... /4"--120")Rubber material: EPDM,NBR, NRRubber sphere: Single sphere, Double sphere Flange: ANSI B16.5, DIN2501, BS4504 Flange material: Carbon ... /cm2)3.0(30)4.8(48)5.5(55)Vacuum KPa(mmHg)53.3(400)86.7(650)100(750 ... Mediawater,sea water,hot water,oil,acid,alkali etc EPDM double sphere rubber expansion bellow joint