Double Sphere Rubber Expansion Joint – Flexible & Durable Vibration Isolation Solution

Quick Overview:

The Double Sphere Rubber Expansion Joint is designed to absorb pipeline movements, reduce vibration, and compensate for thermal expansion. Featuring a double-sphere body, this joint offers superior flexibility and higher compression/elongation capabilities compared to single-sphere types. Ideal for HVAC, water treatment, chemical, and industrial piping systems.

Product Description

The Double Sphere Rubber Expansion Joint is a flexible connector made of high-quality synthetic rubber with reinforced nylon or polyester cord fabric and steel wire.

The dual-sphere structure provides extended movement range, better noise absorption, and increased service life. It is widely used to protect pumps, valves, and pipelines from stress caused by thermal changes, mechanical vibration, or misalignment.

Key Features & Advantages

1. Enhanced Flexibility: Double-sphere design allows greater axial, lateral, and angular movement.

2. Vibration & Noise Reduction: Minimizes mechanical stress and prevents damage to connected equipment.

3. Corrosion Resistance: Available in EPDM, NBR, Neoprene, and other rubber types for various media.

4. Easy Installation: Lightweight structure with flanged or threaded connections.

5. Long Service Life: Reinforced rubber and steel wire ensure durability under high pressure.

Technical Specifications

Displacement diagram of double-ball rubber joint

Applications

HVAC & chilled water systems

Potable water and wastewater treatment plants

Chemical and petrochemical pipelines

Fire protection systems

Marine and shipbuilding industry

Industrial machinery connections

Installation & Maintenance Tips

Check Alignment: Ensure piping is correctly aligned before installation.

Avoid Overstretching: Do not exceed the maximum extension or compression limits.

Support Pipelines: Use proper supports to prevent excessive load on the joint.

Regular Inspection: Check for cracks, leaks, or rubber aging periodically.

FAQ

Q1: What’s the difference between single and double sphere rubber joints?
A: Double sphere joints offer greater movement absorption and vibration damping due to the extra sphere, making them more suitable for applications requiring higher flexibility.

Q2: Can this joint be used for hot water or chemicals?
A: Yes, as long as the rubber material is compatible with the medium and temperature. EPDM is suitable for acid , while NBR works well with oil-based media.

Q3: What standards are the flanges made to?
A: We provide DIN, ANSI, JIS, and other customized standards upon request.

Order & Inquiry
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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.