The Mercoid Pressure Controller Series DA is the industry standard pressure switch for fire pump controls.
Use Mercoid Pressure Controller for fire pump controls to operate pumps which supply water to building fire sprinkler systems, turning on the main pumps when system pressure falls due to sprinkler heads being activated and turning on smaller make-up pumps to maintain system pressure which may fluctuate due to small leaks. These controls almost always employ the Mercoid DA Series pressure switch due to its rugged design which provides high reliability over long periods of infrequent operation. The DA Series switch provides independent high and low setpoints over the entire pressure range of the switch to meet varying requirements from system to system More Info. The low setpoint maintains minimum pressure required for proper system operation while the high setpoint prevents damage due to over-pressurization of the system.