Automatic Gate Valve

These changes may act upon a diaphragm or a piston which in turn activates the valve.

Automatic gate valve.

Also known as 3 3 valves these valves close all ports in the off position to stop equipment in a locked position with air pressure holding it in place. Pvc gate valves slip designed for quick shutoff in low pressure or vacuum lines these quick opening valves provide unrestricted flow for low pressure tank and drain applications with liquids gases dry bulk solids and slurry. Valves may also be automatic driven by changes in pressure temperature or flow. Catalog number description inside diameter laying length diameter a b c d e f n s.

The stem may be classified as rising or non rising depending on which end is threaded. Gate valves with actuators use a threaded stem to connect the actuator to the gate via a drive nut around the threads allowing the nut to be turned with a hand wheel or motor. They can be disassembled for in line servicing. Gate valves are typically used to permit or prevent the flow of liquids and are not recommended for regulating flow.

Gate valves are typically opened and closed using a wheel shaped twist handle with either a rising or a non rising stem or by a plunger. Examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.