1. Several ports: If classified according to the number of valve switching ports (including input ports, output ports, and exhaust ports), there are two-way valves, three-way valves, four-way valves, five-way valves, etc.
2. Several positions: The working position of the spool is referred to as "position", and the spool has several working (switching) positions to become several position valves. A valve with three working positions of the spool becomes a three-position valve. When the spool is in the middle position, each port is closed, it is called an intermediate closed type, and each output port is connected to the exhaust port, it is an intermediate pressure relief type. If the output port is connected to the input port, it is called an intermediate type Pressurized.
Installation attention
1. When installing, it should be noted that the arrow on the valve body should be consistent with the flow direction of the medium. Do not install in places where there is direct dripping or splashing. The solenoid valve should be installed vertically upwards;
2. The solenoid valve should be guaranteed to work normally within the fluctuation range of the power supply voltage of 15%-10% of the rated voltage;
3. After the solenoid valve is installed, there must be no reverse pressure difference in the pipeline. And it needs to be powered on several times to make it suitable for temperature before it can be officially put into use;
4. The pipeline should be thoroughly cleaned before installing the solenoid valve. The incoming medium should be free of impurities. Install filter before valve;
5. When the solenoid valve fails or is cleaned, in order to ensure the continuous operation of the system, a bypass device should be installed.
working principle
The solenoid valve has a closed cavity, with through holes at different positions, each hole is connected to a different oil pipe, the middle of the cavity is a piston, and two electromagnets are on both sides, which can be opened or closed by controlling the movement of the valve body. The oil inlet hole is normally open, the hydraulic oil will enter different oil discharge pipes, and then the piston of the oil cylinder is pushed by the pressure of the oil, and the piston rod drives the mechanical device.
