Valves | McMaster-Carr

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System of Measurement

Inlet Pipe Size

For Use With

Citric Acid (25% Concentration)

Citric Acid (50% Concentration)

Citric Acid (100% Concentration)

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UN/UNF (SAE Straight)

UNJ/UNJF (SAE Straight)

Valve Type

Shape

Actuation

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Inlet Thread Type

Inlet Gender

Maximum Pressure

1,000 psi to 2,999 psi

Valve Function

Inlet Connection

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Maximum Inlet Pressure

Minimum Temperature

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

Connects To

Set Pressure

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi or greater

Inlet Connection Port

Seal Material

Thread Size

402 Products

About Pressure-Relief Valves

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.

Couplers for High-Pressure Fill Valves

High-Pressure Fill Valves for Air and Hydraulic Fluid

Add air and hydraulic fluid to high-pressure struts, tanks, and hydraulic accumulators—these fill valves withstand pressures up to 5,000 psi.

Level Control

Brass Float Valves

Use these float valves with water.

Bronze Float Valves

With a durable bronze body, these float valves can be used with water and hydraulic fluid.

Compact Metal Float Valves

Smaller than other float valves, these are sized for containers with limited space.

PVC Float Valves

These float valves have a temperature range of 35° to 110° F.

Polypropylene Float Valves

Able to withstand higher temperatures than PVC float valves, these valves have a temperature range of 35° to 175° F.

Extra-Compact Plastic Float Valves

Control water levels in spaces where a rod and lever won’t fit; these float valves have an internal float and connect to your pipe.

Compact Plastic Float Valves

Smaller than other float valves, these are sized for containers with limited space.

Easy-Adjust Bronze Float Valves

Easy-Adjust Cast Iron Float Valves

Float Valves for Chemicals

Made of stainless steel, these float valves have excellent corrosion resistance even when exposed to chemicals.

Float Valves for Draining Condensate

Automatically remove condensate from compressed air or inert gas lines—these float valves have a float-operated drain control.

Compact Float Valves with Plastic
Reservoir for Food and Beverage

Commonly used in ice-making machines, these valves have floats that rest inside a clear plastic reservoir.

Float Valves for Food and Beverage

Compact Float Valves for Food and Beverage

Smaller than other float valves, these are sized for containers with limited space.

Drainage Valves

Also known as stop cocks, install these valves on your tank for easy draining.

Easy-Grip Drainage Valves

The large knob makes these drainage valves easy to grip.

Float Valve Bodies for Water

Combine these float valve bodies with floats and rods (not included) to create float valves that meet exact specifications.

Float Valve Bodies for Chemicals

Often found in tanks that are frequently washed down, these float valve bodies are 316 stainless steel, so they resist corroding from harsh cleaners.

Float Valve Bodies for Drinking Water

Safe for use in drinking water systems, these float valve bodies meet NSF/ANSI 61 standards.

Flow-Adjustment Valve Bodies

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

Connectors for Lift Truck Propane Tanks

Use a valve, valve connector, and hose connector to create a complete connection between a propane tank and a lift truck's fuel hose.

Fast-Acting Pressure-Relief Valves for Air and Inert Gas

Corrosion-Resistant ASME-Code Fast-Acting
Pressure-Relief Valves for Air and Inert Gas

For corrosion resistance in wet conditions and harsh environments, these valves have a 303 stainless steel body. All meet ASME Code Section VIII for use with air and inert gas pressure vessels.

ASME-Code Fast-Acting Pressure-Relief
Valves for Air and Inert Gas

Body is brass or nickel-plated brass. All meet ASME Code Section VIII for use with air and inert gas pressure vessels.

Fast-Acting Pressure-Relief
Valves for Air and Inert Gas

The most basic option for air and inert gas applications.

Corrosion-Resistant
Remote-Discharge ASME-Code Fast-Acting
Pressure-Relief Valves for Air and Inert Gas

With a 316 stainless steel body for exceptional corrosion resistance, these valves are often used in wet conditions and harsh environments. All meet ASME Code Section VIII for use with air and inert gas pressure vessels.

