SIERRA model 7500 is an eccentric disc seated - double eccentric - butterfly valves. Valves body and discs are designed to provide minimal flow resistance. Precise tightness is inssured on both sides.

The model 1600 Altitude Valve is a hydraulically operated, diaphragm actuated, control valve that allows flow into the elevated tank in order to maintain the level at the designated maximum. The valve modulates to maintain the tank level. As the reservoir level drops the main valve is open proportionally to increase the filling