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.

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.

The company adheres to the business philosophy of "customer satisfaction is our first duty, all employees are responsible for creating quality, continuous improvement sets new heights, honest service builds reputation", and wholeheartedly provides high-quality products and professional services to new and old customers.

The factory mainly produces rubber expansion joints, duckbill check valves, dismantling joint, bellow expansion joints, compensators, repair clamp, 02S404 national standard waterproof casings, gate valves ,butterfly valves etc; and all products have passed ISO 9001:2015 quality management system certification; adopting national and industry standards, advanced manufacturing technology, strong R&D and manufacturing capabilities, they are widely used in water supply, drainage, electricity, chemical industry, gas, metallurgy, urban construction and environmental protection and other pipeline industries.