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.
