Brass Air Tank Valves | McMaster-Carr

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	Body Material Body Material

Brass

Bronze

	Seal Material Seal Material

Rubber

Brass

	For Use With For Use With

	Inlet Pipe Size Inlet Pipe Size

	Valve Function Valve Function

Pressure Relief

Fill

Backflow Prevention

	Inlet Thread Type Inlet Thread Type

NPT

UNF

	Maximum Inlet Pressure Maximum Inlet Pressure

	Set Pressure Configuration Set Pressure Configuration

Nonadjustable

Adjustable

	Shape Shape

	Straight
	90° Elbow
	70° Elbow

	Relief Port Connection Type Relief Port Connection Type

Pipe

Vent

	Relief Port Pipe Size Relief Port Pipe Size

	Valve Type Valve Type

Pop Safety

Schrader

Check

	Inlet Connection Type Inlet Connection Type


Pipe	Tube

	Test Mechanism Test Mechanism

Ring

Lever

	Inlet Gender Inlet Gender

Male

Female

	System of Measurement System of Measurement

Inch

Metric

	Overall Height Overall Height

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Inlet Connection Style Inlet Connection Style

Threaded

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

RoHS Compliant with
Exemptions

RoHS Compliant

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

REACH Compliant

	Material Material

101 Products

About Pressure-Relief Valves

With Air-Fill Valve

With Switch Port

For Use With: Air
Temperature Range: -15° to 250° F

Attach a pressure gauge to the 1/4 NPT female port on these valves. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. All have a vented relief port to exhaust discharge directly.

Valves with an air-fill (Schrader) valve let you quickly fill and empty compressed air tanks.

Valves with a switch port allow you to install a pressure switch for activating alarms and other equipment when pressure exceeds the set point.

For technical drawings and 3-D models, click on a part number.

	Inlet		Relief Port			Switch Port		Gauge Port
Features	Pipe Size	Location	Pipe Size	Location	Overall Ht.	Pipe Size	Connection	Pipe Size	Connection	Test Mechanism	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and NPT Female Relief Port
Brass Body—Silicone Seal
Air-Fill (Schrader) Valve	1/2	Bottom	1/4	Side	1 7/8"	__	__	1/4	NPT Female	Ring	Pop Safety	125, 135, 150	0000000	000000
Switch Port	1/2	Bottom	1/4	Side	2 1/2"	1/4	NPT Male	1/4	NPT Female	Ring	Pop Safety	100, 125, 135, 150	0000000	00000

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

Valve
With
Test Ring

Valve With Test Lever

For Use With: Air, Inert Gas
Temperature Range: See table

To protect against damage in air lines, air receivers, compressor tanks, and other air-powered equipment, these valves spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. All meet ASME Code Section VIII for use with air and inert gas pressure vessels. They have a vented relief port to exhaust discharge directly.

Valves with a nickel-plated brass body are more corrosion resistant than valves with a plain brass body.

Silicone seals provide better leak protection than brass seals.

For technical drawings and 3-D models, click on a part number.

