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Solenoid Valve Supplier
inquiry@ato.com.cnSolenoid Valve Symbols
The solenoid valve symbols are the schematic diagram used to describe functions of the solenoid valve. The schematic diagram is usually applied to the pneumatic system design and product identifications for pneumatic system designers and solenoid valve users to get a thorough understanding of product functions. In the design process, the gas circuit drawing should be paid attention to frequently. Various solenoid valves are transformed into corresponding pneumatic symbols on the drawing. The means of representation is reflected as symbols of solenoid valve.
The solenoid valve symbols constitute of the box, arrow, "T" and characters. The meaning of the solenoid valve symbols is as below.
1. Use the box to indicate the working position of the solenoid valve. Every box indicates one working position of the solenoid valve, namely "position". The number of positions are decided by the number of boxes. For example, the ATO 2-position 3-way solenoid valve means that there are two working positions.
2. The arrow within the box indicates the connection status of the oil port, but the arrow direction does not necessarily indicate the actual fluid direction.
3. Within the box, the symbol, "┻" or "┳", means the channel is not barrier-free.
4. The number of the ports that are connected outside of the box means the number of "Way" of the solenoid valve.
5. Generally, the valve ports are labeled by different letters or numbers, but there are still widely-accepted one. "P" indicates the inlet port. The outlet ports are implied by the letter "A" and "B". "R" and "S" refers to the exhaust ports.
6. The reversing valve has two or more than two working positions, one of which is a constant position or a position of the valve core without suffering the manipulating power. In the middle of the drawing is the constant position of the three-position valve. The two-position valve making use of the spring resetting has the access state within the box and close to the spring as its constant position. In drawing the system drawing, the oil/gas circuit should be connected with the constant position of the reversing valve.
The schematic diagram of solenoid valve is as below.
The number of positions mentioned above depends on the number of the valve's working states. If there are symbols of pneumatic elements, it is easier to understand. For example, the square on the drawing indicate the valve body (There are arrows or T lines). The number of squares is equal to the number of positions. The number of ports represents the number of points on the square (The points are points where the arrow lines and T lines intersect).
The 3-position 5-port solenoid valve has three forms.
1. Center closed
When two coils do not provide electricity, the pressure of the front cavity and the back cavity of the cylinder maintains the state when the last coil loses the power and the inlet port is closed.
2. Center open
When two coils do not provide electricity, the front cavity and the back cavity of the cylinder do not have the pressure, and the inlet port is closed off. The pressure within the back and front cavity of the air cylinder is discharged via two outlets of the solenoid valve.
3. Center pressure
When two coils do not provide electricity, the pressure of the front cavity and the back cavity of the cylinder maintains the state when the last coil loses the power, and the pressure is constantly provided to ensure consistency between the pressure of the back and front cavity of the air cylinder and the inlet pressure. The inlet is opened and the outlet is closed.
Simply put, the effect of these three types is the same when the two coils are distributed electrified. The difference is that they are connected to the upper cylinder and the two coils are not electrified.
The medium sealing is applicable to pressure-maintaining circuit; the medium pressure is applicable to pressure-adjusting circuit; the medium discharging is applicable to the load-discharging circuit.
The solenoid valve symbols constitute of the box, arrow, "T" and characters. The meaning of the solenoid valve symbols is as below.
1. Use the box to indicate the working position of the solenoid valve. Every box indicates one working position of the solenoid valve, namely "position". The number of positions are decided by the number of boxes. For example, the ATO 2-position 3-way solenoid valve means that there are two working positions.
2. The arrow within the box indicates the connection status of the oil port, but the arrow direction does not necessarily indicate the actual fluid direction.
3. Within the box, the symbol, "┻" or "┳", means the channel is not barrier-free.
4. The number of the ports that are connected outside of the box means the number of "Way" of the solenoid valve.
5. Generally, the valve ports are labeled by different letters or numbers, but there are still widely-accepted one. "P" indicates the inlet port. The outlet ports are implied by the letter "A" and "B". "R" and "S" refers to the exhaust ports.
6. The reversing valve has two or more than two working positions, one of which is a constant position or a position of the valve core without suffering the manipulating power. In the middle of the drawing is the constant position of the three-position valve. The two-position valve making use of the spring resetting has the access state within the box and close to the spring as its constant position. In drawing the system drawing, the oil/gas circuit should be connected with the constant position of the reversing valve.
The schematic diagram of solenoid valve is as below.
The number of positions mentioned above depends on the number of the valve's working states. If there are symbols of pneumatic elements, it is easier to understand. For example, the square on the drawing indicate the valve body (There are arrows or T lines). The number of squares is equal to the number of positions. The number of ports represents the number of points on the square (The points are points where the arrow lines and T lines intersect).
The 3-position 5-port solenoid valve has three forms.
1. Center closed
When two coils do not provide electricity, the pressure of the front cavity and the back cavity of the cylinder maintains the state when the last coil loses the power and the inlet port is closed.
2. Center open
When two coils do not provide electricity, the front cavity and the back cavity of the cylinder do not have the pressure, and the inlet port is closed off. The pressure within the back and front cavity of the air cylinder is discharged via two outlets of the solenoid valve.
3. Center pressure
When two coils do not provide electricity, the pressure of the front cavity and the back cavity of the cylinder maintains the state when the last coil loses the power, and the pressure is constantly provided to ensure consistency between the pressure of the back and front cavity of the air cylinder and the inlet pressure. The inlet is opened and the outlet is closed.
Simply put, the effect of these three types is the same when the two coils are distributed electrified. The difference is that they are connected to the upper cylinder and the two coils are not electrified.
The medium sealing is applicable to pressure-maintaining circuit; the medium pressure is applicable to pressure-adjusting circuit; the medium discharging is applicable to the load-discharging circuit.
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