Natural gas pull-off valve hydraulic valve is the most commonly used system in industrial production. It is mainly used to control the flow direction of oil in the hydraulic system, and it can also effectively adjust the pressure and flow. There are three main types of hydraulic valves, namely pressure valves, directional valves and flow valves. For valves with the same shape, companies can choose different functions according to their different mechanisms. Although there are many types of hydraulic valves, there is always a basic commonality between them.
From the perspective of the structure of the hydraulic valve, all hydraulic valves include the valve body, the valve core, and the components that drive the hydraulic valve core to move. The components here mainly refer to springs and electromagnets. In fact, the working principle of all hydraulic valves is the same. Their opening size, pressure difference between the inlet and outlet of the valve, and the flow through the valve must meet a certain proportional relationship, and various hydraulic valves can control their different Parameters.
Divided into one-way valve and directional valve according to use. Non-return valve: only allows the fluid to be connected in the pipeline in one direction and shuts off in the reverse direction. Reversing valve: change the on-off relationship between different pipelines. According to the working position of the valve core in the valve body, it is divided into two, three, etc .; according to the number of controlled channels, it is divided into two, three, four, five, etc .; according to the valve driving method, it is divided into manual, motorized, and electric , Hydraulic and so on. Figure 2 shows the working principle of a three-position four-way directional valve. P is the oil supply port, O is the oil return port, and A and B are the output ports to the actuator. When the spool is in the neutral position, all ports are cut off, and the actuator is not moving. When the spool is moved to the right position, P and A are connected, and B and O are connected. When the spool is moved to the left, P and B Pass, A and O pass. In this way, the actuator can move forward and backward. Natural gas break-off valve