About Flow-Adjustment Valves
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About Pressure-Relief Valves
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About Gradual On/Off Valves
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Threaded Gradual On/Off Valves for Boiler Blow-Off
Prevent boiler scale deposits and sediment buildup with these valves that meet ASME standards for boiler drainage applications. They gradually open and close to prevent system damage from suddenly starting or stopping flow.
Wheel handles open and close with multiple turns, providing more controlled, shock-resistant flow than lever handles. They have a nonrising stem that stays in the same position whether the valve is open or closed.
Lever handles open and close faster than wheel handles.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
- Valve Type: Gate
- For Use With: Water
- Packing Material: EPDM Rubber
- Specifications Met: ASME B16.34, ASME B16.5, ASME B31.1, ASME BPVC.I
- Valve Type: Gate
- For Use With: Water
- Packing Material: EPDM Rubber
- Specifications Met: ASME B16.34, ASME B16.5, ASME B31.1, ASME BPVC.I
O'all | ||||||||
|---|---|---|---|---|---|---|---|---|
Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
NPT Female | ||||||||
| 1 | 40 | 250 psi @ 350° F | 35° to 350° | 3 5/8" | 14 1/4" | 4 7/16" | 0000000 | 0000000 |
| 1 1/4 | 60 | 250 psi @ 350° F | 35° to 350° | 3 5/8" | 13 1/16" | 4 3/4" | 0000000 | 000000 |
| 1 1/2 | 108 | 250 psi @ 350° F | 35° to 350° | 4 1/2" | 20 3/8" | 5 13/16" | 0000000 | 00000000 |
| 2 | 132 | 250 psi @ 350° F | 35° to 350° | 4 5/8" | 21 5/16" | 6 1/16" | 0000000 | 00000000 |
Low-Pressure Threaded Flow-Adjustment Valves
- Valve Type: Globe
- For Use With: Water
- Specifications Met: See table
Use these valves for boiler maintenance and other low-pressure plumbing applications. They gradually open and close with multiple turns of the wheel handle to adjust and regulate flow. All have a rising stem that lifts as the valve opens and lowers as the valve closes to provide a visual indication of whether flow is on or off.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | End-to-End Lg. | Port-to-Port Lg. | Stem Type | Specifications Met | Each | |
Bronze Body—Straight | |||||||||
|---|---|---|---|---|---|---|---|---|---|
NPT Female × NPT Female | |||||||||
| 1/4 | Not Rated | 175 psi @ 90° F | -20° to 150° | 2" | __ | Rising | __ | 0000000 | 000000 |
| 3/8 | Not Rated | 175 psi @ 90° F | -20° to 150° | 2" | __ | Rising | __ | 0000000 | 00000 |
| 1/2 | Not Rated | 175 psi @ 90° F | -20° to 150° | 2 5/16" | __ | Rising | UL Listed | 0000000 | 00000 |
| 3/4 | Not Rated | 175 psi @ 90° F | -20° to 150° | 2 5/16" | __ | Rising | UL Listed | 0000000 | 00000 |
| 1 | Not Rated | 175 psi @ 90° F | -20° to 150° | 3 1/8" | __ | Rising | UL Listed | 0000000 | 000000 |
| 1 1/4 | 20 | 175 psi @ 90° F | -20° to 150° | 4 5/16" | __ | Rising | UL Listed | 000000 | 000000 |
| 1 1/2 | 28 | 175 psi @ 90° F | -20° to 150° | 4 11/16" | __ | Rising | UL Listed | 0000000 | 000000 |
| 2 | 48 | 175 psi @ 90° F | -20° to 150° | 5 5/8" | __ | Rising | UL Listed | 0000000 | 000000 |
Bronze Body—90° Elbow | |||||||||
NPT Female × NPT Female | |||||||||
| 1/2 | Not Rated | 175 psi @ 90° F | -20° to 150° | __ | 1 1/16" | Rising | UL Listed | 0000000 | 00000 |
| 3/4 | Not Rated | 175 psi @ 90° F | -20° to 150° | __ | 1 3/16" | Rising | UL Listed | 0000000 | 00000 |
| 1 | Not Rated | 175 psi @ 90° F | -20° to 150° | __ | 1 5/8" | Rising | UL Listed | 0000000 | 000000 |
ASME-Code Fast-Acting Pressure-Relief Valves for Steam
- For Use With: Steam
- Temperature Range: -60° to 400° F
These valves meet ASME Code Section I for use with steam power boilers requiring pressure relief above 15 psi. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. For remote discharge, attach a drain line to the threaded relief port. Valves have a durable bronze body for a long service life.
EPR rubber seals provide better leak protection than brass seals.
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.
