About Gradual On/Off Valves
More
FM-Approved Flanged Gradual On/Off Valves
FM-approved, these valves are often used to isolate sections of your facility’s water supply for fire suppression and protection. They bolt to flanges for easier installation and removal than threaded or weld-on valves. This makes them a great choice if you have to clean and maintain your line frequently. Also known as gate valves, they open and close gradually to prevent sudden starts and stops of flow that could damage your system. Epoxy coated, these valves resist corrosion. They’re bright red, so they’re easy to identify as fire valves.
Their rubber-coated gate, also known as a resilient wedge, compresses against the valve for a long-lasting, leakproof seal. It seals tightly even if you install these valves vertically, or if there’s low back pressure. For easy disassembly during maintenance, they have a flanged stem housing that bolts in place. However, the housing makes these valves heavier and larger than valves with a threaded or welded stem housing.
Wrench-operated valves are the best choice for hard-to-reach locations, such as underground or inside a manhole. Operate them from a distance with a valve wrench. You can also open and close them with a fire indicator post.
Valves with a nonrising stem keep the handle in the same position whether they’re open or closed. They're often used underground and in low-clearance locations.
Ductile iron valves are stronger and more durable than cast iron valves. They’ll handle greater pressure changes without cracking.
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: Drinking Water, Water
- Specifications Met: FM Approved, NSF/ANSI 61, UL Listed
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. | Drive Style | Drive Size | Features | Each | |
Flanged Stem Housing | |||||||||||||||||
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | 945 | 300 psi @ 100° F | 35° to 140° | 9" | 18" | 9" | External Square | 2" | Indicator Post Mounting Flange | 0000000 | 000000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | 2,250 | 300 psi @ 100° F | 35° to 140° | 10 1/2" | 22 1/2" | 10 1/2" | External Square | 2" | Indicator Post Mounting Flange | 0000000 | 00000000 |
| 8 | 125 | 13 1/2" | 11 3/4" | 8 | 7/8" | No | 4,150 | 300 psi @ 100° F | 35° to 140° | 11 1/2" | 27 1/2" | 11 1/2" | External Square | 2" | Indicator Post Mounting Flange | 0000000 | 00000000 |
Flexible Joint Gradual On/Off Valves
- Valve Type: Gate
- For Use With: See table
- Seal Material: EPDM Rubber
- Specifications Met: See table
Flexible joints keep these valves tightly sealed during pressure changes or vibrations from heavy machinery. Also known as gate valves, they gradually open and close to prevent system damage from sudden flow changes. They have a rubber-coated gate that compresses against the valve for a long-lasting, leakproof seal. They’ll seal tightly even when installed vertically, when there’s low back pressure, or when the liquid contains solids and debris. Made of ductile iron, these valves are stronger than cast iron valves and resist cracking from pressure changes. The body is coated with epoxy to protect against corrosion. They meet at least one American Water Works Association (AWWA) standard for reliable and safe performance in water supply systems.
These valves fit well in tight spaces since the stem doesn’t rise when they open. Their flanged stem housing bolts in place for easy disassembly for maintenance and repairs. Use a valve wrench to open and close these valves. Because they require a wrench, they can’t be opened accidentally when bumped or snagged.
Valves that meet NSF/ANSI 61 are safe to use with drinking water systems.
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.
O'all | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Bolt Hole Dia. | Bolts Included | Retaining Ring Included | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | For Use With | Specifications Met | Each | |
Wrench Operated and Nonrising Stem—Red Epoxy-Coated Ductile Iron Body and Rubber-Coated Ductile Iron Gate | ||||||||||||||||
Flanged Stem Housing | ||||||||||||||||
| 6 | 11 1/16" | 9 1/2" | 4 | 7/8" | No | No | 2,250 | 300 psi @ 100° F | 33° to 180° | 11 1/2" | 22 3/4" | 11 1/2" | Water, Drinking Water | AWWA C151, AWWA C509, AWWA C515, NSF/ANSI 61 | 0000000 | 000000000 |
Plastic Socket-Connect Gradual On/Off Valves for Drinking Water
- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: See table
- Specifications Met: NSF/ANSI 61
Bond these valves to plastic pipe with PVC primer and cement (not included) to create a permanent, leak-tight connection in drinking water lines. Also known as gate valves, they open and close gradually to prevent damage to your system from sudden changes in flow. Turn the handle multiple times to start or stop flow. Safe for use in drinking water systems, these valves meet NSF/ANSI 61. They’re plastic, so they’re lighter in weight than metal valves.
All have a nonrising stem, which means that the handle won’t move up as the valve opens. This makes them good for underground and other low-clearance applications.
CPVC valves handle temperatures up to 200° F, so you can use them in hot drinking water applications.
Use repair kits to replace worn seals.
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.
