Product Overview
The DN400 PN25 Hand-Built Rubber Compensator (300mm Length) is a premium, custom-engineered solution for high-pressure, abrasive fluid handling. Unlike mass-produced molded joints, this unit is hand-built using multiple layers of high-tensile tire cord reinforcement, allowing it to safely sustain 2.5 MPa (PN25) working pressure while maintaining exceptional flexibility.
The core technology lies in its Integrated Vulcanized Full Face Sealing. The thick, wear-resistant Natural Rubber (NR) lining is vulcanized directly onto the carbon steel flange faces during the curing process. This creates a monolithic structure that eliminates the risk of rubber “pull-out” or flange-face leaks, making it the definitive choice for critical slurry and dredging pipelines.
Key Features
- Hand-Built Custom Construction: Multi-layer reinforcement allows for a robust carcass that exceeds standard molded pressure ratings (PN25/25 bar).
- Abrasive-Resistant Natural Rubber: Specifically formulated NR lining provides superior longevity against sand, slurry, and mining tailings.
- Integrated Vulcanized Sealing: The rubber and flange faces are bonded as one unit, preventing bimetallic corrosion and ensuring an airtight seal without extra gaskets.
- Heavy-Duty Control Units (Limit Rods): Essential for PN25/DN400 systems to manage massive thrust forces and prevent over-extension.
- 300mm Standard/Custom Length: Optimized 300mm face-to-face dimension for easy retrofit in existing large-bore pumping stations.
Applications
- Mining & Tailings Pipelines: Transporting abrasive slurries under high pressure.
- Dredging & Sand Suction: Flexible links for main discharge lines on dredger vessels.
- Power Plant Ash Handling: Managing high-velocity bottom ash and fly ash slurries.
- Heavy Industrial Pumping: High-pressure vibration isolation for large-diameter centrifugal pumps.
FAQ
Q: Why is “Hand-Built Vulcanized Full Face Sealing” superior to standard molded rubber joints for PN25 DN400 applications?
A: At large diameters (DN400) and high pressures (PN25), standard molded joints often suffer from “flange-face creep” where the rubber sealing ridge can be pushed inward under pressure. Our Hand-Built process allows for much thicker reinforcement layers, and by vulcanizing the rubber directly to the flange, we create a permanent chemical bond. This means the sealing surface cannot shift or delaminate, even under extreme vacuum or 25-bar positive pressure. It provides a safer, more durable connection for abrasive media where traditional gaskets would fail or erode.
