A gate valve is a valve that opens by lifting an obstruction of a fluid’s path. Gate valves need very little room along the pipe axis and will not prevent the flow of fluid when the gate is completely open. The gate faces are often wedge-shaped but can also be parallel. Generally, a gate valve is used to completely restrict fluid flow or provide a full flow when fully open. Thus, it can be used in either the fully open or fully closed positions. A typical gate valve comprises of seat and disc, valve body, spindle, gland, and a wheel for operating the valve. The gate and seat work together in shutting off the flow of fluid.
To get the right sealing when the valve is fully closed, ensure there is 360В° surface contact between the seats and disk. Gate valves
, also referred to as sluice valves, should never be used for regulation of flow as it is difficult to achieve accurate control.