Solenoid valves are mechanical devices operated by electromagnetic induction, used in industrial control systems to adjust the orientation of substances, total flow, rate and other major parameters. The solenoid valve can cooperate with different power circuits to complete the predicted operation, and the coordination of the operation can be ensured. There are many kinds of solenoid valves, different solenoid valves in different parts of the control system to give full play to, common is this product, valve, bearing pressure regulator, rate regulation valve, etc.
"Several" is to see that the solenoid valve has several working states, it can be said that it is several, if there is a pneumatic component symbol, on the symbol representing the valve body square (there is an arrow or T line) there are several is several. What does the position and pass of the solenoid valve represent?
"Several passes" means that there are several points on one of the squares (the point where the arrow line and the T-line intersect), which is how many passes.
Several passes: If according to the number of switching ports of the valve (including input ports, output ports, exhaust ports) to classify, there are two-way valves, three-way valves, four-way valves, five-way valves, etc.
Several: the working position of the spool is referred to as "bit", and several working (switching) positions of the spool become several valves. A valve whose spool has three working positions becomes a three-position valve. When the spool is in the middle position, the port is closed, it is called the middle closed, and all the outlets are connected with the exhaust port, it is called the middle pressure relief type, if the output outlets are connected with the input port, it is called the middle pressure type.
Solenoid valve "on" and "bit" "on" and "bit" is an important concept of pneumatic reversing solenoid valve. Different "pass" and "bit" constitute different types of pneumatic reversing solenoid valves. Usually referred to as "two-position valve", "three-position valve" means that the valve spool of the reversing valve has two or three different working positions.
The so-called "two-way valve", "three-way valve", "four-way valve" means that there are two, three, four interfaces on the valve body of the reversing valve that are not connected and can be connected with different pipelines or gas channels in the system, and different oil/gas paths can only be communicated by the switch of the valve port when the spool is shifted. The meanings of graphic symbols are generally as follows: (1) The box indicates the working position of the valve, and several boxes indicate several "bits";
(2) The arrow in the box indicates that the gas path is on, but the direction of the arrow does not necessarily indicate the actual direction of the gas flow;
(3) The symbol "┻" or "┳" in the box indicates that the channel is not available;
(4) The number of interfaces connected to the outside of the box is several, which means several "pass".