Choose the basic principle and structure of solenoid valve according to the main parameters of working pressure.

1. Pound level: This main parameter has the same meaning as other general valves, depending on the pound level of the pipeline.

2, working pressure difference: zero below must use direct moving type or layer by layer real-time type.

Low working pressure differential is 0. 04Mpa above the use of indirect leading vacuum packaging and siphon pipe vacuum pump solenoid valve.

2, working pressure range: within the allowable range of the solenoid valve, the general working pressure is more than 1Mpa to choose the reliable durability of the piston rod structure.

It is more cost-effective to adopt pulse damper structure for double acting solenoid valve below 1.0mpa.

Through solenoid valve power supply voltage selection:

1. Use AC and DC solenoid valves according to the switching power supply type of the steam solenoid valve power supply system. Generally speaking, ac power is easy to obtain.

2. AC380V and DC 24V are preferred for working voltage specifications and models.

3, power supply voltage fluctuation general communication using +%10%. 15%, dc container ±10 or so, deviation, must be taken to stabilize the tube countermeasures, clearly put forward a unique order provisions.

4. Select rated voltage and power consumption based on the power supply capacity of the switch. When the VA value is high, the indirect guide solenoid valve is preferred when the volume is insufficient.

It must be noted that reasonableness takes into account not only the market price of the commodity, but also its function, quality, cost of installation inspection and accessories. In addition, a solenoid valve in all automatic control system software, in all automatic control system software even in the production line, the cost is minimal. If it is just cheap and the choice is wrong, the harm to the group will be great.