End Face Fully Sealed Rubber Expansion Joint

The End Face Fully Sealed Rubber Expansion Joint (also known as fully sealed rubber flexible joint or zero-leakage vibration isolator) is a flexible pipeline connector with a flange end face integrally vulcanized with the rubber sphere. Different from ordinary rubber joints (where flange and sphere are separately assembled with seams at end faces), this product features a full-sealing end face without any seams or joints---the rubber and flange are completely fused into one.

Dafugui, located in Wenzhou, Zhejiang, adopts advanced integral vulcanization molding technology and strictly complies with GB/T 26121 standards. Sphere materials include NR, NBR, EPDM, CR, FKM, etc. Flange materials include Carbon Steel Q235 or Stainless Steel 304/316L. Suitable for -20℃～+250℃ temperature range, working pressure 0.25～2.5MPa.

End Face Fully Sealed, Zero Leakage

This is the core difference between the End Face Fully Sealed Rubber Expansion Joint and ordinary rubber joints. Ordinary rubber joints have separate flange and sphere assemblies with seams at the end faces, which may develop leakage after long-term use. This product adopts integral vulcanization molding, where the flange end face and rubber sphere are completely fused without any seams or joints---fundamentally eliminating the possibility of media leakage. Particularly suitable for high pressure, vacuum and corrosive media conditions.

Pressure and Vacuum Resistant, Stable Sealing Performance

The fully sealed structure not only prevents leakage but also provides excellent pressure and vacuum resistance. Ordinary rubber joints are prone to leakage at end face seams under high pressure or negative pressure fluctuations. The end face fully sealed design ensures stable sealing performance across the entire working pressure range (including vacuum conditions), without degradation under pressure variations.

Vibration Damping and Noise Reduction, Protecting Pipeline Equipment

Like ordinary rubber joints, the End Face Fully Sealed Rubber Expansion Joint also provides excellent vibration damping and noise reduction. The high-elasticity rubber sphere effectively absorbs vibration and impact in pipeline systems, reduces structure-borne noise, and protects pumps, valves and other equipment from vibration damage. Particularly suitable for pump rooms, air conditioning machine rooms and other areas with high vibration and noise control requirements.

Flexible Material Options for Various Media

FAQ

Q1: What is the difference between end face fully sealed rubber joints and ordinary rubber joints?

A: Ordinary rubber joints have separate flange and sphere assemblies with seams, posing leakage risk. End face fully sealed joints adopt integral vulcanization molding without seams or joints---fundamentally eliminating leakage. Particularly suitable for high pressure, vacuum and corrosive media.

Q2: Can it be used in vacuum systems?

A: Yes. The fully sealed design maintains stable sealing under negative pressure. The seamless structure effectively maintains vacuum.