Excavator accessory R215-7 R290-7 AV280 gun XKBF-00428 31N8-17430

Proportional valve and solenoid valve difference

     Proportional valves are divided into direct proportional valves and reverse proportional valves. Adjustable air pressure. The solenoid valve can only function as a switch. The solenoid valve is a valve that can only be powered on and off, and the proportional valve is a valve that can control the opening degree. To put it simply, the proportional valve is used to adjust the pressure. Speed. Ordinary solenoid valve reversing action

The main relief valve is installed on the upper and lower ends of the main control valve, one upper and one lower. The valve sets the maximum pressure for the entire hydraulic system to work. When the system pressure exceeds the set pressure of the main relief valve, the main relief valve opens the oil circuit of the return tank to overflow the hydraulic oil back to the tank to protect the entire hydraulic system and avoid excessive oil pressure. Main relief valve A relief valve located on the distributor valve body, its role is to limit the maximum pressure of the entire hydraulic system to protect the entire system from damage, if the spring in the valve breaks or the setting pressure is too low, it will lead to the pressure of the entire system is too low, because the pressure relief of the main relief valve makes the entire hydraulic system unable to establish the pressure required for the normal operation of the equipment. The main pump pressure oil can not promote the normal work of the actuator, there will be slow or even no action of the whole car, at this time should be checked to replace or adjust the main relief valve.