Key points of solenoid valve selection:
1) The main control parameters of solenoid valve are diameter, design nominal pressure, allowable temperature range of medium, interface size, etc.
2) Solenoid valve is used to push the opening and closing of the valve with electromagnet. It is usually used in two position control with diameter less than 40mm, especially for connecting, cutting off or changing gas and liquid circuits.
3) The sealing performance of valves is one of the main indexes to evaluate the quality of valves. The sealing performance of the valve mainly includes two aspects: internal leakage and external leakage.
Internal leakage refers to the sealing degree of the medium between the valve seat and the closing part. External leakage refers to the leakage of valve stem packing, the leakage of middle port gasket and the leakage of valve body caused by casting defects. Leakage is not allowed.
4) The main advantages of solenoid valve are small volume, reliable action, convenient maintenance and low price. During selection, attention shall be paid to the selection of normally open or normally closed type according to the process requirements.
