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.