Valves | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | ||||||||||||
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | Seal Material | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | Each | ||
Socket Connect Female | |||||||||||||
PVC Plastic Body—Polypropylene Plastic Gate | |||||||||||||
| 1/2 | 19 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 000000 |
| 3/4 | 37 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
| 1 | 44 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 5/16" | 5 7/16" | 3 5/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
| 1 1/2 | 144 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 3/4" | 8 1/16" | 3 3/4" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
| 2 | 333 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 15/16" | 8 9/16" | 3 15/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
CPVC Plastic Body—Polypropylene Plastic Gate | |||||||||||||
| 1 | 44 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 1/4" | 5 13/32" | 3 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 2 | 333 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Plastic Threaded Gradual On/Off Valves for Drinking Water
- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: See table
- Specifications Met: NSF/ANSI 61
A lightweight alternative to metal valves, these plastic valves have NPT connections for use with threaded pipe. All meet NSF/ANSI 61 for use in drinking water systems. 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. Since the handle sits on a nonrising stem, it stays at the same height whether these valves are open or closed. This helps them fit in underground lines and other low-clearance spots. When seals wear out, replace them using repair kits (sold separately).
PVC valves are made of the standard material used in most drinking water systems. CPVC valves resist heat up to 200° F, making them a better choice for hot water than PVC 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.
Valves | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | ||||||||||||
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | Seal Material | End-to-End Lg. | Ht. | Lg. | Stem Type | Color | Each | Each | ||
NPT Female | |||||||||||||
PVC Plastic Body and Polypropylene Plastic Gate | |||||||||||||
| 1/2 | 19 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 000000 |
| 3/4 | 37 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
| 1 | 44 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 1/4" | 5 7/8" | 3 1/4" | Nonrising | Dark Gray | 0000000 | 00000 | 00000000 | 00000 |
| 1 1/2 | 144 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 3/4" | 8 1/16" | 3 15/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
| 2 | 333 | 200 psi @ 70° F | 40° to 140° | Buna-N Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 0000000 | 000000 | 00000000 | 00000 |
CPVC Plastic Body and Polypropylene Plastic Gate | |||||||||||||
| 1/2 | 19 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 3/4 | 37 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 2 13/16" | 5 1/8" | 2 13/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 1 | 44 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 1/4" | 5 7/8" | 3 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 1 1/2 | 144 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 3/4" | 8 1/16" | 3 15/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 2 | 333 | 200 psi @ 70° F | 32° to 200° | EPDM Rubber | 3 15/16" | 8 9/16" | 4 7/16" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Threaded Gradual On/Off Valves for Drinking Water
- Valve Type: Gate
- For Use With: Drinking Water
- Specifications Met: NSF/ANSI 61
Also known as gate valves, these valves open and close gradually to prevent damage to your drinking water system from sudden starts and stops in flow. They meet NSF/ANSI 61, so they're safe to use with drinking water. Thanks to a body made of bronze, they resist corrosion.
Valves with a nonrising stem keep the stem in the same position whether they’re open or closed. They’re often used underground and in low-clearance locations.
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.
O'all | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Flow Coefficient (Cv) | Pressure Class | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
Nonrising Stem | |||||||||
NPT Female | |||||||||
Bronze Body and Gate | |||||||||
| 1/2 | 17.6 | 300 | 300 psi @ 150° F | 0° to 200° | 2" | 4 1/4" | 2" | 0000000 | 0000000 |
| 3/4 | 32 | 300 | 300 psi @ 150° F | 0° to 200° | 2 3/16" | 5 1/16" | 2 1/2" | 0000000 | 000000 |
| 1 | 54 | 300 | 300 psi @ 150° F | 0° to 200° | 2 9/16" | 5 15/16" | 2 3/4" | 0000000 | 000000 |
| 1 1/2 | 135 | 300 | 300 psi @ 150° F | 0° to 200° | 2 13/16" | 7 3/4" | 3 3/4" | 0000000 | 000000 |
| 2 | 230 | 300 | 300 psi @ 150° F | 0° to 200° | 3 5/16" | 9" | 3 3/4" | 0000000 | 000000 |
Rising Stem | |||||||||
NPT Female | |||||||||
Bronze Body and Gate | |||||||||
| 1/2 | 17.6 | 300 | 300 psi @ 150° F | 0° to 200° | 2" | 5 15/16" | 2" | 0000000 | 000000 |
| 3/4 | 32 | 300 | 300 psi @ 150° F | 0° to 200° | 2 3/16" | 6 9/16" | 2 1/2" | 0000000 | 000000 |
| 1 | 54 | 300 | 300 psi @ 150° F | 0° to 200° | 2 9/16" | 8" | 2 3/4" | 0000000 | 000000 |
| 1 1/2 | 135 | 300 | 300 psi @ 150° F | 0° to 200° | 2 13/16" | 10 13/16" | 3 3/4" | 0000000 | 000000 |
| 2 | 230 | 300 | 300 psi @ 150° F | 0° to 200° | 3 5/16" | 13 1/16" | 3 3/4" | 0000000 | 000000 |
Plastic Flanged Gradual On/Off Valves for Drinking Water
- Valve Type: Gate
- For Use With: Drinking Water
- Seal Material: Buna-N Rubber
- Specifications Met: NSF/ANSI 61
Easier to install and remove for maintenance than threaded and weld-on valves, these valves bolt and unbolt to flanges. They meet NSF/ANSI 61 for safe use in drinking water systems. Also known as gate valves, they open and close gradually with multiple turns of the wheel handle to prevent damage from sudden starts and stops in flow. Whether these valves are open or closed, the handle stays at the same height because of the nonrising stem. This helps them fit in low-clearance areas, such as underground lines. All are plastic, making them a lightweight alternative to metal valves. When the seals wear out, replace them using repair kits (sold separately).
