Electromagnetic valve is a kind of equipment that can work in corrosive, explosive and high-pressure environment, and plays an important role in industry, construction industry, medical industry and other fields. Commonly used are two-position three-way solenoid valve and two-position five-way solenoid valve. Many users are not clear about the difference between "position" and "on".
"On" and "On" of solenoid valve are important concepts of pneumatic reversing solenoid valve. Different "on" and "on" constitute different types of pneumatic reversing solenoid valves. The so-called "two-position valve" and "three-position valve" usually mean that the spool of the reversing valve has two or three different working positions.
The so-called "two-way valve", "three-way valve" and "four-way valve" mean that there are two, three and four ports on the valve body of the reversing valve that are not connected with different oil pipes or gas pipes in the system, and different oil/gas paths can only communicate with the previous ones through the switch of the valve port when the valve core shifts. You can say that the valve has several working states, especially when there are symbols of pneumatic components. The following "several links" means that there are several points (points intersecting the arrow line and the T line) on one of the squares, which are several links.
The meanings of graphic symbols are usually as follows:
(1) The working position of the valve is represented by a box, and several boxes represent several "positions";
(2) The arrow in the box indicates that the oil path is connected, but the direction of the arrow does not necessarily indicate the actual direction of liquid flow;
(3) The symbol "┻" or "┳" in the box indicates that the passage is impassable;
(4) If there are several interface connections outside the box, it means several "connections";
(5) Generally, the oil inlet/air inlet of the valve connected with the system oil supply circuit or gas is represented by the letter P; The oil return/air return port connected between the valve and the oil return/air circuit of the system is denoted by T (sometimes denoted by O); The oil port/gas port where the valve is connected to the actuator is indicated by A, B, etc. Sometimes l is used to represent the oil spill on the graphic symbol;
(6) The reversing valve has two or more working positions, one of which is the normal position, that is, the position when the valve core is out of control. The middle position in the graphic symbol is the normal position of the three-position valve. The two-position valve with spring return takes the channel state in the box close to the spring as the normal position. When drawing the system diagram, the oil/gas path should generally be connected to the normal position of the reversing valve.
Every product has different product types, and these different product types make the products more competitive. For solenoid valves, it plays an increasingly important role in many fields, but in the face of increasing market pressure, such products need more attention and attention.