Safety Relief Valves | McMaster-Carr

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Inlet Pipe Size

For Use With

Liquid Nitrogen

Set Pressure

25 psi to 200 psi

Pipe Size

Maximum Inlet Pressure

Less than 250 psi

250 psi to 299 psi

300 psi to 499 psi

500 psi to 999 psi

1,000 psi or greater

Airflow Capacity

Body Material

Stainless Steel

Relief Port Pipe Size

Set Pressure Configuration

Seal Material

Stainless Steel

Burst Pressure

Shape

Inlet Gender

Test Mechanism

Maximum Pressure

Less than 250 psi

250 psi to 299 psi

300 psi to 499 psi

500 psi to 999 psi

1,000 psi or greater

Maximum Temperature

Less than 250° F

250° F to 399° F

400° F to 409° F

410° F or greater

Valve Function

Pressure Relief

Actuation

Valve Type

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Thread Type

Material

Resin-Filled Graphite

Stainless Steel

Relief Port

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262 Products

Pressure-Relief Valves

Fast-Acting Pressure-Relief Valves

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

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

Meet ASME Code Section VIII for use with air and inert gas pressure vessels

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

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

Direct discharge away from your work environment through the relief port

ASME-Code Fast-Acting Pressure-Relief Valves for Steam

ASME-Code Fast-Acting Pressure-Relief Valves for Steam

Install in steam power boilers requiring pressure relief above 15 psi

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

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

The most basic option for air and inert gas applications

ASME-Code Fast-Acting Pressure-Relief Valves for Hot Water

ASME-Code Fast-Acting Pressure-Relief Valves for Hot Water

Meet ASME Code Section IV for hot water heaters and boilers

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

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

Stainless steel body to resist corrosion in wet conditions and harsh environments

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

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

Change set pressure using four interchangeable springs with different set pressure ranges

ASME-Code Fast-Acting Pressure-Relief Valves for Water

ASME-Code Fast-Acting Pressure-Relief Valves for Water

Meet ASME Code Section VIII for use with water pressure vessels

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

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

Resist corrosion and direct discharge away from your work environment

ASME-Code Fast-Acting Pressure-Relief Valves for Cryogenic Fluids

ASME-Code Fast-Acting Pressure-Relief Valves for Cryogenic Fluids

Our only valves that meet ASME Code Section VIII for use with cryogenic pressure vessels

Fast-Acting Pressure-Relief Valves for Cryogenic Liquids

Fast-Acting Pressure-Relief Valves for Cryogenic Liquids

Withstand the extreme cold of liquid argon, nitrogen, and oxygen

ASME-Code Fast-Acting Pressure-Relief Valves for Low-Pressure Steam

ASME-Code Fast-Acting Pressure-Relief Valves for Low-Pressure Steam

Place in low-pressure steam-heating boilers requiring pressure relief at 15 psi

Fast-Acting Temperature- and Pressure-Relief Valves for Hot Water

Fast-Acting Temperature- and Pressure-Relief Valves for Hot Water

Open when water temperature reaches 210°F or the set pressure

Fast-Acting Pressure-Relief Valves for Ultra-Low-Pressure Steam

Fast-Acting Pressure-Relief Valves for Ultra-Low-Pressure Steam

Install in steam-heating boilers requiring pressure relief between 5 and 12 psi

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

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

Relieve a large amount of air and meet ASME Code Section VIII

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

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

Relieve a large amount of air in systems with a pipe size of 2 or greater

Other Products

On-Off Valves

Start and stop flow through a line

Pressure-Relief Discs

Pressure-Relief Discs

Rupture at a set pressure or temperature to vent fluid and gas and protect machinery; one-time use

Safety Lockout Valves

Safety Lockout Valves

Prevent accidental start-up when servicing equipment

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)