Single- or multi-acting piston diaphragm pump with diaphragm held in housing determining diaphragm position and is allocated only to extreme position of diaphragm with move from suction to pressure stroke

摘要

The piston diaphragm pump has a diaphragm (6) separating primary (18) from secondary chamber (13) and is provided with a sensor for determining the position of the diaphragm, allocated only to the extreme position of the diaphragm, at the transition from suction to pressure stroke and vice versa. A control unit, evaluating the measurement value of the sensor (32), also controls the supply and discharge of the hydraulic fluid, based on the determined extreme position of the diaphragm.The sensor determines the rear extreme position of the diaphragm. The sensor determines the reaching of a specified extreme position by the diaphragm. The control unit, based on the frequency of the reaching of the extreme position, controls the supply and discharge of the hydraulic fluid by means of a valve system