5 Inch DN125 Single Sphere Flexible Rubber Expansion Joint | EPDM Rubber Bellow with Carbon Steel Flange
Product Overview
The 5 Inch DN125 Single Sphere Flexible Rubber Expansion Joint is a high-quality pipeline compensator designed to absorb vibration, reduce noise, and compensate for thermal expansion and contraction in piping systems. Made with durable EPDM rubber and galvanized carbon steel flanges, it offers excellent flexibility and long-term reliability in both industrial and water system applications.
This joint is ideal for HVAC systems, water supply, wastewater treatment, chemical pipelines, and general industrial piping.
Key Features & Advantages
High Flexibility & Vibration Absorption
The single sphere structure allows for maximum compression, elongation, and angular deflection. It efficiently reduces mechanical vibration and noise transmission, extending the lifespan of connected equipment.
Premium EPDM Material
Manufactured from EPDM rubber, this joint provides superior resistance to high temperature, ozone, and aging. It also performs well in both hot and cold water applications, as well as weak acids or alkalis.
Strong & Corrosion-Resistant Flanges
Equipped with carbon steel galvanized flanges, ensuring firm connection, excellent sealing, and long-lasting corrosion protection even in harsh environments.
Compact Structure, Easy Installation
Its compact size and light weight make installation quick and simple, saving both space and labor costs during pipeline assembly.
Effective Pressure Resistance
Designed for ANSI 150LB / PN16 pressure ratings, the joint maintains safe operation under high pressure while compensating for pipe misalignment and movement.
| NO | Product name | Material |
| 1 | Tube | EPDM |
| 2 | Reinforcing fabric | Nylon |
| 3 | Ring | Steel wire rope |
| 4 | Flange | Carbon steel |
Product Benefits Summary
Noise and vibration reduction for smooth operation
Compensation for thermal expansion and pipeline movement
High sealing performance preventing leakage
Maintenance-free and long-lasting under normal use
Customizable flange standards to fit global requirements
Typical Applications
✅ HVAC and chill water systems
✅ Water treatment plants and pump rooms
✅ Industrial pipelines for air, oil, and chemicals
✅ Firefighting and drainage systems
✅ Marine and shipbuilding pipelines
Our factory
Why Choose Us
As a professional manufacturer of rubber expansion joints, we focus on quality, precision, and performance. Every joint undergoes strict pressure and sealing tests before delivery. We support OEM & ODM services, custom labeling, and global shipping to meet your project needs.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.