About Gradual On/Off Valves
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FM-Approved Threaded Gradual On/Off Valves
- Valve Type: Gate
- For Use With: Water
- Packing Material: Graphite
- Specifications Met: FM Approved, UL-Listed, C-UL Certified
FM-approved for fire suppression and protection, these valves can isolate sections of the water supply in your facility. Also known as gate valves, they open and close gradually with multiple turns of the wheel handle to prevent sudden starts and stops of flow. The stem raises the handle up as these valves open and lowers it as they close. At a glance, you can see if flow is on or off. The stem is isolated from what’s flowing through your line, giving these valves a longer lifespan than valves with a nonrising stem. Made of bronze, they have good corrosion resistance.
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.
O'all | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Flow Coefficient (Cv) | Pressure Class | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Port Type | End-to-End Lg. | Ht. | Lg. | Stem Type | Each | |
NPT Female | ||||||||||||
Bronze Body and Gate | ||||||||||||
| 1/2 | 17.5 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 2 3/16" | 5 7/8" | 2 3/16" | Rising | 0000000 | 0000000 |
| 3/4 | 32 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 2 7/16" | 6 7/16" | 2 7/16" | Rising | 0000000 | 000000 |
| 1 | 54 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 2 15/16" | 7 7/16" | 2 15/16" | Rising | 0000000 | 000000 |
| 1 1/4 | 97 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 3 1/8" | 8 11/16" | 3 1/8" | Rising | 0000000 | 000000 |
| 1 1/2 | 135 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 3 7/16" | 9 3/8" | 3 7/16" | Rising | 0000000 | 000000 |
| 2 | 230 | 125 | 400 psi @ 100° F | 175 psi @ 800° F | -20° to 100° | Full | 3 7/16" | 10 9/16" | 3 7/16" | Rising | 0000000 | 000000 |