... "--120")Rubber material: EPDM,NBR, NRRubber sphere: Single sphere, Double sphere Flange: ANSI B16.5, DIN2501, BS4504 Flange material: ... .NameMaterial1Outer/inner rubberNR,EPDM,NBR2Key frameNylon cord fabric3Pressurized ringSteel Wire Strand4FlangeQ235Technical Conditions TypeIIIIIIWork pressure MPa(Kgf/cm2)1(10)1 ... water,hot water,oil,acid,alkali etc EPDM double sphere rubber expansion bellow joint