Double Sphere Rubber Joint

The inner wall of the products is in form of smooth plane cylinder, and lined with polyester cord fabrics. The outside protruding part is wire rope support ring, its inner rubbers are various medium resistance rubbers and outer rubbers are normal rubber.

Their main functions are to prevent flatness under negative pressure and to endure short time inner pressure, to avoid vibrating of inlet pipes bottom ends caused by pump power and suction vibrating so as to make the flow evenly raised and the pump power consumption reduced. Besides, because the inner walls of the rubber joint are vertical with no fillisters (arching, also called big belly), it prevents swirls caused by the suction of the pump, which improves the pumps efficiency.

The inner wall of the product is very smooth for water. The outside is wire rope supporting.

Double Sphere Rubber Joint Installation Directions

1. During pipe construction, the flexible rubber joint shall be kept natural, do not deform the product purposely when installing.
2. During installing flange losing rubber joint, the enhancing ring(jutted inner steel wire rope)of spherical two ends shall be completely installed inside the flange slot so as to prevent balls to break away from flanges when pipes bear pressure.
3. During installing bolts, screw down sym-metric six/four bolts and keep balls and flanges remaining in order.
4. When connecting rubber joint and pipe flange, the bolt pole shall extend to the pipe flange so as to prevent from crushing or pricking the coved screw thread expanding because of pressure, all bolts shall be pressured and screwed down and word congruously. If the surrounding circumstance is bad, spring washer and flat gasket shall be added to prevent bolts from losing.

If arch/high arc rubber joints are adapted(for six-angle bolt cannot pass through flange hole), double-head bolts shall be used and try to reduce spherical screw thread jut and avoid crushing balls expanding under pressure and prevent early damage of rubber.

When frequently use the rubber joint or near water(oil)pup nozzles, stop block shall be added on both ends of flans so as to reduce the impace on pump and pipe caused by the length changes of rubber joint.

When adapting over Dn1000 © Lrubber joint, some length short pipe shall be made on one flange end so as to help installation and reduce labor strength. After connecting rubber joint and the short pipe and the other pipe, weld the short pipe and relevant pipe together.

In order to remove the radial deviation formed by short pipe welding, use round steel or other relevant metal to temporarily weld flanges on pipes two ends and make the rubber joint and flange be a steel body. After welding, remove the welding again and keep the rubber joint natural as usual.

When welding metal and flange, remember to cover the rubber joint with shielding and prevent from burning balls.