About Gradual On/Off Valves
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Tight-Seal Flanged Gradual On/Off Valves
A rubber-coated gate, also known as a resilient wedge, compresses against the valve seat to give these valves a tight, leakproof seal. They shut tight even when they’re installed vertically, have low back pressure, or the liquid contains solids and debris. Often called gate valves, they open and close gradually to prevent sudden starts and stops that can damage your system. Since they bolt onto flanges, they’re easier to install and remove than threaded and weld-on valves. This makes them a good choice for lines that need frequent cleaning and maintenance. You can use them in lines for water supply, reclamation, and wastewater treatment—they meet AWWA (American Water Works Association) specifications. To protect against corrosion, the body is coated with epoxy.
The stem is nonrising, so it stays in the same position whether the valve is open or closed. They’re often used in low-clearance spots. Their flanged stem housing bolts in place to make them easy to take apart for repairs. However, the flanged stem housing makes these valves heavier and larger than valves with threaded or welded stem housings.
Wrench-operated valves work well in hard-to-reach places, such as underground or the bottom of manholes, since you can turn the flow on or off from a distance. Open and close them with T-handle valve wrenches.
Ductile iron valves are stronger and more durable than cast iron valves, handling 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: Water, Air
- Specifications Met: ASME B16.10, ASTM A126 Class B, AWWA C509, MSS-SP-70
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 | ||||||||||||||
| 3 | 125 | 7 1/2" | 6" | 4 | 3/4" | No | Not Rated | 200 psi @ 140° F | 35° to 140° | 8" | 14" | 8" | 47575K13 | 0000000 |
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | Not Rated | 200 psi @ 140° F | 35° to 140° | 9" | 17" | 9" | 47575K14 | 000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | Not Rated | 200 psi @ 140° F | 35° to 140° | 10 1/2" | 22 5/16" | 10 1/2" | 47575K15 | 00000000 |

- Valve Type: Gate
- For Use With: Water
- Specifications Met: AWWA C515
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 | ||||||||||||||
| 3 | 125 | 7 1/2" | 6" | 4 | 3/4" | No | 109 | 250 psi @ 100° F | 0° to 175° | 8" | 16" | 8" | 6807N11 | 0000000 |
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | 190 | 250 psi @ 100° F | 0° to 175° | 9" | 18 3/8" | 9 7/8" | 6807N12 | 000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | 427 | 250 psi @ 100° F | 0° to 175° | 10 1/2" | 24 5/8" | 12 5/8" | 6807N13 | 000000 |

- Valve Type: Gate
- For Use With: Water
- Specifications Met: AWWA C515
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 | Each | |
Flanged Stem Housing | ||||||||||||||||
| 3 | 125 | 7 1/2" | 6" | 4 | 3/4" | No | 109 | 250 psi @ 100° F | 0° to 175° | 8" | 16" | 8" | External Square | 2" | 6807N14 | 0000000 |
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | 190 | 250 psi @ 100° F | 0° to 175° | 9" | 18 3/8" | 9" | External Square | 2" | 6807N15 | 000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | 427 | 250 psi @ 100° F | 0° to 175° | 10 1/2" | 24 5/8" | 10 1/2" | External Square | 2" | 6807N16 | 000000 |
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.
Valves with a wheel handle open and close with multiple turns for controlled, shock-resistant flow.
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. 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.
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: Air, Water
- Specifications Met: ASME B16.10, ASTM A126 Class B, AWWA C509, FM Approved, MSS-SP-70, UL Listed
O'all | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Pressure Class | Flange OD | Bolt Circle Dia. | No. of Bolt Holes | Bolt Hole Dia. | Bolts Included | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Each | |
Flanged Stem Housing | |||||||||||||
| 2 1/2 | 125 | 7" | 5 1/2" | 4 | 3/4" | No | 200 psi @ 140° F | 35° to 140° | 7 1/2" | 17 3/8" | 7 1/2" | 47815K21 | 0000000 |
| 3 | 125 | 7 1/2" | 6" | 4 | 3/4" | No | 200 psi @ 140° F | 35° to 140° | 8" | 19 3/8" | 8" | 47815K22 | 000000 |
| 4 | 125 | 9" | 7 1/2" | 8 | 3/4" | No | 200 psi @ 140° F | 35° to 140° | 9" | 22 3/4" | 9" | 47815K23 | 00000000 |
| 6 | 125 | 11" | 9 1/2" | 8 | 7/8" | No | 200 psi @ 140° F | 35° to 140° | 10 1/2" | 29 1/4" | 10 1/2" | 47815K24 | 00000000 |
| 8 | 125 | 13 1/2" | 11 3/4" | 8 | 7/8" | No | 200 psi @ 140° F | 35° to 140° | 11 1/2" | 36" | 11 1/2" | 47815K25 | 00000000 |