Inlet
Pipe Size	Location	Relief Port Location	Temperature Range, ° F	Overall Ht.	Test Mechanism	Valve Type	Specifications Met	Choose a Set Pressure, psi		Each
NPT Male Inlet and Relief Vent
Nickel-Plated Brass Body—Silicone Seal
1/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	50, 75, 100, 125, 150, 175, 200, 225, 250	0000000	000000
1/4	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	50, 75, 100, 125, 150, 175, 200, 225, 250	0000000	00000
3/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	50, 75, 100, 125, 150, 175, 200, 225, 250	0000000	00000
Brass Body—Brass Seal
1/8	Bottom	Side	-40° to 400°	2 1/8"	Ring	Pop Safety	ASME BPVC.VIII	50, 60, 70, 75, 80, 90, 100, 110, 115, 120, 125, 130, 140, 150, 175, 200, 225, 250	0000000	00000
1/4	Bottom	Side	-40° to 400°	3 1/8"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
1/4	Bottom	Side	-40° to 400°	3 3/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
1/4	Bottom	Side	-20° to 300°	3 3/16"	Ring	Pop Safety	ASME BPVC.VIII	60, 100, 250, 300, 400, 500, 750, 1,000, 1,500, 2,000, 2,500, 3,000, 3,500, 4,000	0000000	000000
1/4	Bottom	Top	-40° to 400°	3 1/8"	Lever	Pop Safety	ASME BPVC.VIII	15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100, 110, 125, 130, 140, 150, 175, 200	0000000	00000
3/8	Bottom	Side	-40° to 400°	3 1/8"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
3/8	Bottom	Side	-40° to 400°	3 9/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
3/8	Bottom	Top	-40° to 400°	3 1/8"	Lever	Pop Safety	ASME BPVC.VIII	15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100, 110, 125, 130, 140, 150, 175, 200	0000000	00000
1/2	Bottom	Side	-40° to 400°	3 3/4"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
1/2	Bottom	Side	-40° to 400°	3 13/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	00000
1/2	Bottom	Top	-40° to 400°	3 1/8"	Lever	Pop Safety	ASME BPVC.VIII	15, 20, 25, 30, 40, 50, 60, 70, 80, 90, 100, 110, 125, 130, 140, 150, 175, 200	0000000	00000
3/4	Bottom	Side	-40° to 400°	5 7/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	000000
1	Bottom	Side	-40° to 400°	5 3/4"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	000000
Brass Body—Silicone Seal
1/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, 100, 110, 120, 125, 130, 140, 150, 175, 200, 225, 250, 275, 300	00000000	0000
1/4	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	00000000	0000
3/8	Bottom	Side	-15° to 250°	2"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 60, 65, 70, 75, 80, 90, 100, 105, 110, 120, 125, 130, 140, 150, 175, 200, 225, 250, 275, 300	00000000	0000
1/2	Bottom	Side	-15° to 250°	3 3/8"	Ring	Pop Safety	ASME BPVC.VIII	50, 55, 60, 65, 70, 75, 80, 85, 90, 100, 110, 115, 120, 125, 135, 140, 145, 150, 175, 200, 225, 250	00000000	00000
1/2	Bottom	Side	-15° to 250°	3 13/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 45, 50, 75, 80, 90, 100, 120, 125, 130, 135, 145, 150, 175, 200, 225, 250, 275, 300	00000000	00000
3/4	Bottom	Side	-15° to 250°	3 13/16"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 50, 60, 65, 70, 75, 80, 90, 100, 110, 120, 125, 130, 135, 140, 150, 175, 200, 225, 250, 275, 300	00000000	00000
1	Bottom	Side	-15° to 250°	4 7/8"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 35, 40, 50, 60, 70, 75, 80, 90, 100, 110, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	00000000	00000
1 1/4	Bottom	Side	-15° to 250°	4 7/8"	Ring	Pop Safety	ASME BPVC.VIII	25, 30, 40, 50, 60, 70, 75, 80, 90, 100, 110, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	00000000	00000

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

Valve

Valve With Test Lever

Valve
With
Test Ring

For Use With: Air, Inert Gas
Temperature Range: -30° to 400° F

These valves spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. They have a vented relief port to exhaust discharge directly.

For technical drawings and 3-D models, click on a part number.

Inlet
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Overall Ht.	Test Mechanism	Valve Type	Choose a Set Pressure, psi		Each
NPT Male Inlet and Relief Vent
Brass Body and Seal
1/8	Bottom	100	Side	1 3/4"	__	Pop Safety	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	000000	000000
1/4	Bottom	200	Top	3 1/8"	Lever	Pop Safety	5, 10	0000000	00000
1/4	Bottom	300	Side	2 1/2"	__	Pop Safety	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	000000	00000
1/4	Bottom	300	Side	3 1/8"	Ring	Pop Safety	10, 15, 20	0000000	00000
3/8	Bottom	200	Top	3 1/8"	Lever	Pop Safety	5, 10	0000000	00000
3/8	Bottom	300	Side	2 1/2"	__	Pop Safety	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	000000	00000
3/8	Bottom	300	Side	3 1/8"	Ring	Pop Safety	10, 15, 20	0000000	00000
1/2	Bottom	200	Top	3 1/8"	Lever	Pop Safety	5, 10	0000000	00000
1/2	Bottom	300	Side	2 5/8"	__	Pop Safety	5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	000000	00000
1/2	Bottom	300	Side	3 3/4"	Ring	Pop Safety	10, 15, 20	0000000	00000
3/4	Bottom	300	Side	5 7/16"	Ring	Pop Safety	10, 15, 20	0000000	000000
1	Bottom	300	Side	5 3/4"	Ring	Pop Safety	10, 15, 20	0000000	000000

