Key Features at a Glance

1. Exceptional Vibration Isolation Performance
   The heavy-duty, high-density rubber matrix exploits elastomeric hysteresis to convert mechanical vibration waves from fans, blowers, and compressors into negligible thermal energy. Targets the critical 10Hz–100Hz frequency range, effectively isolating upstream rotating equipment from sensitive downstream inline instrumentation and ductwork structures.
2. Multi-Directional Movement Compensation
   Utilizing optimized arch profile design ratios, this joint concurrently accommodates axial compression up to 50mm, axial extension up to 25mm, lateral shear deflection, and angular rotation — all within a compact face-to-face installation dimension while keeping spring rates exceptionally low for minimal reaction loads on connected equipment.
3. Hand-Wrapped Artisan Structural Integrity
   Unlike low-cost mass-produced molded alternatives, each joint is manufactured using an artisan hand-wrapped process where multiple plies of high-tenacity synthetic tire cord fabric are bias-ply wrapped at optimized angles (45° to 54.7° alignment), yielding far superior burst pressure ratings and critical vacuum collapse resistance compared to molded equivalents.
4. Chemical & Thermal Degradation Resistance
   To counter aggressive acidic condensates such as sulfur oxides (SOx) and nitrogen oxides (NOx) present in flue gas streams, the inner liner can be formulated from Chlorobutyl or FKM (Viton) elastomer — ensuring polymer cross-linking remains intact without premature embrittlement or cracking even under prolonged acid exposure.
5. Zero Leakage Integral Full-Face Flange Design
   The vulcanized integral full-face rubber flanges eliminate all critical leakage pathways entirely through elastic deformation of the joint body itself against the mating pipe flange — removing any requirement for auxiliary gaskets and ensuring a 100% airtight seal in sensitive negative-pressure dust extraction and environmental control setups.
6. Massive Diameter Range (DN100 – DN4000 / 4″ – 160″)
   Available in an extraordinary size spectrum from small ventilation connectors at 100mm (4-inch) through massive power plant main duct joints at 4000mm (160-inch). Non-standard over-sized custom diameters available upon requisition for specialized project requirements beyond standard catalog sizes.
7. Wide Elastomer Material Portfolio
   Standard Chlorobutyl liner for superior thermal rating and gas impermeability. Optional materials include EPDM for hot air service, FKM/Viton for extreme chemical/acid resistance up to 204°C, Neoprene for general-purpose use, Nitrile for oil-laden air streams, and Hypalon (CSM) for outdoor weathering environments.
8. Vacuum Service Capability with Wire Helix Option
   For vacuum service applications requiring enhanced collapse resistance, an internal solid steel wire helix is integrated into the reinforcement core to prevent localized deformation or vacuum implosion while maintaining full flexibility for vibration isolation performance.

Core Technical Advantages

• Exceptional Vibration Isolation: The heavy-duty, high-density rubber matrix exploits elastomeric hysteresis properties to convert mechanical vibration wave energy from fans, blowers, and compressors into negligible thermal energy dissipation. This isolation system targets the most damaging 10Hz–100Hz frequency range commonly generated by rotating machinery, protecting sensitive downstream instrumentation and preventing fatigue damage to rigid ductwork supports.
• Multi-Directional Movement Compensation: Utilizing optimized arch profile design ratios with precisely calculated geometric parameters, each joint simultaneously accommodates axial compression movement up to 50mm, axial extension up to 25mm relative to nominal face-to-face length, lateral shear deflection, and angular rotation misalignment within a compact installed dimension — maintaining exceptionally low spring rates to minimize transmitted reaction forces.
• Hand-Wrapped Structural Integrity: Unlike low-cost mass-produced molded alternatives, every DEVEL round duct joint utilizes an artisan hand-wrapped manufacturing process where multiple plies of high-tenacity synthetic tire cord fabric are bias-ply wrapped at mathematically optimized angles ranging from 45° to 54.7° alignment — yielding far superior burst pressure ratings and critical vacuum collapse resistance compared to conventional molded products.
• Chemical & Thermal Degradation Resistance: To counter aggressive acidic condensates including sulfur oxides (SOx) and nitrogen oxides (NOx) continuously present in industrial flue gas streams, the inner liner compound can be formulated from Chlorobutyl or FKM (Viton) fluoroelastomer — ensuring the polymer cross-linking network remains chemically intact without premature embrittlement, hardening, or surface cracking over extended service life.
• Zero Leakage Integral Full-Face Flange: The fully vulcanized integral full-face rubber flanges completely eliminate all critical leakage pathways that exist with conventional loose-gasket designs. Sealing is achieved solely via controlled elastic deformation of the joint body itself against the mating pipe flange face — removing any requirement for auxiliary gaskets and guaranteeing a 100% airtight seal in sensitive negative-pressure dust extraction and environmental emission control installations.

Materials & Construction Specification

Technical Parameters

Engineering Best Practices: Installation & Maintenance

1. Torque Sequence Protocol: Mating bolts must be tightened using an incremental star (cross-diagonal) pattern. Tighten in 3 to 4 sequential stages to ensure even compression across the entire elastomeric face-to-face flange area. Excessive unilateral tightening will cause flange damage or structural seating leaks.
2. Control Rods Integration: It is highly recommended to install limit/control rods on pipeline segments subjected to unexpected or uncontrolled thrust forces to prevent over-extension beyond the 25mm design threshold. Control rods protect both the flexible connector and adjacent equipment from displacement-induced failure.
3. Weld Splatter Safeguards: If field welding operations occur adjacent to the flexible connector, the rubber body must be completely insulated using certified high-temperature welding blankets. Direct slag contact will compromise the cross-linked outer cover rubber matrix and void warranty coverage.

Primary Industrial Sectors

Product Tags

Request a Custom Quote for Your Project

Factory-direct pricing available. DEVEL engineering team ready to assist with material selection, sizing calculations, and installation guidance.

Contact DEVEL Team