About Gradual On/Off Valves
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Flanged Gradual On/Off Valves
Nonrising Stem, and
Four Bolt Holes
Nonrising Stem, and
Eight Bolt Holes
Rising Stem, and
Four Bolt Holes
Rising Stem, and
Eight Bolt Holes
Bolt these valves to flanges. They gradually open and close to prevent system damage from suddenly starting and stopping flow.
Epoxy-coated cast iron valves are more corrosion resistant than plain cast iron or steel valves.
Wheel handles open and close with multiple turns, providing more controlled, shock-resistant flow than pull handles.
Nonrising stems stay in the same position whether the valve is open or closed. Valves with nonrising stems are often used underground and in other low-clearance locations.
Rising stems lift as the valve opens and lower as the valve closes to provide a visual indication of whether flow is on or off. The stem is isolated from the process media for a longer service life than valves with a nonrising stem.
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.
- Valve Type: Gate
- For Use With: Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam
O'all | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Bolt Hole Dia. | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Pressure Class | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
| 2 | 3/4" | 6" | 4 3/4" | 4 | 125 | 200 psi @ 150° F | 125 psi @ 350° F | -20° to 450° | 7" | 14" | 7" | 00000000 | 0000000 |
| 2 1/2 | 3/4" | 7" | 5 1/2" | 4 | 125 | 200 psi @ 150° F | 125 psi @ 350° F | -20° to 450° | 7 1/2" | 16" | 7 1/2" | 00000000 | 000000 |
| 3 | 3/4" | 7 1/2" | 6" | 4 | 125 | 200 psi @ 150° F | 125 psi @ 350° F | -20° to 450° | 8" | 17 1/4" | 8" | 00000000 | 000000 |
| 4 | 3/4" | 9" | 7 1/2" | 8 | 125 | 200 psi @ 150° F | 125 psi @ 350° F | -20° to 450° | 9" | 20 1/4" | 9" | 00000000 | 000000 |
| 6 | 7/8" | 11" | 9 1/2" | 8 | 125 | 200 psi @ 150° F | 125 psi @ 350° F | -20° to 450° | 10 1/2" | 26 1/2" | 10 1/2" | 00000000 | 00000000 |
- Valve Type: Gate
- For Use With: Water, Air
- Specifications Met: ASME B16.10, ASTM A126 Class B, AWWA C509, MSS-SP-70
O'all | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Bolt Hole Dia. | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Pressure Class | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
| 3 | 3/4" | 7 1/2" | 6" | 4 | 125 | 200 psi @ 140° F | 35° to 140° | 8" | 14" | 8" | 00000000 | 0000000 |
| 4 | 3/4" | 9" | 7 1/2" | 8 | 125 | 200 psi @ 140° F | 35° to 140° | 9" | 17" | 9" | 00000000 | 000000 |
| 6 | 7/8" | 11" | 9 1/2" | 8 | 125 | 200 psi @ 140° F | 35° to 140° | 10 1/2" | 22 5/16" | 10 1/2" | 00000000 | 00000000 |
- Valve Type: Gate
- For Use With: Water, Air
- Specifications Met: ASME B16.10, ASTM A126 Class B, AWWA C509, FM Approved, MSS-SP-70, UL Listed
O'all | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Bolt Hole Dia. | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Pressure Class | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
| 2 1/2 | 3/4" | 7" | 5 1/2" | 4 | 125 | 200 psi @ 140° F | 35° to 140° | 7 1/2" | 17 3/8" | 7 1/2" | 00000000 | 0000000 |
| 3 | 3/4" | 7 1/2" | 6" | 4 | 125 | 200 psi @ 140° F | 35° to 140° | 8" | 19 3/8" | 8" | 00000000 | 00000000 |
| 4 | 3/4" | 9" | 7 1/2" | 8 | 125 | 200 psi @ 140° F | 35° to 140° | 9" | 22 3/4" | 9" | 00000000 | 00000000 |
| 6 | 7/8" | 11" | 9 1/2" | 8 | 125 | 200 psi @ 140° F | 35° to 140° | 10 1/2" | 29 1/4" | 10 1/2" | 00000000 | 00000000 |
| 8 | 7/8" | 13 1/2" | 11 3/4" | 8 | 125 | 200 psi @ 140° F | 35° to 140° | 11 1/2" | 36" | 11 1/2" | 00000000 | 00000000 |