Pressurising pump for terpsray - has membrane operated by means of incompressible fluid

摘要

The spray circuit consists of a membrane pump supplying water to a spray lance with a venturi inductor to induce the required amount of cleaning fluid. The circuit is equipped with an automatic bypass and a pressure regulating, manual bypass. The membrane (30) of the pump of the circuit separates the fluid chamber (34), for the spray water, from the working chamber (31). The latter is filled with an incompressible fluid to impart the action of the piston (35) to the membrane. In this way, the pressure is equalised on both sides of the piston membrane and shearing forces are eliminated.