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

Valve

Valve With Test Lever

Valve With Swivel Test Lever

For Use With: Air, Inert Gas
Specifications Met: ASME BPVC.VIII
Temperature Range: See table

Unlike valves that release discharge directly, these have a threaded relief port to direct discharge away from your work environment. They spring fully open at the set pressure and remain fully open until the system pressure is restored below the set pressure. All meet ASME Code Section VIII for use with air and inert gas pressure vessels. Body is bronze for durability and a long service life.

Swivel test levers rotate 360° around the valve for use in areas with limited clearance.

For technical drawings and 3-D models, click on a part number.

1/2 NPT Male Bottom Inlet × 3/4 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Test Lever Type	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	__	6 1/2"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	__	6"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	__	6 7/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	Swivel	7 5/16"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

3/4 NPT Male Bottom Inlet × 3/4 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Test Lever Type	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-15° to 406°	Lever	Swivel	7 5/16"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	0000000

3/4 NPT Male Bottom Inlet × 1 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	7 1/2"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	6 1/4"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	7 1/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

1 NPT Male Bottom Inlet × 1 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Test Lever Type	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-15° to 406°	Lever	Swivel	7 5/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	0000000

1 NPT Male Bottom Inlet × 1 1/4 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	8 1/2"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	7 3/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	7 7/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

1 1/4 NPT Male Bottom Inlet × 1 1/4 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Test Lever Type	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-15° to 406°	Lever	Swivel	8 3/4"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	0000000

1 1/4 NPT Male Bottom Inlet × 1 1/2 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	9 5/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	8 5/16"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	8 3/4"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

1 1/2 NPT Male Bottom Inlet × 2 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range, °F	Test Mechanism	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	10 5/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	9 7/16"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	9 3/4"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

2 NPT Male Bottom Inlet × 2 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range °F	Test Mechanism	Test Lever Type	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-15° to 406°	Lever	Swivel	11"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	0000000

2 NPT Male Bottom Inlet × 2 1/2 NPT Female Side Relief Port

Material
Seal	Body	Temperature Range °F	Test Mechanism	Overall Ht.	Valve Type	Choose a Set Pressure, psi		Each
Brass	Bronze	-60° to 406°	Lever	13 5/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250, 275, 300	0000000	0000000
Brass	Bronze	-15° to 406°	__	10 7/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000
Brass	Bronze	-15° to 406°	Lever	11 1/8"	Pop Safety	15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 175, 200, 225, 250	0000000	000000

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

For Use With: Air, Inert Gas
Temperature Range: -15° to 250° F

Change set pressure to suit your application—this valve includes four interchangeable color-coded springs with different set pressure ranges. Remove the adjustment screw to change springs; turn the screw to alter the set pressure within the range. The valve springs fully open at the set pressure and remains open until the system pressure is restored below the set pressure. It has a vented relief port to exhaust discharge directly.

For technical drawings and 3-D models, click on a part number.

Inlet				Set Pressure
Pipe Size	Location	Maximum Pressure, psi	Relief Port Location	Range, psi	Adjustment Method	Overall Ht.	Valve Type	Includes		Each
NPT Male Inlet and Relief Vent
Brass Body—Silicone Seal
1/4	Bottom	200	Side	25 to 200	External Adjustment Screw	1 5/8"	Pop Safety	Yellow Spring (25-50 psi), Red Spring (51-100 psi), Silver Spring (101-150 psi), Blue Spring (151-200 psi)	00000000	00000

Air Fill Valves

Also known as Schrader valves, these valves rapidly fill or empty compressed air tanks or pneumatic tires.

Brass valves are softer than other metals, so they’re easier to thread together. They have good corrosion resistance. Nickel-plated brass valves have better corrosion resistance than unplated brass valves.

For technical drawings and 3-D models, click on a part number.