- Valve Type: Gate
- For Use With: Air, Water
- Specifications Met: AWWA C515, FM Approved, UL Listed
O'all | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | 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 | |||||||||||||
| 3 | 7 1/2" | 6" | 4 | 3/4" | No | 108 | 300 psi @ 100° F | 35° to 170° | 8" | 23" | 7 7/8" | 6276N11 | 0000000 |
| 4 | 9" | 7 1/2" | 8 | 3/4" | No | 188 | 300 psi @ 100° F | 35° to 170° | 9" | 27 1/16" | 10" | 6276N12 | 000000 |
| 6 | 11" | 9 1/2" | 8 | 7/8" | No | 423 | 300 psi @ 100° F | 35° to 170° | 10 1/2" | 35 1/4" | 12" | 6276N13 | 000000 |
| 8 | 13 1/2" | 11 3/4" | 8 | 7/8" | No | 757 | 300 psi @ 100° F | 35° to 170° | 11 1/2" | 45 3/16" | 15 3/4" | 6276N14 | 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.
FM-approved valves are used in fire suppression and protection systems. They help isolate parts of water supply systems in buildings and plants.
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 | Yes | 423 | 300 psi @ 100° F | 35° to 170° | 10 1/2" | 24 1/2" | 10 1/2" | Water | AWWA C515, FM Approved, UL Listed | 6385N11 | 0000000 |
| 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 | 6385N12 | 00000000 |
Gradual On/Off Valves with Push-to-Connect Fittings

- Valve Type: Gate
- For Use With: Water
- Seal Material: Buna-N Rubber
- Specifications Met: AWWA C515
For strong, permanent connections that are quick to install, push PVC pipe into these valves and a rubber ring grips it. Also known as gate valves, they open and close gradually to prevent damage to your system from sudden changes in flow. They meet AWWA (American Water Works Association) C515 for use in large-scale industrial cleaning and cooling water lines. Made of ductile iron, these valves are stronger than cast iron valves, so they resist cracking from pressure changes. The body is coated with epoxy to protect against corrosion. These valves have a rubber-coated gate, also known as a resilient wedge, that compresses against the valve for a long-lasting, leakproof seal. They'll seal tightly even when installed vertically, there's low back pressure, or the liquid contains solids and debris.
These valves fit well in tight spaces since the stem doesn’t rise when they open and they don’t have a handwheel. They’re wrench operated, which prevents them from opening accidentally when bumped or snagged. Use a valve wrench to open and close the valve with minimal effort. Their flanged stem housing, also known as a bolted bonnet, bolts in place so you can take them apart for repairs. However, the flanged stem housing makes these valves heavier and larger than valves with threaded or welded stem housings.
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) | Max. Pressure | Temp. Range, °F | End-to-End Lg. | Ht. | Lg. | Stem Type | Stem Housing Connection Style | Valve Operation | Drive Style | Drive Size | Each | |
Epoxy-Coated Ductile Iron Body and Rubber-Coated Ductile Iron Gate | |||||||||||||
Push to Connect × Push to Connect | |||||||||||||
| 3 | 109 | 250 psi @ 72° F | -20° to 100° | 12" | 16 13/16" | 12" | Nonrising | Flanged | Wrench | External Square | 2" | 7259N11 | 0000000 |
| 4 | 190 | 250 psi @ 72° F | -20° to 100° | 13 13/16" | 19 1/8" | 13 13/16" | Nonrising | Flanged | Wrench | External Square | 2" | 7259N12 | 000000 |
| 6 | 427 | 250 psi @ 72° F | -20° to 100° | 16 7/8" | 25" | 16 7/8" | Nonrising | Flanged | Wrench | External Square | 2" | 7259N13 | 000000 |

























