Full Wrap Rubber Expansion Joint
A Full Wrap Rubber Expansion Joint delivers maximum protection and flexibility in demanding piping systems where movement, vibration, and abrasion are constant concerns. This design features a seamless rubber body that fully encapsulates internal reinforcement layers, providing superior resistance to external damage, moisture ingress, and chemical attack. In contrast to standard single-arch joints, the full wrap construction eliminates weak points at flanges and arch transitions, making it ideal for slurries, aggressive media, and high-cycle applications. For installations needing an even more robust barrier, our Totally Encapsulated Rubber Flexible Joint takes that concept further with a continuous rubber lining that completely envelops the entire metal flange face, ensuring zero metal exposure to the process fluid. The full wrap design effectively absorbs multidirectional movement, reduces noise, and compensates for minor misalignments, which dramatically extends equipment lifespan and lowers maintenance costs across water treatment, power generation, HVAC, and industrial processing systems.
Engineered for reliability, the Full Wrap Rubber Expansion Joint combines advanced elastomer technology with precision-molded construction to handle temperatures from -40°F to 250°F and pressures up to 232 PSI, depending on the compound and reinforcement. Its integrated full-wrap cover protects against ozone, UV radiation, and mechanical abrasion, while the inner tube is available in EPDM, Neoprene, Nitrile, or Chlorobutyl to match specific chemical environments. The arch geometry is optimized for high movement absorption—axial compression, extension, lateral offset, and angular deflection—without transmitting excessive thrust loads to connected equipment. Built-in floating flanges rotate freely for easy bolt hole alignment during installation, and the entire joint is 100% factory-tested for pressure integrity. This design eliminates the need for external protection shields in many abrasive slurry applications, offering a cost-effective, low-maintenance alternative to metallic expansion joints.
Technical Specifications
- Nominal Diameter Range: DN 32 to DN 1200 (1-1/4” to 48”)
- Pressure Class: 150# and 300# drilling patterns available
- Working Pressure: Rated up to 16 bar (232 PSI) depending on size and reinforcement
- Vacuum Service: Full vacuum capability with retaining ring option
- Temperature Range: -40°F to 250°F (-40°C to 121°C) EPDM; wider with specialty elastomers
- Movement Capabilities: Up to 30 mm axial compression, 20 mm axial extension, 25 mm lateral, 30° angular (varies by size)
- Flange Standards: ANSI B16.5 Class 150/300, DIN PN10/16, JIS 10K/16K, and custom drillings
- Reinforcement: High-strength nylon or aramid tire cord, fully encapsulated
- Cover and Tube: Full-wrap EPDM, Neoprene, Nitrile, Chlorobutyl, Hypalon, or Viton
| Property | EPDM | Neoprene | Nitrile (NBR) | Chlorobutyl |
|---|---|---|---|---|
| Temperature Range | -40°F to 250°F | -20°F to 210°F | -20°F to 200°F | -30°F to 240°F |
| Abrasion Resistance | Excellent | Good | Good | Very Good |
| Ozone/UV Resistance | Excellent | Good | Fair | Excellent |
| Oil & Fuel Resistance | Poor | Fair | Excellent | Poor |
| Acid/Alkali Resistance | Very Good | Moderate | Moderate | Excellent |
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