Double Sphere Rubber Joint1
Double Sphere Rubber Joint2
Double Sphere Rubber Joint3
Double Sphere Rubber Joint4

Double Sphere Rubber Joint

Size Range: DN40-600

Pressure: PN10/PN16

Body Materials: EPDM

Flanged Materials: Carbon Steel Q235 with Epoxy Coating


Applicable pressure:PN10/PN16
Applicable temperature: 0℃ ~120℃ 
Suitable medium :Water
Body material:EPDM
Application fields:  Municipal construction, water conservancy project, water supply and drainage, water treatment etc, water chiller system, HVAC and mechanical.

Product advantages:
1. The flange is forged with JB / T 81-94 standard. No difference.
2. The rubber sphere is made of EPDM rubber. And the rubber content is more than 40%. It has the characteristics of tensile resistance, compression resistance, aging resistance, high temperature resistance and low temperature resistance.
3. It has a compression ring made of carbon steel. A steel cord is wound around the ball cord to increase the ball strength.
4. It has limit bolts to prevent the ball from pulling off.
5. Each product will be inspected for sphere appearance, hardness, air tightness, pressure resistance and flange pull-out prevention before leaving the factory. Unqualified products are strictly not allowed to leave the factory.
6. The flange is spray-treated. Spray thickness is greater than 250um, which can reduce the rust generated in humid environment by more than 70% and improve the anti-oxidation rate by more than 20%
7.Bundor brand products are underwritten by Pacific Insurance Company with a quality of 10 million yuan. The warranty is 2 years.Pay two back if one bad. We will compensate unconditionally for problems caused by the quality of the product itself.



Executive Standard
Name Design and manufacture Face to face Length Pressure Test End flange    
Reference standard GB/T26121 GB/T26121 GB/T26121 GB/T9116;ANSI B16.5;DIN EN 1092-1;JIS B2220    
Material of Main Parts
Name Rubber Ball Flange        
Material EPDM Carbon Steel Q235 with Epoxy Coating        
Optional NBR/Silicone/PTFE lined EPDM 304/304L/316/316L        
size   pn10 PN16
DN NPS(Inch) L ΦK N-Φd ΦK N-Φd
DN50 2" 165 125 4-Φ18 125 4-Φ18
DN65 2.5" 175 145 4-Φ18 145 4-Φ18
DN80 3" 175 160 8-Φ18 160 8-Φ18
DN100 4" 225 180 8-Φ18 180 8-Φ18
DN125 5" 225 210 8-Φ18 210 8-Φ18
DN150 6" 225 240 8-Φ22 240 8-Φ22
DN200 8" 325 295 8-Φ22 295 12-Φ22
DN250 10" 325 350 12-Φ22 355 12-Φ26
DN300 12" 325 400 12-Φ22 410 12-Φ26


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