Diaphragm solenoid valve for water and non-aggressive liquids. Normally closed (NC) – opening occurs when current is applied to the coil. It is used to open and close the flow of the working medium. Body and cover made of CW 617N brass, spindle and spring made of AISI 303 stainless steel, diaphragm: NBR. Coil supply voltage to choose from – 230V or 24V.