There is a Cast Steel Sleeve Packed Water Level Valve offered by us that is a device typically used in a water supply or distribution system when there is a need to reduce high pressure or throttle flow. The sleeve valve consists of a cylindrical gate (tube) which slides over an inner sleeve. This valve can be used to control the water level in a tank, this valve is capable to open and close itself as the liquid level changes. A float is used to mechanically operate this valve. The Cast Steel Sleeve Packed Water Level Valve is very efficient and useful.