Solenoid Valve-Normally Closed Type PRODUCT DESCRIPTION ．UW series is direct, multiplex, connected diaphragm, conductive and normally closed (NC) 2/2 way solenoid valve. ．Able to be operated directly under low pressure ．Availability of fluid type：water, air, light oil ．Acceptable for customization Viton (130℃) , Silicone (130℃) and EPDM (130℃)