... 2/2-way normally closed, 3/8", 3/4", 1", 1¼",1½",2" pipe size;2.Operating ... ;3.Orifice:16, 20, 25, 32, 40, 50;4.Fluid media: air ,water, oil, gas;5.Fluid temperature ... 110/220V, 50/60Hz, DC 12/24V7.Material of solenoid valve:Seals:NBR , VITON or EPDM, body: Forged brass ... 40, 50 only);8.Brass series solenoid valve with CE TUV, ISO9001 approvement. Normally Closed|Open 2 Way Brass Electric Solenoid Valve