About Gradual On/Off Valves
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Threaded Gradual On/Off Valves
Also known as gate valves, these valves gradually open and close to prevent system damage from suddenly starting and stopping flow.
Valves with a pull handle open and close faster than valves with a wheel handle. Also known as slide valves, they’re often used to control flow in air conditioning and ventilation systems.
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.
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: Oil, Air, Argon, Helium, Krypton, Neon, Xenon
O'all | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | Stem Housing Connection Style | End-to-End Lg. | Ht. | Lg. | Each | |
NPT Female | |||||||||
| 1 | 80 | 20 psi @ 1000° F | -40° to 1000° | Flanged | 2 13/16" | 9 3/8" | 3 5/16" | 0000000 | 0000000 |
| 1 1/2 | 115 | 20 psi @ 1000° F | -40° to 1000° | Flanged | 2 13/16" | 9 3/8" | 3 5/16" | 0000000 | 000000 |
| 2 | 170 | 20 psi @ 1000° F | -40° to 1000° | Flanged | 2 13/16" | 10 5/8" | 4" | 0000000 | 000000 |
| 2 1/2 | 245 | 20 psi @ 1000° F | -40° to 1000° | Flanged | 2 13/16" | 11 5/8" | 4 1/2" | 0000000 | 000000 |
| 3 | 550 | 20 psi @ 1000° F | -40° to 1000° | Flanged | 3 5/16" | 12 5/8" | 5" | 0000000 | 000000 |
| 4 | 685 | 10 psi @ 1000° F | -40° to 1000° | Flanged | 3 5/16" | 14 5/8" | 6" | 0000000 | 000000 |
| 6 | 2,150 | 5 psi @ 1000° F | -40° to 1000° | Flanged | 3 13/16" | 18 5/8" | 8" | 0000000 | 000000 |
Plastic Threaded Gradual On/Off Valves
- Valve Type: Gate
- For Use With: Water
- Seat Material: See Table
Plastic provides an economical and lightweight alternative to metal. These valves gradually open and close to prevent system damage from suddenly starting and stopping flow. Pull the handle to open the valve. All valves 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.
304 stainless steel gates are more durable than glass-filled polypropylene gates.
O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Temp. Range, °F | Seat Material | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | |
NPT Female × NPT Female | ||||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | ||||||||||
| 2 × 2 | 75 psi @ 120° F | 35° to 120° | Buna-N Rubber | 3 3/8" | 9 1/2" | 3 3/8" | Rising | White | 00000000 | 000000 |
PVC Plastic Body—304 Stainless Steel Gate | ||||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | Santoprene Rubber | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | Santoprene Rubber | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
NPT Female × NPT Male | ||||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | ||||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | Buna-N Rubber | 3 3/8" | 6 1/2" | 3 3/8" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | ||||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | Santoprene Rubber | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | Santoprene Rubber | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
NPT Male × NPT Male | ||||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | ||||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | Buna-N Rubber | 3 7/16" | 8 1/2" | 3 7/16" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | ||||||||||
| 3 × 3 | 15 psi @ 120° F | 35° to 120° | Santoprene Rubber | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
Flanged Gradual On/Off Valves
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 pull handle, also known as slide valves, open and close faster than valves with a wheel handle. They’re often used as blast gates for precise flow control in low-pressure air conditioning and ventilation systems.
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.
Cast iron valves are stronger than steel valves but more brittle than steel, ductile iron, and stainless steel valves.
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: Oil, Air
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 | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
Flanged Stem Housing | ||||||||||||||
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | 685 | 10 psi @ 1000° F | -40° to 1000° | 5 1/4" | 15 5/8" | 6" | 0000000 | 0000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | 2,150 | 5 psi @ 1000° F | -40° to 1000° | 5 3/4" | 20" | 8" | 0000000 | 00000000 |
Plastic Socket-Connect Gradual On/Off Valves
Female ×
Socket-Connect Female
Female ×
Socket-Connect Male
Female ×
Threaded NPT Female
Male ×
Socket-Connect Male
- Valve Type: Gate
- For Use With: Water
For a lightweight and economical alternative to metal valves, these are made of plastic. Insert unthreaded pipe into the socket ends and bond with PVC primer and cement to create a permanent, leak-tight connection. Valves gradually open and close to prevent system damage from suddenly starting and stopping flow. Pull the handle to open the valve. All valves 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.
304 stainless steel gates are more durable than glass-filled polypropylene gates.
O'all | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | |
Socket Connect Female × Socket Connect Female | |||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | |||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | 3 3/8" | 8 1/2" | 3 3/16" | Rising | White | 00000000 | 000000 |
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 9 3/4" | 3 7/16" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | |||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
| 4 × 4 | 20 psi @ 120° F | 35° to 120° | 5 3/16" | 18" | 6 11/16" | Rising | White | 0000000 | 00000 |
| 6 × 6 | 10 psi @ 120° F | 35° to 120° | 11 1/8" | 31 1/8" | 6 5/8" | Rising | White | 0000000 | 000000 |
Socket Connect Female × Socket Connect Male | |||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | |||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | 3 3/8" | 8 1/2" | 3 1/4" | Rising | White | 00000000 | 00000 |
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 9 3/4" | 3 7/16" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | |||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
Socket Connect Female × Threaded NPT Female | |||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | |||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | 3 3/8" | 8 1/2" | 3 1/4" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | |||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |
Socket Connect Male × Socket Connect Male | |||||||||
PVC Plastic Body—Glass-Filled Polypropylene Plastic Gate | |||||||||
| 1 1/2 × 1 1/2 | 75 psi @ 120° F | 35° to 120° | 3 3/8" | 8 1/2" | 3 3/16" | Rising | White | 00000000 | 00000 |
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 9 3/4" | 3 7/16" | Rising | White | 00000000 | 00000 |
PVC Plastic Body—304 Stainless Steel Gate | |||||||||
| 2 × 2 | 40 psi @ 120° F | 35° to 120° | 3 1/2" | 10 1/4" | 3 3/8" | Rising | White | 0000000 | 00000 |
| 3 × 3 | 30 psi @ 120° F | 35° to 120° | 4 1/2" | 13" | 4 3/8" | Rising | White | 0000000 | 00000 |