1. Working life, this item is not included in the factory test items, it is a type test item. In order to ensure the quality, we should choose famous brand products from regular manufacturers.
2. Work system: There are three types of long-term work system, repeated short-term work system and short-term work system. For long-term valve opening and only short-term closing, a normally open solenoid valve should be used.
3. Working frequency: When the operating frequency is high, the structure should be a direct-acting solenoid valve, and the power supply should be AC.
Strictly speaking, this test has not been formally included in China's professional standards for solenoid valves. In order to ensure the quality, it should choose the famous brand products of regular manufacturers. In some occasions, the number of actions is not high, but the reliability requirements are very high, such as fire protection, emergency protection, etc., must not be taken lightly. It is especially important to take two insurances in combination.