hydraulic main relief valve assy fit hd800 hd900 hd1250-5 hd1250-7 excavator

steel relief valve with seals. it is used for the main control valve hydraulic system. it is made in standards and the working performance is stable and perfect. the relief valve groups prevent excessive pressure buildup by releasing fluid when the safety threshold has been reached. it may fit many other machines. please refer to the given part numbers and the ps to check more compatible models. excavator spare parts including bearings, gears, seal kits, engine parts, motors, pumps, solenoids, valves, etc..syi