Single Stage Main Relief Valve PC120-6

This single stage main relief valve Model YH-013 belongs to Pressure Relief Valve, dedicated to 12-ton old LS load-sensing mini crawler excavators Komatsu PC100-6, PC120-6 and PC130-6 equipped with HPV75 variable displacement main pump, OEM Part No.723-30-90400 / 723-30-90101, commonly known as full system main safety valve. It is installed on main oil inlet cartridge cavity of main control valve, serving as core pressure stabilizing & safety component limiting maximum pressure of full machine hydraulic system. Cooperated with Hydraulic Safety Valve and Hydraulic Relief Valve, it forms two-stage hydraulic safety circuit together with LS selector valve, cylinder suction valve, travel/swing auxiliary relief valves to realize primary high-pressure protection for whole machine + secondary buffer protection for all branches. Standard system rated relief pressure reaches 32.5MPa (325bar), instantaneous impact peak pressure up to 34.0MPa, maximum system withstand pressure 35MPa, maximum s…

Pressure Relief Valve Hydraulic Control Valves PU Mixing Head