Reversing ValveProduct Name: reversing valve Specification: DN15-DN150, 1"-6", larger size can be customized ... can be customized Materials: SUS304, SUS316,SUS316LSealing ring: silicon gel,EPDM or VITON(FPM)Surface treatment: mirror polishing,semi-polish,matt ... : DIN,SMS,3A,ISO,IDF,RJT,AS,BS,BPE Reversing Valve