For Use With For Use With |
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Set Pressure Configuration Set Pressure Configuration |
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Overall Height Overall Height |
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Maximum Inlet Pressure Maximum Inlet Pressure |
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Set Pressure Set Pressure |
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Airflow Capacity Airflow Capacity |
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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 | ||||||||||
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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 | 0000000 | 000000 | |
1/4 | Bottom | Side | -15° to 250° | 2" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
3/8 | Bottom | Side | -15° to 250° | 2" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
Brass Body—Brass Seal | ||||||||||
1/8 | Bottom | Side | -40° to 400° | 2 1/8" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 0000 | |
1/4 | Bottom | Side | -40° to 400° | 3 1/8" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
1/4 | Bottom | Side | -40° to 400° | 3 3/16" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
1/4 | Bottom | Side | -20° to 300° | 3 3/16" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 000000 | |
1/4 | Bottom | Top | -40° to 400° | 3 1/8" | Lever | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
3/8 | Bottom | Side | -40° to 400° | 3 1/8" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
3/8 | Bottom | Side | -40° to 400° | 3 9/16" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
3/8 | Bottom | Top | -40° to 400° | 3 1/8" | Lever | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
1/2 | Bottom | Side | -40° to 400° | 3 3/4" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
1/2 | Bottom | Side | -40° to 400° | 3 13/16" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
1/2 | Bottom | Top | -40° to 400° | 3 1/8" | Lever | Pop Safety | ASME BPVC.VIII | 0000000 | 00000 | |
3/4 | Bottom | Side | -40° to 400° | 5 7/16" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 000000 | |
1 | Bottom | Side | -40° to 400° | 5 3/4" | Ring | Pop Safety | ASME BPVC.VIII | 0000000 | 000000 | |
Brass Body—Silicone Seal | ||||||||||
1/8 | Bottom | Side | -15° to 250° | 2" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 0000 | |
1/4 | Bottom | Side | -15° to 250° | 2" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 0000 | |
3/8 | Bottom | Side | -15° to 250° | 2" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 0000 | |
1/2 | Bottom | Side | -15° to 250° | 3 3/8" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 00000 | |
1/2 | Bottom | Side | -15° to 250° | 3 13/16" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 00000 | |
3/4 | Bottom | Side | -15° to 250° | 3 13/16" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 00000 | |
1 | Bottom | Side | -15° to 250° | 4 7/8" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 00000 | |
1 1/4 | Bottom | Side | -15° to 250° | 4 7/8" | Ring | Pop Safety | ASME BPVC.VIII | 00000000 | 00000 |
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 | |||||||||
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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 | 000000 | 00000 | |
1/4 | Bottom | 200 | Top | 3 1/8" | Lever | Pop Safety | 0000000 | 00000 | |
1/4 | Bottom | 300 | Side | 2 1/2" | __ | Pop Safety | 000000 | 00000 | |
1/4 | Bottom | 300 | Side | 3 1/8" | Ring | Pop Safety | 0000000 | 00000 | |
3/8 | Bottom | 200 | Top | 3 1/8" | Lever | Pop Safety | 0000000 | 00000 | |
3/8 | Bottom | 300 | Side | 2 1/2" | __ | Pop Safety | 000000 | 00000 | |
3/8 | Bottom | 300 | Side | 3 1/8" | Ring | Pop Safety | 0000000 | 00000 | |
1/2 | Bottom | 200 | Top | 3 1/8" | Lever | Pop Safety | 0000000 | 00000 | |
1/2 | Bottom | 300 | Side | 3 1/8" | __ | Pop Safety | 000000 | 00000 | |
1/2 | Bottom | 300 | Side | 3 3/4" | Ring | Pop Safety | 0000000 | 00000 | |
3/4 | Bottom | 300 | Side | 5 7/16" | Ring | Pop Safety | 0000000 | 000000 | |
1 | Bottom | 300 | Side | 5 3/4" | Ring | Pop Safety | 0000000 | 000000 |
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 | |||||||||
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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 |
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 | |||||||||||
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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 | 0000000 | 000000 | |
Switch Port | 1/2 | Bottom | 1/4 | Side | 2 1/2" | 1/4 | NPT Male | 1/4 | NPT Female | Ring | Pop Safety | 0000000 | 00000 |
Cleaned and bagged for oxygen service and other high-purity applications, these valves can withstand the extreme cold of liquid argon, liquid nitrogen, and liquid oxygen. 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.
For technical drawings and 3-D models, click on a part number.
These valves meet ASME Code Section VIII for use with cryogenic pressure vessels. Rated for use with liquid argon, liquid carbon dioxide, liquid helium, liquid methane, liquid nitrogen, and liquid oxygen, they are cleaned and bagged for oxygen service and other high-purity applications. All spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Attach a drain line to the threaded relief port for remote discharge.
For technical drawings and 3-D models, click on a part number.