Double Sphere NBR Rubber Expansion Joint

• Dual-sphere construction delivers greater axial, lateral and angular displacement compensation than single-sphere equivalents
• NBR rubber body resists mineral oils, lubricants and abrasion for extended service in oily industrial conditions
• Standard flanged ends fit GB, ISO, ANSI, BS and DIN pipeline systems without on-site modification
• Absorbs fluid pulsation and equipment vibration to reduce stress on pipe joints, valves and metering instruments

This expansion joint is widely deployed in high-rise building water supply, drainage and HVAC systems, typically installed at pump set inlets and outlets, pipeline bends and equipment connection sections. It also serves industrial oil medium pipelines in machinery, petrochemical and metallurgical sectors, buffering operational pulsation shocks and withstanding long-term oil exposure.

Henan Fuwei Pipeline Equipment Manufacturing Co., Ltd. provides full OEM and ODM services based on customer drawings, samples or site operating requirements. Custom configurations include alternate pressure ratings, non-standard bore sizes and tailored rubber formulations. Custom sample lead time is 15–20 days with an MOQ of 10 units, and free samples are available for performance verification.

Each unit passes through a structured quality control workflow supported by dedicated test equipment including pressure testers, vacuum testers, thermal aging chambers and universal tensile testing machines. Inspection covers raw material verification, in-process audits and final functional testing. 100% of units receive full inspection prior to packing, third-party inspection is accepted, and all products carry a 24-month warranty.

Small-bore units are individually packed in heavy-duty cartons with internal cushioning for moisture, scratch and impact protection, marked with clear product details for easy logistics sorting. Standard 20-foot container orders ship within 30 days; custom orders have a 40–50 day lead time. Supported trade terms include EXW, FOB and C&F.

• Mixed models and specifications are permitted in a single order meeting the minimum order quantity
• Regular production progress updates with photos and videos are provided throughout the manufacturing cycle
• Tiered volume discounts are available for large orders; contact the sales team for a detailed quotation

For custom configurations, material adjustments or project-specific pricing, share your pipeline specifications and operating conditions with our sales team for a tailored response.

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