Description

The valve regulates the maximum system pressure by varying the flow rate discharged from the bypass. The adjustment is carried out by varying, by means of a piston, the position of a sphere that partially closes the bypass light. When the gun closes, a non-return valve closes isolating the section of circuit downstream of the valve: the pressure peak that remains trapped is used to control the complete opening of the bypass. All the flow rate supplied by the pump is then discharged in low pressure from the bypass and the pump works in low pressure.