Product Overview
The DN40 PN25 Double Arch Custom Flexible Joint is engineered to meet the rigorous demands of marine piping systems where high pressure and significant thermal movement coexist. Featuring a 150mm face-to-face length, this double arch rubber expansion joint provides superior multi-axial flexibility compared to single-sphere models, making it ideal for engine room vibrations and hull stress.
Our hand-built (hand-layered) manufacturing process ensures each unit is 100% custom-to-drawing, allowing for precise reinforcement layering to handle a 25 Bar (PN25) working pressure. The Full Face Sealing design ensures the EPDM carcass extends to the outer edge of the SS304 flanges, eliminating the need for additional gaskets and preventing galvanic corrosion in saline marine environments.
Key Features
- Double Arch Flexibility: The twin-sphere geometry allows for greater axial compression, extension, and lateral deflection within a compact 150mm space.
- PN25 High-Pressure Rating: Specifically reinforced through our manual winding process to withstand 2.5MPa surges common in marine cooling and ballast systems.
- Full Face Sealing Design: Integrated rubber flange faces provide a superior leak-proof seal against SS304 mate flanges, critical for preventing seawater leakage.
- Custom-to-Drawing Capability: We specialize in non-standard configurations. Whether you need a specific offshore flange drilling or a modified arch height, we build exactly to your technical blueprints.
- Marine-Grade SS304 Flanges: Provides excellent durability and corrosion resistance for internal shipboard applications.
Applications
- Shipboard Cooling Systems: Absorbing pump vibration in high-pressure seawater circulation.
- Ballast Water Treatment (BWTS): Flexible connections in tight engine room layouts requiring custom lengths.
- Marine Fire-Fighting Mains: Ensuring system integrity under 25-bar pressure during emergency operations.
- Auxiliary Engine Piping: Compensating for thermal growth in shipboard auxiliary systems.
FAQ
Q: Why specify a “Full Face” hand-built custom flexible joint for PN25 marine applications?
A: For marine engineers, system integrity at 25 Bar is non-negotiable. Our hand-built rubber expansion joint offers distinct advantages over molded alternatives:
- Elimination of Leak Paths: The Full Face Sealing design means the EPDM elastomer covers the entire flange face. This creates a massive sealing surface that absorbs flange misalignment better than standard ring-type joints, which is vital in the high-vibration environment of a ship’s engine room.
- Reinforcement Density: Standard molded joints often struggle with PN25 ratings. Our custom-to-drawing hand-built process allows us to wrap additional layers of high-tenacity aramid or polyester cord specifically at the arch base to prevent “ballooning” under 2.5MPa pressure.
- Zero-Stress Installation: Marine piping is often repaired in-situ with fixed dimensions. By building to your exact 150mm requirement (or any custom length), we ensure the joint is installed in a neutral state, significantly extending its service life compared to a “stretched” off-the-shelf part.
DN40 PN25 Double Arch Custom Flexible Joint - Full Face Sealing EPDM with SS304 Flanges
High-pressure PN25 custom flexible joint for marine piping systems. Featuring a 150mm double arch hand-built EPDM design and SS304 full face flanges. 100% custom-to-drawing for extreme vessel vibration.
Product In-Stock: InStock
