... (UW), 2W(UD)series 2 port solenoid valve: 2W(UW), 2W(UD)series* 2W(UW) series solenoid valve, larger port type, use for air ... : Brass(stainless steel option). Seal material: NBR(VITON option). * Direct diaphragm action, normally closed(normally open option), 2 port 2 position ... ", 1-1/4", 1-1/2", 2".* 2W(UD) series solenoid valve, use for air, water, oil, gas. * Body material: Brass(stainless ...