Limit Rod Single Sphere Rubber Expansion Joint NBR Large Diameter Flange DIN ANSI JIS DN25-DN4000
Product Description:
The Liwei Limit Rod Single Sphere Flexible Rubber Expansion Joint is a large diameter restrained compensator fitted with a limit rod / limit device that controls axial displacement and prevents pipe pull-out. Built with an NBR (nitrile) rubber body, it offers strong oil resistance and chemical resistance for large bore pipelines. The limit device keeps the single sphere body within its safe movement range while still absorbing vibration, noise and thermal movement. With multi-standard DIN / ANSI / JIS flanges and a DN25 to DN4000 range, it is a durable and leak-free solution for large diameter water, oil and chemical lines.
Features & Advantages:
- Limit rod / limit device controls axial displacement and prevents pipe pull-out.
- Large diameter range DN25 to DN4000 for main pipelines.
- NBR (nitrile) body with strong oil resistance and chemical resistance.
- Leak-free molded single sphere design with zero leakage.
- Multi-standard flanges: DIN, ANSI 150 / Class 150, JIS 10K, BS.
- Durable molded / hand-wound body with steel wire and nylon cord reinforcement.
Applications:
- Large diameter water supply and drainage mains
- Oil transfer and fuel pipelines
- Chemical and petrochemical plants
- Wastewater treatment and environmental protection
- HVAC and pump connections
Technical Parameters:
| Product Type | Limit Rod Single Sphere Rubber Expansion Joint |
| Body Material | NBR / EPDM / Neoprene (CR) |
| Limit Device | Limit rod / tie rod with nuts (anti pull-out) |
| Flange Material | Carbon Steel / Hot-Dip Galvanized / SS304 / SS316 |
| Flange Standard | DIN / ANSI 150 / JIS 10K / BS |
| Nominal Diameter | DN25 - DN4000 |
| Movement Capability | Axial / Lateral / Angular (±15°) |
| Certification | ISO9001, CE, third-party testing supported |
Support and Services:
- Delivery inspection (pressure test, specification test, material, quantity, packing).
- A 12-month quality warranty is provided, support third-party testing.
- Free solutions and drawings can be provided.
- 24h online service, quick response before and after sales.
- Support online factory inspection and free samples.
FAQ:
Q1: What does the limit device do?
A1: The limit rod / limit device restricts axial displacement across the joint and prevents pipe pull-out, keeping the rubber body within its safe movement range.
Q2: What sizes and media are supported?
A2: Sizes from DN25 to DN4000, with an NBR body for oil and chemical media, and EPDM / Neoprene options for water and other media.
Q3: What is the MOQ and packaging?
A3: The minimum order quantity is 1 set, packed with an inner plastic film and an outer wooden case; a steel frame is used for multi-piece packing.
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