About Gradual On/Off Valves
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Flanged Gradual On/Off Valves
Rising Stem, and
Four Bolt Holes
Rising Stem, and
Eight Bolt Holes
Easier to install and remove than threaded or weld-on valves, these valves bolt to flanges. They’re often used in lines requiring frequent cleaning and maintenance, such as those for slurries. They open and close gradually, preventing system damage from sudden starts and stops in flow. Also known as gate valves.
Valves with a wheel handle open and close with multiple turns, providing more controlled, shock-resistant flow than valves with a pull handle. Valves with a rising stem lift the handle as they open and lower 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. This makes them good for critical lines and lines that need to be opened and closed frequently.
316 stainless steel valves have the best 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.
- Valve Type: Gate
- For Use With: Water, Oil, Air, Steam
- Specifications Met: American Petroleum Institute Standard 603, ASME B16.34
O'all | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Pressure Class | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Bolt Hole Dia. | Bolts Included | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | Packing Material | End-to-End Lg. | Ht. | Lg. | Each | |
Flanged Stem Housing | ||||||||||||||||
| 1 | 150 | 4 1/4" | 3 1/8" | 4 | 5/8" | No | 80 | 275 psi @ 100° F | 150 psi @ 350° F | -20° to 450° | PTFE Plastic | 5" | 11 5/16" | 4 3/4" | 47305K34 | 0000000 |
| 1 1/2 | 150 | 5" | 3 7/8" | 4 | 5/8" | No | 300 | 275 psi @ 100° F | 150 psi @ 350° F | -20° to 450° | PTFE Plastic | 6 1/2" | 14 5/16" | 7 7/8" | 47305K35 | 00000000 |
| 2 | 150 | 6" | 4 3/4" | 4 | 3/4" | No | 360 | 275 psi @ 100° F | 150 psi @ 350° F | -20° to 450° | PTFE Plastic | 7" | 16" | 7 7/8" | 47305K36 | 00000000 |
| 3 | 150 | 7 1/2" | 6" | 4 | 3/4" | No | 1,150 | 275 psi @ 100° F | 150 psi @ 350° F | -20° to 450° | PTFE Plastic | 8" | 22 1/4" | 9 13/16" | 47305K38 | 00000000 |
| 4 | 150 | 9" | 7 1/2" | 8 | 3/4" | No | 2,150 | 275 psi @ 100° F | 150 psi @ 350° F | -20° to 450° | PTFE Plastic | 9" | 25 15/16" | 9 13/16" | 47305K39 | 00000000 |
| 6 | 150 | 11" | 9 1/2" | 8 | 7/8" | No | 4,150 | 275 psi @ 100° F | 195 psi @ 350° F | -20° to 450° | PTFE Plastic | 10 1/2" | 34 5/8" | 11 13/16" | 47305K201 | 00000000 |
| 8 | 150 | 13 1/2" | 11 3/4" | 8 | 7/8" | No | 5,250 | 275 psi @ 100° F | 195 psi @ 350° F | -20° to 450° | PTFE Plastic | 11 1/2" | 42 5/8" | 13 13/16" | 47305K202 | 00000000 |