... connection 3, ISO9001 and CE certificate 4, do OEM limit rubber joint flangedSpecification:1, DN32-DN30002, Flange connection3, standard: Flanged DIN/PN ... /Perbunan, Hypalon/CSM, Chloro-Butyl/IIR, Natural Rubber, Neoprene/Chloroprene, SBR/Buna-S, Gum Rubber,HNBR, ECO/Epichlorohydrin5, PTFE Lined or Viton ...