How are solenoid valves and pumps used together

Solenoid valves and pumps are often used together in industrial automation systems to achieve precise control and delivery of fluids. The cooperation between them is mainly based on the following aspects of collaborative work:
​I. Overview of the working principle
Pump working principle:
The basic structure of the pump includes impeller, pump shell, motor and other components. The motor drives the impeller to rotate, and through centrifugal force, the liquid is drawn from the suction tube and accelerated out, forming a high-pressure fluid, and finally sent to the required place through the discharge tube.
The working principle of the solenoid valve:
Solenoid valve is a kind of automatic component that uses electromagnetic force to control fluid on and off. The interior contains a closed chamber and a valve body, and the movement of the valve body is controlled by the suction or release of an electromagnet to open or close the fluid channel.
Second, the use of cooperation
Flow matching:
According to the pump flow size, choose the appropriate solenoid valve diameter. Large flow pumps require large diameter solenoid valves to ensure smooth fluid passage and avoid clogging or leakage.
Pressure matching:
The working pressure range of the solenoid valve needs to match the output pressure of the pump. If the output pressure of the pump exceeds the bearing range of the solenoid valve, it may cause damage or failure of the solenoid valve.
Control logic:
In practical applications, the solenoid valve usually opens or closes the fluid channel according to the instructions of the control system. For example, in systems that require automatic control, signals can be sent to the solenoid valve via a PLC (programmable logic controller) or other control device to achieve precise control of the pumped fluid.
Safety protection:
In some special application scenarios, such as preventing fluid backflow or idling of the pump, you can install a solenoid valve to achieve safety protection. For example, a check valve (which can also be regarded as a special solenoid valve) is installed at the outlet of the pump to prevent the fluid from flowing back into the pump.
3. Practical application cases
Liquid delivery system: In the chemical, pharmaceutical, food and other industries, it is often necessary to use pumps and solenoid valves to transport various liquids. By precisely controlling the opening and closing time of the solenoid valve, the precise adjustment and delivery of the liquid flow can be achieved.
Vacuum system: In the vacuum pump system, the solenoid valve can be used to control the vacuum circuit on and off. For example, in applications where rapid switching of vacuum pump exhaust ports is required, multiple solenoid valve combinations can be used to achieve gas path switching and control.
4. Precautions
When selecting solenoid valves and pumps, it is necessary to fully consider whether their technical parameters and performance indicators meet the actual needs.
During installation and use, you must follow the relevant operation rules and safety regulations to ensure the normal running of the device and the safety of personnel.