2/2 way normally closed solenoid valve, diaphragm type 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, clothing equipment, drying equipment, pharmaceutical, HVAC air conditioning, electroplating machinery manufacturing industries. Automatic control of water, hot water and gas.