About Gradual On/Off Valves
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High-Pressure Threaded Gradual On/Off Valves
Designed for use in refineries and other demanding environments, these durable valves have a forged steel body that can withstand at least twice the pressure of other threaded valves. They gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping 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. Their flanged stem housing bolts in place and makes them easy to take apart for maintenance and repairs.
Full-port valves do not restrict flow, while standard-port valves slightly restrict flow.
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, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam
- Packing Material: Graphite
- Specifications Met: American Petroleum Institute Standard 602, ASTM A105N
O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Stem Type | Each | |
NPT Female | ||||||||||
Full Port | ||||||||||
| 1/4 | Not Rated | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 3 1/8" | 6 5/8" | 3 7/16" | Rising | 0000000 | 000000 |
| 3/8 | 9 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 3 1/8" | 6 5/8" | 3 7/16" | Rising | 0000000 | 00000 |
| 1/2 | 20 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 3 9/16" | 7" | 3 7/16" | Rising | 0000000 | 000000 |
| 3/4 | 33 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 4 5/16" | 8 11/16" | 3 13/16" | Rising | 0000000 | 000000 |
| 1 | 60 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 5" | 9 3/4" | 5 7/16" | Rising | 0000000 | 000000 |
| 1 1/4 | 92 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 5 15/16" | 11 5/16" | 5 7/16" | Rising | 0000000 | 000000 |
| 1 1/2 | 142 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 7 1/16" | 12 15/16" | 5 7/16" | Rising | 0000000 | 000000 |
| 2 | 257 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 6" | 15 3/4" | 6 3/4" | Rising | 0000000 | 000000 |
Standard Port | ||||||||||
| 1/2 | 9 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 3 1/8" | 6 5/8" | 3 7/16" | Rising | 0000000 | 00000 |
| 3/4 | 19 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 3 9/16" | 7" | 3 7/16" | Rising | 0000000 | 00000 |
| 1 | 32 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 4 5/16" | 8 11/16" | 3 13/16" | Rising | 0000000 | 00000 |
| 1 1/2 | 92 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 5 15/16" | 11 5/16" | 5 7/16" | Rising | 0000000 | 000000 |
| 2 | 144 | 1975 psi @ 100° F | 1100 psi @ 800° F | -20° to 800° | 7 1/16" | 12 15/16" | 5 7/16" | Rising | 0000000 | 000000 |
- Valve Type: Gate
- For Use With: Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam
- Packing Material: Graphite
- Specifications Met: American Petroleum Institute Standard 602, ASTM A105N
O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Stem Type | Each | |
NPT Female | ||||||||||
Standard Port | ||||||||||
| 3/4 | 18 | 3705 psi @ 100° F | 2060 psi @ 800° F | -20° to 800° | 4 5/16" | 8 7/16" | 3 13/16" | Rising | 0000000 | 0000000 |
| 1 | 30 | 3705 psi @ 100° F | 2060 psi @ 800° F | -20° to 800° | 5" | 9 3/4" | 5 7/16" | Rising | 0000000 | 000000 |
High-Pressure Socket-Connect Gradual On/Off Valves
With a forged steel body and bolted construction, these valves can withstand nearly 10 times the pressure of other socket-connect gradual valves. Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. Also known as gate valves, they gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping flow.
The handle raises as these valves open and lowers as they close to let you know if flow is on or off. The stem also raises when on so it doesn’t contact what’s flowing through your line. This gives these valves a longer lifespan than valves with a nonrising stem. Also known as bolted bonnets, their flanged stem housing bolts in place for easy disassembly during maintenance. However, the housing makes them larger and heavier than valves with a threaded or welded housing.
Full-port valves don’t restrict flow.
Standard-port valves slightly restrict flow.
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: See Table
- Specifications Met: American Petroleum Institute Standard 602, ASTM A105N
O'all | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flow Coefficient (Cv) | Port Type | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | For Use With | Stem Type | Each | |
Socket Connect Female | ||||||||||||
| 1/4 | Not Rated | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 3 1/4" | 6 3/8" | 3 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 000000 |
| 3/8 | Not Rated | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 3 1/4" | 6 3/8" | 3 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 00000 |
| 1/2 | 5 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 3 3/16" | 6 1/2" | 3 7/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 00000 |
| 1/2 | 12 | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 3 1/2" | 7 3/8" | 3 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 00000000 | 000000 |
| 3/4 | 11 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 3 1/2" | 6 1/2" | 3 7/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 00000 |
| 3/4 | 23 | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 4 5/16" | 9 1/8" | 4 5/16" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 00000000 | 000000 |
| 1 | 25 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 4 3/8" | 8 1/4" | 4 1/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 00000 |
| 1 | 43 | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 5" | 10 1/2" | 5 3/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 00000000 | 000000 |
| 1 1/4 | 85 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 4 3/4" | 10 1/2" | 6 5/16" | Water, Air, Steam | Rising | 00000000 | 000000 |
| 1 1/2 | 77 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 5" | 10 5/8" | 6" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 000000 |
| 1 1/2 | 98 | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 5 1/4" | 13 1/2" | 5 3/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 00000000 | 000000 |
| 2 | 97 | Standard | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 5 3/8" | 11" | 6" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 0000000 | 000000 |
| 2 | 197 | Full | 1975 psi @ 100° F | 715 psi @ 800° F | -20° to 800° | 6" | 16 1/2" | 6 3/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon, Steam | Rising | 00000000 | 000000 |