About Gradual On/Off Valves
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About On/Off Valves
More
High-Pressure Threaded Gradual On/Off Valves
Designed for use in refineries and other demanding environments, these valves have a durable body that can withstand nearly twice the pressure of other gradual on/off valves. 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.
These valves have a rising stem that lifts the handle as the valve opens and lowers as the valve closes. At a glance, you can see if flow is open or closed. The stem is isolated from what's flowing through your line, giving these valves a longer lifespan than valves with a nonrising stem. Their flanged stem housing, also known as a bolted bonnet, bolts in place to make them easy to take apart for maintenance and repairs. However, the flanged stem housing makes these valves heavier and larger than valves with threaded or welded stem housings.
Full-port valves do not restrict flow. Standard-port valves slightly restrict flow.
316 stainless steel valves have excellent 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, 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° | 5 1/4" | 12 3/16" | 5 7/16" | Rising | 0000000 | 000000 |
- Valve Type: Gate
- For Use With: Water, Air, Steam
- Packing Material: Graphite
- Specifications Met: American Petroleum Institute Standard 602, ASTM A182
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 | ||||||||||
| 1/2 | 7 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 3 1/8" | 6 3/4" | 3 1/8" | Rising | 00000000 | 0000000 |
| 3/4 | 14 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 3 9/16" | 6 7/8" | 3 9/16" | Rising | 00000000 | 000000 |
| 1 | 30 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 4 3/8" | 7 7/8" | 4 3/8" | Rising | 00000000 | 000000 |
| 1 1/4 | 85 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 4 11/16" | 10" | 4 11/16" | Rising | 00000000 | 000000 |
| 1 1/2 | 100 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 4 11/16" | 10 1/2" | 4 11/16" | Rising | 00000000 | 000000 |
| 2 | 160 | 1600 psi @ 100° F | 900 psi @ 800° F | -20° to 800° | 5 1/2" | 12 3/8" | 5 1/2" | Rising | 00000000 | 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 |
Vapor-Sealing Flanged Gradual On/Off Valves
- Valve Type: Gate
- For Use With: Gasoline, Oil, Steam, Water
- Specifications Met: API 602, ASME B16.34, MSS-SP-117
Control the flow of steam, hazardous gases, and other vapors without risking leaks. These valves have an accordion-like bellows around the stem that expands as they open and contracts as they close, forming an airtight seal. If the bellows fail, a reinforced seal—also known as a backseat seal—minimizes the risk of leakage. Ideal for heating and steam service applications, they maintain their seal even as the temperature swings. Plus, the stem housing is welded to make sure nothing leaks out. Also known as gate valves, these valves open and close gradually with multiple turns of the wheel handle to prevent sudden starts and stops. They bolt onto flanges, so they’re easier to install and remove for cleaning and repairs than threaded or weld-on valves.
The handle raises as these valves open and lowers 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.
For technical drawings and 3-D models, click on a part number.
O'all | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pressure Class | Flange OD | Bolt Hole Dia. | Bolt Circle Dia. | No. of Bolt Holes | Max. Pressure | Max. Steam Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
Wheel Handle and Rising Stem—Steel Body and 420 Stainless Steel Gate | |||||||||||||
Welded Stem Housing with 321 Stainless Steel Bellows | |||||||||||||
| 1/2 | 150 | 3 1/2" | 5/8" | 2 3/8" | 4 | 285 psi @ 100° F | 80 psi @ 800° F | -20° to 800° | 4 1/4" | 11 1/2" | 4 1/4" | 0000000 | 000000000 |
| 3/4 | 150 | 3 7/8" | 5/8" | 2 3/4" | 4 | 285 psi @ 100° F | 80 psi @ 800° F | -20° to 800° | 4 9/16" | 12 3/4" | 4 9/16" | 0000000 | 00000000 |
| 1 | 150 | 4 1/4" | 5/8" | 3 1/8" | 4 | 285 psi @ 100° F | 80 psi @ 800° F | -20° to 800° | 5" | 15 1/8" | 5" | 0000000 | 00000000 |
| 1 1/2 | 150 | 5" | 5/8" | 3 7/8" | 4 | 285 psi @ 100° F | 80 psi @ 800° F | -20° to 800° | 6 1/2" | 19 1/2" | 6 1/2" | 0000000 | 00000000 |
| 2 | 150 | 6" | 3/4" | 4 3/4" | 4 | 285 psi @ 100° F | 80 psi @ 800° F | -20° to 800° | 7" | 23 1/4" | 7" | 0000000 | 00000000 |
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.
For technical drawings and 3-D models, click on a part number.
- 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 |