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Double Sphere Rubber Expansion Joint

Double Sphere Flexible Rubber Joint is designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for offset and to protect rotating mechanical equipment against start-up surge forces. Widely used in chemical industry, construction, water supply, drainage, petroleum, refrigeration, sanitation, fire protection, power projects. 

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Scope and Option :

Size: NPS 1/2"~160" DN15~DN3600                            
Pressure Rating: PN2.5 PN6 PN10 PN16 PN25 PN40 , Class125 150 300                
Connection: Flaged,utt weld,Socket weld(RF, BW, RTJ,SW and so on)
Flagne Material: Iron Carbon steel,Stainless steel, Alloy, Duplex (CS, SS, ALLOY and so on)
Rubber: Natural rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene propylene terpolymer, chloroprene rubber, silicone rubber, fluorine rubber and so on
Connetion: Loose sleeve Flange,  Fixed flange , Thread,  
Flange standard: DIN EN API ANSI AWWA GOST GB 
Type:  Concentric diameter Rubber Joint, concentric diameter Expansion RubberJoint and Eccentric diameter Expansion Joint
Ball Qty: Single sphere, Double sphere, Three Sphere, Multi sphere rubber joint
Expansion Joint Auxiliary Part: with control rod, or other requirement

Design feature:
The rubber parts consist of inner and outer rubber, cord layer and traveler, which are vulcanized and then combined with metal flanges or loose sleeves of parallel joints. This Joint can reduce vibration and noise, and compensate thermal expansion and contraction caused by temperature change. It is widely used in various pipeline systems. According to different materials, They have the functions of heat resistance, acid resistance, alkali resistance, corrosion resistance, wear resistance, aging and oil resistance.

SGV double sphere rubber expansion joints are inherently stronger than the conventional hand-built style spool arch type. Internal pressure within a “sphere” is exerted in all directions, distributing forces evenly over a larger area. The spherical design “flowing arch” reduces turbulence and sediment buildup.

Absorbs Directional Movement
Thermal movements appear in any rigid pipe system due to temperature changes. Double ball rubber expansion joints  allow for axial compression or axial extension, lateral deflection as well as angular movement.

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