Pop-Safety Valves | McMaster-Carr

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	Valve Type Valve Type	Show

Pop Safety

	Valve Type Valve Type	Hide

	Inlet Pipe Size Inlet Pipe Size

	For Use With For Use With

	Valve Function Valve Function

Pressure Relief

	Inlet Thread Type Inlet Thread Type

NPT

	Maximum Inlet Pressure Maximum Inlet Pressure

	Relief Port Pipe Size Relief Port Pipe Size

	Body Material Body Material

	Seal Material Seal Material

	Inlet Gender Inlet Gender

Female

Male

	Set Pressure Configuration Set Pressure Configuration

Nonadjustable

Adjustable

	Specifications Met Specifications Met

ASME Code

CSA

	Test Mechanism Test Mechanism

Lever

Ring

T-Handle

	Shape Shape


Straight	90° Elbow

	Maximum Temperature Maximum Temperature

100° to 249.9° F

250° to 499.9° F

	Overall Height Overall Height

	Relief Port Connection Type Relief Port Connection Type

Pipe

Vent

	Activation Activation

Pressure Driven

	Inlet Connection Type Inlet Connection Type

	Pipe

	Inlet Connection Style Inlet Connection Style

Threaded

	Relief Port Location Relief Port Location

Side

Top

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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130 Products

About Pressure-Relief Valves

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 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.

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.

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.

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.

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.

Fast-Acting Pressure-Relief
Valves for Air with Gauge Port

Attach a pressure gauge to the 1/4 NPT female port on these valves.

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

These valves meet ASME Code Section I for use with steam power boilers requiring pressure relief above 15 psi.

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

For use with low-pressure steam-heating boilers requiring pressure relief at 15 psi, these valves meet ASME Code Section IV.

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

Choose these valves for small steam-heating boilers requiring pressure relief between 5 psi and 12 psi.

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

Protect your water-heating system with these valves that meet ASME Code Section IV for hot water heaters and boilers.

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

These valves meet ASME Code Section VIII for use with water pressure vessels.

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

Also known as T & P valves, these open when water temperature reaches 210° F or at the set pressure.

Fast-Acting Pressure-Relief
Valves for Cryogenic Liquids

Use these valves with liquid argon, liquid nitrogen, and liquid oxygen.

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. They are for use with argon, carbon dioxide, helium, hydrogen, methane, nitrogen, and oxygen.

About Pressure-Relief Valves

Fast-Acting Pressure-Relief Valves

ASME-Code Fast-Acting Pressure-ReliefValves for Air and Inert Gas

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

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

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

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

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

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

Adjustable Fast-Acting Pressure-ReliefValves for Air and Inert Gas

Fast-Acting Pressure-ReliefValves for Air with Gauge Port

ASME-Code Fast-ActingPressure-Relief Valves for Steam

ASME-Code Fast-Acting Pressure-ReliefValves for Low-Pressure Steam

Fast-Acting Pressure-Relief Valvesfor Ultra-Low-Pressure Steam

ASME-Code Fast-ActingPressure-Relief Valves for Hot Water

ASME-Code Fast-ActingPressure-Relief Valves for Water

Fast-Acting Temperature- andPressure-Relief Valves for Hot Water

Fast-Acting Pressure-ReliefValves for Cryogenic Liquids

ASME-Code Fast-Acting Pressure-ReliefValves for Cryogenic Fluids