2/2 way normally closed solenoid valve, direct acting solenoid valve, gas general solenoid valve, solenoid valve, copper, bonavalve solenoid valve used in medical equipment, solar energy, cleaning equipment, food machinery, welding and cutting, fire safety, bio pharmaceuticals, medical equipment, rubber machinery, water reuse, environmental protection equipment, water supply and water supply clothing, equipment, drying equipment, pharmaceutical, HVAC, electroplating machinery manufacturing industries. Automatic control of water, hot water and gas.