As an automatic basic component for controlling fluid, solenoid valve is widely used in industrial and civil fields. However, it also has some disadvantages, mainly including the following aspects:
1. Limited adjustment accuracy
Reason: The solenoid valve usually has only two states of switch, and the spool can only be in two limit positions, and continuous adjustment cannot be achieved. Although some new solenoid valves can achieve multi-position control or analog control, these technologies are still in the trial stage, so the adjustment accuracy is limited.
2. Limited flow medium
High cleanliness of the medium: the solenoid valve has high requirements for the cleanliness of the medium, and the medium containing particles cannot be applied, such as the medium contains impurities, which need to be filtered first.
Narrow range of medium viscosity: The medium viscosity range suitable for a specific product is relatively narrow, and viscous media may not be suitable.
3. High energy consumption
Reason: Solenoid valves need to consume electrical energy to generate a magnetic field to control the switch of the valve, so it may cause high energy consumption in long-term operation.
4. The response speed is relatively slow
Relative to some other types of valves, the response speed of the solenoid valve may be slower, depending on the response time of the electromagnet and the performance of the power supply.
5. Low level of protection
Structure impact: The solenoid valve structure is relatively simple, easy to be affected by external dust, air, temperature and other factors. In specific environments, such as high humidity, dripping rain or frequent vibration, bumps and shocks, it may be necessary to select a special type of solenoid valve (such as waterproof solenoid valve, Marine solenoid valve) to meet the needs.
6. High requirements for power supply
Power supply stability: The solenoid valve needs to match the appropriate power supply, and there are certain requirements for the stability and voltage range of the power supply, otherwise it may affect its normal working performance.
7. High cost
Relative cost: Relative to some mechanical valves or other control elements, the cost of solenoid valves can be high, especially in high-flow or high-pressure applications.