Inlet | Relief Port | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Location | Maximum Pressure, psi | Pipe Size | Location | Overall Ht. | Test Mechanism | Test Lever Type | Valve Type | Specifications Met | Choose a Set Pressure, psi | Each | |
NPT Male Inlet and NPT Female Relief Port | ||||||||||||
Bronze Body—Brass Seal | ||||||||||||
| 1/2 | Bottom | 250 | 3/4 | Side | 6 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 0000000 | |
| 1/2 | Bottom | 250 | 3/4 | Side | 7 5/16" | Lever | Swivel | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 3/4 | Bottom | 250 | 1 | Side | 7 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 3/4 | Bottom | 250 | 3/4 | Side | 7 5/16" | Lever | Swivel | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 | Bottom | 250 | 1 | Side | 7 5/8" | Lever | Swivel | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 | Bottom | 250 | 1 1/4 | Side | 8 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 1/4 | Bottom | 250 | 1 1/2 | Side | 9 5/8" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 1/2 | Bottom | 250 | 1 1/2 | Side | 9 5/8" | Lever | Swivel | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 1/2 | Bottom | 250 | 2 | Side | 10 5/8" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 2 | Bottom | 250 | 2 1/2 | Side | 13 5/8" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
Bronze Body—EPR Seal | ||||||||||||
| 1/2 | Bottom | 250 | 3/4 | Side | 6 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 3/4 | Bottom | 250 | 1 | Side | 7 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
| 1 | Bottom | 250 | 1 1/4 | Side | 8 1/2" | Lever | __ | Pop Safety | ASME BPVC.I | 0000000 | 000000 | |
ASME-Code Fast-Acting Pressure-Relief Valves for Low-Pressure Steam
- For Use With: Steam
- Specifications Met: ASME BPVC.IV
- Max. Temperature: 250° F
For use with low-pressure steam-heating boilers requiring pressure relief at 15 psi, these valves meet ASME Code Section IV. All spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. Body is bronze for durability and a long service life.
Vented relief ports exhaust discharge directly.
Threaded relief ports can be attached to a drain line for remote discharge.
For technical drawings and 3-D models, click on a part number.
Inlet | Relief Port | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Connection | Location | Maximum Pressure, psi | Connection Type | Location | Steam Flow Capacity, lbs./hr. | Set Pressure, psi | Overall Ht. | Test Mechanism | Valve Type | Each | |
Bronze Body—EPDM Seal | ||||||||||||
| 3/4 | NPT Male | Bottom | 15 | Vent | Top | 410 | 15 | 2 7/8" | Lever | Pop Safety | 0000000 | 000000 |
Inlet | Relief Port | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Connection | Location | Maximum Pressure, psi | Pipe Size | Connection | Location | Steam Flow Capacity, lbs./hr. | Set Pressure, psi | Overall Ht. | Test Mechanism | Valve Type | Each | |
Bronze Body—PTFE-Coated EPDM Seal | |||||||||||||
| 3/4 | NPT Male | Bottom | 15 | 3/4 | NPT Female | Side | 470 | 15 | 3 13/16" | Lever | Pop Safety | 0000000 | 000000 |
| 1 | NPT Male | Bottom | 15 | 1 | NPT Female | Side | 640 | 15 | 4" | Lever | Pop Safety | 0000000 | 00000 |
| 1 1/4 | NPT Male | Bottom | 15 | 1 1/2 | NPT Female | Side | 1,200 | 15 | 4 1/2" | Lever | Pop Safety | 0000000 | 000000 |
| 1 1/2 | NPT Male | Bottom | 15 | 2 | NPT Female | Side | 1,900 | 15 | 5 1/4" | Lever | Pop Safety | 0000000 | 000000 |
| 2 | NPT Male | Bottom | 15 | 2 | NPT Female | Side | 2,500 | 15 | 6 9/16" | Lever | Pop Safety | 000000 | 000000 |
| 2 1/2 | NPT Male | Bottom | 15 | 2 1/2 | NPT Female | Side | 3,520 | 15 | 8 1/8" | Lever | Pop Safety | 000000 | 000000 |
| 3 | NPT Male | Bottom | 15 | 3 | NPT Female | Side | 4,100 | 15 | 9 1/16" | Lever | Pop Safety | 000000 | 000000 |
Fast-Acting Pressure-Relief Valves for Ultra-Low-Pressure Steam
- For Use With: Steam
- Max. Temperature: 250° F
Choose these valves for small steam-heating boilers requiring pressure relief between 5 psi and 12 psi. They spring fully open at the set pressure and remain open until the system pressure is restored below the set pressure. All have a bronze body for durability and a long service life.
Vented relief ports exhaust discharge directly.
Threaded relief ports can be attached to a drain line for remote discharge.
For technical drawings and 3-D models, click on a part number.
