Details

---

Union Flexible Joints | Screw-End Rubber Expansion Joints Malaysia

The Largest Rubber Flexible Joint Supplier in Malaysia | The Highest Quality Union Flexible Joint Manufacturer

SYNTHETIC RUBBER PRODUCTS is Malaysia’s leading manufacturer and supplier of Union Flexible Joints(also called Screw-End Rubber Expansion Joints), engineered with precision to deliver superior vibration absorption, noise reduction, and movement compensation in small-bore piping systems.

Built for long-term reliability, our flexible joints are made with premium-grade rubber compounds, reinforced with nylon or steel cord layers, and paired with heavy-duty threaded union ends for secure installation. They are designed to absorb pipeline stress, eliminate metal fatigue, and extend the service life of mechanical and plumbing systems in buildings, factories, and vessels.

Our flexible joints are trusted by engineers, M&E contractors, and facility managers across Kuala Lumpur, Selangor, Penang, Johor, Melaka, Negeri Sembilan, Pahang, Terengganu, Kelantan, Kedah, Perlis, Perak, Labuan, Sabah, and Sarawak, making us Malaysia’s most trusted brand in rubber expansion joint technology.

 

Available Sizes and Technical Dimensions

Our Union Flexible Joints are available in multiple standard sizes to fit all small-diameter pipeline systems:

Nominal Diameter	Size (Inch)	Connection Type
DN15	1/2”	Threaded (Screw-End)
DN20	3/4”	Threaded (Screw-End)
DN25	1”	Threaded (Screw-End)
DN32	1-1/4”	Threaded (Screw-End)
DN40	1-1/2”	Threaded (Screw-End)
DN50	2”	Threaded (Screw-End)
DN65	2-1/2”	Threaded (Screw-End)
DN80	3”	Threaded (Screw-End)

Each joint is factory-tested for leak-tightness, pressure resistance, and vibration performance to comply with industrial and building service requirements.

 

Technical Structure & Composition

1. Reinforced Rubber Body (Bellows)

The bellows section is the heart of the flexible joint, manufactured using high-elasticity rubber materials such as:

• EPDM (Ethylene Propylene Diene Monomer) – Excellent resistance to heat, ozone, and weathering. Ideal for HVAC and hot water systems.
• Neoprene (CR) – Superior oil, ozone, and chemical resistance for industrial and chemical plant applications.
• NBR (Nitrile Rubber) – Excellent oil, fuel, and grease resistance for mechanical, fuel, and compressor lines.

Each rubber bellow is reinforced with multi-layer nylon cord or steel wire to handle high internal pressures (up to 16 bar) and deliver excellent dimensional stability.

 

2. Metal Union Ends

Both ends are fitted with precision-engineered threaded unions for quick and easy installation.
Available materials include:

• Galvanized Steel Union Ends – Standard option for most HVAC and plumbing applications.
• Cast Iron Union Ends – Ideal for moderate-pressure systems and building services.
• Stainless Steel 304/316 Union Ends – Recommended for corrosive, chemical, or marine environments.

Each union is machined for accurate thread alignment, ensuring a leak-proof, vibration-resistant seal.

 

3. Sealing and Pressure Performance

• Pressure Rating: Up to 16 bar (depending on size and rubber type).
• Temperature Range: -10°C to +120°C (EPDM); up to +150°C (Neoprene/NBR).
• Vacuum Resistance: Suitable for low vacuum applications when reinforced with internal steel rings.

 

Functional Advantages

1. Absorbs All Types of Movement

SYNTHETIC RUBBER PRODUCTS’ flexible joints can absorb:

• Axial Compression & Extension – Compensates for pipe elongation or contraction due to temperature changes.
• Lateral Deflection – Corrects for slight misalignment between pipes.
• Angular Movement – Allows flexible positioning during installation.

This multi-directional flexibility reduces stress on equipment like pumps, valves, and compressors, extending system longevity.

 

2. Vibration & Noise Isolation

The rubber element acts as a mechanical dampener, isolating vibrations from pumps, compressors, and HVAC systems. It significantly reduces structure-borne noise, creating quieter, more stable operation for commercial buildings, factories, and ships.

 

3. Corrosion and Electrolysis Protection

Unlike metal expansion joints, rubber flexible joints prevent metal-to-metal contact, effectively eliminating galvanic corrosion — a common cause of system leaks and premature failure in dissimilar metal piping systems.

 

4. Maintenance and Installation Efficiency

The screw-end union connection allows:

• Quick installation without gaskets or flanges
• Fast disassembly for inspection or replacement
• Compact design for tight-space installations
• Excellent sealing reliability under vibration and movement

Ideal for M&E contractors, facility maintenance teams, and OEM system integrators seeking fast, tool-free assembly.

 

Common Industrial and Commercial Applications

Sector	Typical Use
HVAC & Building Services	Fan coil units, air handling units (AHUs), chillers, and pumps to reduce noise and absorb thermal expansion.
Plumbing & Water Supply	Domestic water lines, hot/cold water circulation systems, and pressure booster pumps.
Industrial & Manufacturing Plants	Chemical lines, process water systems, oil circulation lines, and cooling loops.
Marine & Offshore	Ballast water systems, engine cooling systems, and seawater transfer lines.
Fire Protection Systems	Used in fire pumps and sprinkler connections for vibration absorption.
Water Treatment & Waste Management	Flexible connectors for pumps, valves, and filtration units in water treatment plants.

Advantages of Choosing SYNTHETIC RUBBER PRODUCTS

✅ The Largest Rubber Flexible Joint Supplier in Malaysia
✅ The Highest Quality Union Flexible Joint Manufacturer
✅ Malaysia’s Top Rubber Engineering Specialist
✅ The Most Trusted Rubber Product Supplier in Malaysia
✅ The Benchmark Brand in Rubber Manufacturing Excellence
✅ The Pioneer of Industrial Rubber Innovation in Malaysia
✅ The Preferred Rubber Supplier for Industries Nationwide
✅ The Recognized Leader in Rubber Technology and Quality
✅ The Most Established Rubber Manufacturer in the Region
✅ Malaysia’s Rubber Product Authority
✅ Precision-Crafted Rubber Solutions Built to Last
✅ Quality You Can Trust, Performance You Can Measure
✅ Engineered for Superior Durability and Performance
✅ The Gold Standard in Rubber Manufacturing
✅ Nationwide Supply, Regional Service, Global Standards
✅ The One-Stop Source for All Rubber & Elastomer Products
✅ The Widest Product Range in Malaysia’s Rubber Industry
✅ Extensive Coverage Across All Malaysia States – Peninsular & Borneo