Gate Valves

Gate valves, also known as slide valves, have a linear motion that incorporate a flat closure called a gate. Gate valves can either include a hand wheel, that requires multiple cranks, that you can turn (counterclockwise) to open or (clockwise) to close, or you will need to push or pull the gate to operate the gate valve. Both designs minimize the drop in pressure across the valve. When fully opened, the diameter of the opening is the same diameter as the pipe as to which the fluid is flowing and no direction of flow is being altered. 

Common applications for gate valves are systems that handle viscous liquids like heavy oil or light grease.