Patent ID: 6752168
Filing Date: 2004-06-22
Classification: F04D,F16K,G05D,Y10T

Abstract:
A system for controlling the working conditions for mechanical pumps supplying associated devices with pressure fluid via a pipe system, comprisinga regulating valve (6) situated between at least one of the pumps (1) and an appurtenant device (5) supplied by the pump, said regulating valve being arranged to open only when the pump (1) has started up, said regulating valve comprising means for adjustment of the flow cross-section of said regulating valve to maintain downstream pressure at or above a value (P3) which is predetermined based upon specifications of the pipe system and said device (5), and to maintain the counterpressure of the pump (1) not below a given minimum value (P2) which is determined from the characteristic properties of the pump, whereby, in adjustment of said flow cross-section, priority is given to maintaining the counterpressure of the pump (1) not below said minimum value (P2) rather than to maintaining the downstream pressure of said regulating valve at or above said value (P3).