47-1/47-4 - Flow and differential pressure or pressure regulators - installation in inlet flow pipes
The Type 47-1 (and 47-4) self-operated differential pressure and flow regulators for installation in the inlet flow pipe are designed to work in district heating systems or industrial plants.
The regulators consist of a valve with adjustable restriction to adjust the flow rate and an actuator with two operating diaphragms. The regulators limit the flow rate. The set point for the flow rate is adjusted at the valve. The set point for the differential pressure or downstream pressure is adjusted at the diaphragm actuator. The largest signal is always used to control the regulator.