Large-Diameter Remote-Discharge
ASME-Code Fast-Acting
Pressure-Relief Valves for Air and Inert Gas

Commonly used with high-volume blowers, compressors, and air-powered conveyors, these valves quickly relieve a large amount of air in systems with a pipe size of 2 or greater. All meet ASME Code Section VIII for use with air and inert gas pressure vessels.

Large-Diameter Remote-Discharge Fast-Acting
Pressure-Relief Valves for Air and Inert Gas

Commonly used with high-volume blowers, compressors, and air-powered conveyors, these valves quickly relieve a large amount of air in systems with a pipe size of 2 or greater.

Remote-Discharge ASME-Code Fast-Acting
Pressure-Relief Valves for Air and Inert Gas

These valves have a bronze body for durability and a long service life. All meet ASME Code Section VIII for use with air and inert gas pressure vessels.

Adjustable Fast-Acting Pressure-Relief
Valves for Air and Inert Gas

Change set pressure to suit your application—this valve includes four interchangeable color-coded springs with different set pressure ranges.

Compact Pressure-Relief Valves

Less than a quarter of the height of standard pressure-relief valves, these are often installed on tanks in low-clearance areas.

Pressure-Relief Discs

Flange-Mount Pressure-Relief Discs

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

Heat-Activated Threaded Pressure-Relief Discs

Also known as fusible plugs, these discs have a metal core that melts at a set temperature to exhaust discharge directly.

Threaded Pressure-Relief Discs

These valves have a vented relief port to exhaust discharge directly.

Remote-Discharge Threaded Pressure-Relief Discs

Instead of exhausting discharge directly, these discs have a threaded relief port for attaching a drain line to direct discharge away from your work environment.

Valves for Propane Tanks

Valves work with standard propane tanks similar to tanks on a gas grill.

Air Compressor Air Flow Check Valves

Prevent air from escaping an air storage tank when the air compressor is not running. These valves open to allow flow into the tank and close when flow stops or reverses direction.

Compressed Air Drain Valves

Timer-Operated Compressed Air Drain Valves

Set the electronic timer on these drain valves to open automatically at your specified time interval.

High-Pressure Timer-Operated
Compressed Air Drain Valves

These withstand at least double the pressure of our other timer-operated drain valves.

Timer-Operated Compressed Air
Drain Valves with Digital Display

Use the digital display to set these valves to open automatically at precise intervals.

Easy-to-Clean Float-Operated
Compressed Air Drain Valves

An external drain provides quick, easy access for cleaning.

High-Discharge Float-Operated
Compressed Air Drain Valves

With a discharge capacity of more than four gallons per minute, these drain valves can handle large compressed air systems.

Compact Float-Operated
Compressed Air Drain Valves

Sized right for tight spots.

High-Pressure Float-Operated
Compressed Air Drain Valves

Able to withstand up to 400 psi, these have the highest pressure rating of all our float-operated drain valves.

Back-Pressure-Operated
Compressed Air Drain Valves

When your compressor turns off, it creates back pressure that opens these valves automatically, allowing liquid to escape.

Easy-to-Monitor Float-Operated
Compressed Air Drain Valves

Keep an eye on condensate collecting in your compressed air line. These drain valves have a clear bowl, so you can see inside to inspect the contents.

No-Air-Loss Compressed Air Drain Valves

Save energy by minimizing the loss of compressed air. Unlike other drain valves, these only open when they’re full. They close before the reservoir is completely empty, so no air escapes from the system.

About Pressure-Relief Valves

Fill Valves and Fittings

Air Fill Valves

Compressed Gas Fill Valves

Couplers for High-Pressure Fill Valves

High-Pressure Fill Valves for Air and Hydraulic Fluid

Level Control

Brass Float Valves

Bronze Float Valves

Compact Metal Float Valves

PVC Float Valves

Polypropylene Float Valves

Extra-Compact Plastic Float Valves

Compact Plastic Float Valves

Easy-Adjust Bronze Float Valves

Easy-Adjust Cast Iron Float Valves

Float Valves for Chemicals

Float Valves for Draining Condensate

Compact Float Valves with PlasticReservoir for Food and Beverage

Float Valves for Food and Beverage

Compact Float Valves for Food and Beverage

Drainage Valves

Easy-Grip Drainage Valves

Float Valve Bodies for Water

Float Valve Bodies for Chemicals