... 58000PSI/400BAR7,Pump, water tank.8,20Mpa pressure automatic stop switch9,Charging connector and hose10,Power cord11,Vent valve12,Control ... direction, and open the vent valve.5,Test the pressure, high pressure vent (at the quick layup) is installed with one ... of cooling water system.Resolvents: Change the high pressure piston or cleaning the high pressure retaining valve, and cleaning the cooling system ...