Description

These valves are used to control the water level in tanks; as the water level rises and as a result the float of the valve control circuit rises, force is applied to the pilot and ultimately it closes, followed by an increase in pressure above the diaphragm and the movement of the diaphragm and disc assembly downwards, closing the valve outlet. Conversely, as the water level in the tanks drops and as a result the float of the valve control circuit drops and the force is removed from the pilot and ultimately it opens, the pressure inside the diaphragm chamber also decreases and the valve opens its outlet section.