Double Sphere Flexible Rubber Joints, the connection is two flanges and double spheres. Connect with the pipeline through the flanges.The dimensions of flange are equal type both end. And the material of sphere is NBR or EPDM or as requirements.Flanged Rubber Joints widely used in chemical, construction, water supply, drainage, petroleum, light industry, freezing, sanitation, plumbing, fire protection, electric power and other basic engineering due to its good comprehensive performance.They adapt to a variety of media and the environment. Operating Conditions : Operating Pressure:PN10PN16 Explosive Pressure:3.04.5Mpa Vacuum Rating:400650750 mmHg Temperature : EPDM:-10to 120 ;NBR:-10to 82;Neoprene:-10to 110 Medium :Air, Water, Sea Water, Hot Water, Oil, Acid, Alkali.