NPT Male Threaded Pipe Inlet × Schrader Male Threaded Hose Outlet

	Outlet
Inlet Pipe Size	Thread Size	Connection Lg.	Max. Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size	Includes		Each
Brass Body
1/8	0.305"-32	3/8"	200	-40° to 225°	15/16"	7/16"	Thread Cap	0000000	00000
1/8	0.305"-32	11/16"	200	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	7/8"	200	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/4	0.305"-32	9/16"	200	-40° to 225°	1 5/16"	9/16"	Thread Cap	0000000	0000
1/4	0.305"-32	9/16"	4,000	-40° to 225°	1 5/16"	9/16"	Thread Cap	0000000	0000
Nickel-Plated Brass Body
1/8	0.305"-32	3/8"	200	-40° to 225°	15/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	3/8"	4,000	-40° to 225°	15/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	7/16"	200	-40° to 225°	7/8"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	7/16"	200	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	7/16"	4,000	-40° to 225°	7/8"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	7/16"	4,000	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	11/16"	200	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/8	0.305"-32	11/16"	4,000	-40° to 225°	1 5/16"	7/16"	Thread Cap	0000000	0000
1/4	0.305"-32	9/16"	200	-40° to 225°	1 5/16"	9/16"	Thread Cap	0000000	0000

NPT Male Threaded Pipe Inlet × UN/UNF Male Threaded Hose Outlet

NPT Male Threaded
Pipe × UNF Male
Threaded Hose

	Outlet
Inlet Pipe Size	Thread Size	Connection Lg.	Max. Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size	Includes		Each
Brass Body
1/8	7/16"-20	1/2"	200	-40° to 225°	1 1/16"	7/16"	Thread Cap	0000000	00000

Metric Male Threaded Pipe Inlet × Schrader Male Threaded Hose Outlet

Metric Male Threaded
Pipe × Schrader Male
Threaded Hose

Inlet		Outlet
Thread Size	Thread Pitch, mm	Thread Size	Connection Lg.	Max. Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size, mm	Includes		Each
Brass Body
M10	1	0.305"-32	7/16"	200	-40° to 225°	1"	14	O-Ring, Thread Cap	0000000	00000
M10	1	0.305"-32	7/16"	4,000	-40° to 225°	1"	14	O-Ring, Thread Cap	0000000	00000

Barbed Male Tube Inlet × Schrader Male Threaded Hose Outlet

Barbed Male Tube ×
Schrader Male
Threaded Hose

	Outlet
For Inlet Tube ID	Thread Size	Connection Lg.	Max. Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size	Includes		Each
Brass Body
1/4"	0.305"-32	3/4"	200	-40° to 225°	1 11/16"	1/2"	Thread Cap	0000000	00000

Couplers for High-Pressure Fill Valves

Fill tanks and recharge struts—these couplers join hose to high-pressure fill valves with Schrader threads.

Some couplers meet SAE AS4395, an automotive industry standard for flared fitting dimensions.

70° elbow couplers are angled to access hard-to-reach valves.

Couplers with a shut-off valve let you control the flow of air by hand. When used with Schrader valves that have a core, the core depressor pin in these couplers press valves open to let air flow in.

For technical drawings and 3-D models, click on a part number.

Schrader Female Threaded Hose × NPT Threaded Pipe

70° Elbow, Schrader
Female Threaded Hose ×
NPT Female Threaded Pipe

90° Elbow, Schrader Female
Threaded Hose × NPT
Threaded Male Pipe

Inlet
Thread Size	Pipe Size	Outlet Gender	Material	Max. Pressure, psi	Temp. Range, °F	Features		Each
70° Elbow
0.305"-32	1/8	Female	Brass	3,000	-20° to 250°	__	000000	000000
90° Elbow with a Shut-Off Valve
0.305"-32	1/8	Male	Brass	3,000	-40° to 160°	Core Depressor Pin	000000	00000