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.
Valves | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Repair Kits | |||||||||||||||||
| 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. | Stem Type | Color | Each | Each | ||
PVC Plastic Body with Polypropylene Plastic Gate | ||||||||||||||||||
| 1/2 | 150 | 3 1/2" | 2 3/8" | 4 | 1/2" | No | 15 | 150 psi @ 70° F | 32° to 140° | 4 3/4" | 5 7/8" | 4 3/4" | Nonrising | Dark Gray | 00000000 | 0000000 | 00000000 | 000000 |
| 3/4 | 150 | 3 7/8" | 2 3/4" | 4 | 1/2" | No | 29 | 150 psi @ 70° F | 32° to 140° | 5" | 6 1/16" | 5" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 1 | 150 | 4 1/4" | 3 1/8" | 4 | 1/2" | No | 39 | 150 psi @ 70° F | 32° to 140° | 5 3/8" | 6 7/16" | 5 3/8" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 1 1/2 | 150 | 5" | 3 7/8" | 4 | 1/2" | No | 127 | 150 psi @ 70° F | 32° to 140° | 6 3/4" | 9 1/16" | 6 3/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
| 2 | 150 | 6" | 4 3/4" | 4 | 5/8" | No | 279 | 150 psi @ 70° F | 32° to 140° | 7 1/4" | 9 7/8" | 7 1/4" | Nonrising | Dark Gray | 00000000 | 000000 | 00000000 | 00000 |
Gradual On/Off Valves with Press-Connect Fittings for Drinking Water
- Valve Type: Gate
- For Use With: Drinking Water
- Specifications Met: NSF/ANSI 61
For a leak-tight connection in drinking water lines without heat or soldering, crimp the fittings on these valves to metal tubing with a press-connect crimping tool (sold separately). The fittings are comparable to Viega fittings. Also known as gate valves, they open and close gradually to prevent damage to your system from sudden changes in flow. Safe for use in drinking water systems, these valves meet NSF/ANSI 61. They have good corrosion resistance since they’re made of bronze.
Valves with nonrising stems fit well underground and in other low-clearance places since the handle doesn’t move up when the valve opens.
Valves with rising stems let you see at a glance whether flow is on or off. The handle rises as the valve opens and lowers as it closes. The stem stays separate from the material flowing through your line, reducing corrosion so they last longer than valves with nonrising stems. With a long lifespan, you can use them for critical lines and lines that need to be opened and closed frequently.
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.
| Copper Tube Size | Flow Coefficient (Cv) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | For Tube OD | Each | |
Nonrising Stem | |||||||
|---|---|---|---|---|---|---|---|
Press Connect Female | |||||||
Bronze Body and Gate | |||||||
| 1/2 | 17.6 | 200 psi @ 250° F | 0° to 250° | 5" | 5/8" | 0000000 | 0000000 |
| 3/4 | 32 | 200 psi @ 250° F | 0° to 250° | 5 3/4" | 7/8" | 0000000 | 000000 |
| 1 | 54 | 200 psi @ 250° F | 0° to 250° | 6 9/16" | 1 1/8" | 0000000 | 000000 |
| 1 1/4 | 97 | 200 psi @ 250° F | 0° to 250° | 6 7/8" | 1 3/8" | 0000000 | 000000 |
| 1 1/2 | 135 | 200 psi @ 250° F | 0° to 250° | 7 5/16" | 1 5/8" | 0000000 | 000000 |
| 2 | 230 | 200 psi @ 250° F | 0° to 250° | 9 5/16" | 2 1/8" | 0000000 | 000000 |
Rising Stem | |||||||
Press Connect Female | |||||||
Bronze Body and Gate | |||||||
| 1/2 | 17.6 | 200 psi @ 250° F | 0° to 250° | 5" | 5/8" | 0000000 | 000000 |
| 3/4 | 32 | 200 psi @ 250° F | 0° to 250° | 5 3/4" | 7/8" | 0000000 | 000000 |
| 1 | 54 | 200 psi @ 250° F | 0° to 250° | 6 9/16" | 1 1/8" | 0000000 | 000000 |
| 1 1/4 | 97 | 200 psi @ 250° F | 0° to 250° | 6 7/8" | 1 3/8" | 0000000 | 000000 |
| 1 1/2 | 135 | 200 psi @ 250° F | 0° to 250° | 7 5/16" | 1 5/8" | 0000000 | 000000 |
| 2 | 230 | 200 psi @ 250° F | 0° to 250° | 9 5/16" | 2 1/8" | 0000000 | 000000 |