Relief valve excavator ZX330 ZAX330-5G main pump relief valve 0719308

   The composition and function of the hydraulic system A complete hydraulic system is composed of five parts, namely, power components, executive components, control components, components and hydraulic oil. The role of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid, which refers to the oil pump in the hydraulic system to provide power to the entire hydraulic system. The structure of the hydraulic pump has the gear pump and the blade pump, which converts the pressure energy of the liquid into mechanical energy and drives the load for linear reciprocating movement or rotary movement. The control element controls and regulates the pressure, flow and direction of the liquid in the hydraulic system. According to the different control functions, the hydraulic valve can be divided into village force control valve, flow control valve and direction control valve. Pressure control valves are divided into benefit flow valves, pressure reducing valves, sequence valves, pressure relays, etc. Flow control valves include throttle valves, adjusting valves, diverting and collecting valves. Direction control valve includes check valve, hydraulic control check valve, shuttle valve, reversing valve, etc. According to different control methods, hydraulic valve is divided into switch type control valve, fixed value control valve and proportional control valve. Auxiliary components include oil tank, oil filter, tubing and pipe joint, sealing ring, pressure gauge, oil level oil temperature gauge, hydraulic oil is the working medium of the hydraulic system to transfer energy, there are various mineral oil, emulsion and forming hydraulic oil and other categories.