Rubber Reducer

Rubber Reducer

Rubber Reducer (Concentric Rubber Expansion Joint)
The rubber reducer, also known as a concentric rubber expansion joint, is specially designed to connect pipes of different diameters while maintaining a smooth axial flow. It effectively absorbs vibration, reduces noise, and compensates for pipeline misalignment or movement caused by pressure or temperature changes.

Manufactured using high-quality EPDM, NBR, or Neoprene rubber with reinforced nylon or steel wire layers, this joint offers outstanding durability, corrosion resistance, and pressure tolerance. It is ideal for HVAC systems, chemical pipelines, wastewater treatment, and industrial fluid transfer applications where space is limited or smooth diameter transitions are required.

Compatible with ANSI, DIN, or JIS flange standards, the rubber reducer is easy to install, leak-proof, and suitable for both indoor and outdoor environments. Zhengda Valve provides custom sizes and configurations to meet project-specific requirements.

Key Features

• Smooth pipe size transition while maintaining axial alignment
•Excellent vibration and noise reduction performance
•Reinforced rubber body with high tensile strength and pressure resistance
•Suitable for connecting different pipe diameters in confined spaces
•Available in EPDM, NBR, Neoprene for water, oil, and chemical applications
•Compatible with ANSI, DIN, and JIS standard flanges
•Corrosion-resistant, aging-resistant, and long service life
•Easy to install, maintain, and replace

Technical Specifications

Nominal Diameter (DN)InchLength (L) mmFlange Thickness (b) mmBolt Qty (n)Bolt Hole Dia. mmBolt Circle Dia. (D1) mmAxial Extension mmLateral Displacement mmAngular Deflection (°)
DN32×251¼”×1″9516418100699
DN40×321½”×1¼”95184181106109
DN50×402″×1½”1051841812571010
DN65×502½”×2″1152041814571311
DN80×653″×2½”1352041816081512
DN100×804″×3″15022818180101913
DN125×1005″×4″16524818210121913
DN150×1256″×5″18024823240122014
DN200×1508″×6″21024823295162214
DN250×20010″×8″230261223350162514
DN300×25012″×10″24528122340016

Why Choose Our Rubber Expansion Joints

•Proven Quality
Our products are made from high-quality rubber and steel materials, tested for durability and long-term service under harsh industrial conditions.
•Global Standards
Manufactured in compliance with DIN, ANSI, JIS standards. Compatible with global piping systems.
•Custom Solutions
Available in multiple sizes and materials (EPDM, NBR, FKM) to meet various media and working conditions.
•Factory Direct Supply
Competitive pricing with fast delivery from our own manufacturing facility.
•Trusted by Clients Worldwide
Exported to Southeast Asia, the Middle East, Europe, and other regions with excellent client satisfaction.

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