SAFETY APPARATUS OF BOILER CIRCULATION PUMP

摘要

The system has a circulating pump (1) to move the water between the reservoir and the system. The inlet tube (2) of the pump has monitors for temperature and pressure. The values are digitised and processed by a micro computer (7) to generate control signals for the pump. If the pressure/temperature values fall outside programmed levels, then the pump is stopped and an alarm operated. The system detects the onset of cavitation and prevents the pump from operating below its programmed level. The minimum inlet pressure for the pump, corresponding to particular temperature provides a reference value for the control.