DN200 8'' EPDM Single Axial Rubber Ball

DN200 8''
The DN200 8" EPDM Single Axial Rubber Ball is a single-sphere rubber expansion joint designed for vibration isolation, noise reduction, and displacement compensation in piping systems. It features a DN200 (8") bore and an EPDM (ethylene propylene diene monomer) rubber body.
Delivery
FOB
minimum order
5 pieces
Supply Ability
100pieces / Month
Country of Origin
CHINA
Stock Time
30Day
Quantity:
US $1.00 - US $100.00 / pieces
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Key Specifications

  • Nominal bore: DN200 / 8"

  • Body material: EPDM rubber — excellent resistance to weathering, aging, acids, alkalis, and hot water

  • Face-to-face length: Typically 210 mm (varies slightly by standard)

  • Pressure rating: Commonly PN10 / PN16 (1.0–1.6 MPa)

  • Temperature range: Approx. -10 °C to +100 °C (standard EPDM range; some manufacturers rate up to 115 °C or 150 °C)

  • Movement capability (reference): Axial compression approx. 20–25 mm, axial extension approx. 12–16 mm, lateral movement approx. 22 mm, angular deflection approx. 15°

Construction & Performance

  • Construction: Inner rubber layer, multiple plies of nylon fabric reinforcement, steel wire reinforcing rings, and an outer rubber cover, with flanged ends (typically galvanized carbon steel or stainless steel).

  • Function: The rubber's high elasticity absorbs axial extension/compression, lateral displacement, and angular deflection in the pipeline, preventing stress damage caused by thermal expansion/contraction or foundation settlement.

  • Vibration & noise control: Effectively isolates vibration transmitted from pumps, compressors, and other equipment to the piping, reducing structural noise.

Suitable Media & Applications

  • Media: Hot water, cold water, seawater, sewage, weak acids/alkalis, and compressed air. Note: EPDM is not oil-resistant — do not use with petroleum or mineral oil media (use NBR for oil service).

  • Typical applications: Water supply and drainage, HVAC, fire protection systems, circulating water pipelines, and industrial piping in power plants and chemical plants. Particularly suitable for pump suction/discharge connections as a flexible coupling.

Installation Notes

  • Do not exceed rated movement: Never exceed the product's maximum rated displacement during installation. Do not weld or cut on the joint.

  • Support & restraint: For suspended or high-pressure lines (especially large-diameter DN200), fixed supports or restraint devices (tie rods) must be installed to prevent excessive elongation of the joint under internal pressure.