Schrader Female Threaded Hose × UN/UNF Male Flared Tube

Straight, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

70° Elbow, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

90° Elbow, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

Inlet		Outlet
Thread Size	Material	Thread Size	Material	Flared Angle	For Tube OD	Material	Max. Pressure, psi	Temp. Range, °F	Features	Specifications Met		Each
Straight
0.305"-32	Brass	7/16"-20	Zinc-Plated Steel	37°	1/4"	__	5,000	-20° to 250°	__	SAE AS4395	000000	000000
70° Elbow
0.305"-32	__	7/16"-20	__	37°	1/4"	Brass	5,000	Not Rated	__	__	000000	00000
90° Elbow with a Shut-Off Valve
0.305"-32	__	3/8"-24	__	37°	3/16"	Brass	3,000	-40° to 160°	Core Depressor Pin	SAE AS4395	000000	00000
0.485"-26	__	3/8"-24	__	37°	3/16"	Brass	3,000	-40° to 160°	Core Depressor Pin	__	000000	00000

Air Compressor Air Flow Check Valves

Prevent air from escaping an air storage tank when the air compressor is not running. These valves install on the inlet of a tank. They open to allow airflow into the tank and close when flow stops or reverses direction. They have a 1/8 NPT tapped unloader port with removable plug for connecting to a pressure switch.

NPT Female Inlet × NPT Male Outlet

Female Inlet × Male Outlet

Brass Body
Inlet Pipe Size	Outlet Pipe Size	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size		Each
3/8	1/2	20	450	3	-15° to 400°	2 11/16"	7/8"	0000000	000000
1/2	1/2	20	450	3	-15° to 400°	2 15/16"	1"	0000000	00000
3/4	3/4	30	450	3	-15° to 400°	2 3/4"	1 3/16"	0000000	00000
3/4	1	60	450	3	-15° to 400°	3 11/16"	1 5/16"	0000000	00000
1	1	60	450	3	-15° to 400°	4 1/8"	1 1/2"	0000000	00000
1 1/4	1 1/4	130	450	3	-15° to 400°	4 7/16"	1 7/8"	0000000	00000

Tube Compression Female Inlet × NPT Male Outlet

Female Inlet × Male Outlet

Brass Body
For Inlet Tube OD	Outlet Pipe Size	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size		Each
1/2"	1/2	20	450	3	-15° to 400°	2 7/8"	7/8"	0000000	000000
3/4"	3/4	30	450	3	-15° to 400°	3 9/16"	1 1/8"	0000000	00000

Pressure-Relieving Air Compressor Air Flow Check Valves

Release pressure in the line between a compressor and an air storage tank, making start-up easier on the motor. These valves install on the inlet of a tank to prevent air from escaping when the compressor is not running. They allow airflow in one direction and close when flow stops.

NPT Female Inlet × NPT Male Outlet

Threaded Female Inlet × Threaded Male Outlet

Brass Body
Inlet Pipe Size	Outlet Pipe Size	Min. Flow Rate, scfm	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size		Each
1/4	1/4	1	6	250	3	-20° to 400°	1 13/16"	3/4"	0000000	000000
3/8	3/8	3	12	250	3	-20° to 400°	1 13/16"	13/16"	0000000	00000
1/2	1/2	8	24	250	3	-20° to 400°	2 1/4"	1"	0000000	00000
3/4	3/4	15	48	250	3	-20° to 400°	2 3/8"	1 3/16"	0000000	00000

Female Tube Compression Inlet × NPT Male Outlet

Tube Compression Female Inlet × Threaded Male Outlet

Inlet
For Inlet Tube OD	Outlet Pipe Size	Min. Flow Rate, scfm	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, °F	Overall Lg.	Hex Size		Each
Brass Body
3/8"	1/4	1	6	250	3	-20° to 400°	1 5/8"	3/4"	0000000	000000
1/2"	3/8	3	12	250	3	-20° to 400°	1 11/16"	13/16"	0000000	00000

Air Flow Check Valves

Threaded Female Inlet × Threaded Female Outlet

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

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.

UNF Female Inlet × UNF Female Outlet

							Overall
Inlet Thread Size	Outlet Thread Size	Flow Coefficient (Cv)	Max. Flow Rate, scfm	Max. Pressure, psi	Min. Opening Pressure, psi	Temp. Range, °F	Lg.	Dia.		Each
Brass Body
10-32	10-32	0.09	9.5	125	0.1	-20° to 160°	13/16"	5/16"	0000000	000000