Shanghai Songjiang Jingning Shock Absorber Co.,Ltd.
| Delivery Time | 5--15 working days |
| Flange Standard | PN10/16, Class150#, Class300#, JIS5K, JIS10K |
| Flange Material | Carbon steel, SS304, SS316 |
| Company Type | Factory |
| Power | Manual |
| Applicable Media | Air, Water, Oil, Weak Acid and Alkali |
| Material | EPDM,NBR,NR, CR, FKM |
| Main Frame | Nylon Cord Fabric |
| Head Code | Round |
| Material Of Flange | Q235, SS304, SS316, SS316L |
| Working Temperature | -20℃~150℃ |
| Packaging Details | carton or wooden |
| Product Drawings | Offer |
| Color | Black |
| Businese Type | Rubber expansion joints manufacturer |
| Axial Displacement | 6-18 mm |
| Payment Terms | Western Union,T/T,L/C,D/A,D/P,MoneyGram |
| Product name | Rubber Expansion Joint Standard High Pressure Resistant In Piping Customized |
| Size | DN50 |
| Warranty | 12 months |
| Application | Pipeline systems |
| Keyword | Rubber Expansion Joint Standard |
| Standard | DIN/ANSI/JIS/BS |
| Temperature Rating | 200°F |
| Supply Ability | 10000 sets per week |
| OEM/ODM | for 20 Year's Experience |
| Connection Type | Flanged |
| Feature | Small Volume |
| Shape | Round |
| Oem | Yes |
| Nominal Diameter | 32mm - 1800mm |
| Deflection Angle | 10° - 15° |
| Resistance | Corrosion and abrasion resistant |
| Customized Support | OEM, ODM |
| Surface Treatment | Cold Galvanized |
| Standard Of Flange | ANSI, DIN, JIS, EN, etc |
| Warranty Time | 12 months |
| In Stock | 20000 |
| Rubber Joint Material | EPDM,NBR,CR,PTFE,etc. |
| Operating Medium | Water, Oil, Air, Chemicals |
| Installation Manual | offer |
| Model Number | RLJS |
| Brand Name | JINGNING |
| Certification | CE，ISO |
| Place of Origin | China |
View Detail Information
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Product Specification
| Delivery Time | 5--15 working days | Flange Standard | PN10/16, Class150#, Class300#, JIS5K, JIS10K |
| Flange Material | Carbon steel, SS304, SS316 | Company Type | Factory |
| Power | Manual | Applicable Media | Air, Water, Oil, Weak Acid and Alkali |
| Material | EPDM,NBR,NR, CR, FKM | Main Frame | Nylon Cord Fabric |
| Head Code | Round | Material Of Flange | Q235, SS304, SS316, SS316L |
| Working Temperature | -20℃~150℃ | Packaging Details | carton or wooden |
| Product Drawings | Offer | Color | Black |
| Businese Type | Rubber expansion joints manufacturer | Axial Displacement | 6-18 mm |
| Payment Terms | Western Union,T/T,L/C,D/A,D/P,MoneyGram | Product name | Rubber Expansion Joint Standard High Pressure Resistant In Piping Customized |
| Size | DN50 | Warranty | 12 months |
| Application | Pipeline systems | Keyword | Rubber Expansion Joint Standard |
| Standard | DIN/ANSI/JIS/BS | Temperature Rating | 200°F |
| Supply Ability | 10000 sets per week | OEM/ODM | for 20 Year's Experience |
| Connection Type | Flanged | Feature | Small Volume |
| Shape | Round | Oem | Yes |
| Nominal Diameter | 32mm - 1800mm | Deflection Angle | 10° - 15° |
| Resistance | Corrosion and abrasion resistant | Customized Support | OEM, ODM |
| Surface Treatment | Cold Galvanized | Standard Of Flange | ANSI, DIN, JIS, EN, etc |
| Warranty Time | 12 months | In Stock | 20000 |
| Rubber Joint Material | EPDM,NBR,CR,PTFE,etc. | Operating Medium | Water, Oil, Air, Chemicals |
| Installation Manual | offer | Model Number | RLJS |
| Brand Name | JINGNING | Certification | CE，ISO |
| Place of Origin | China | ||
| High Light | Chemical-resistant rubber expansion joint ，PTFE lined flanged bellows ，Acid alkali pipeline expansion joint | ||
Chemical-Resistant Flanged Rubber Joint: Heavy-Duty PTFE Lined Expansion Bellows for Acid & Alkali Pipelines
Product Description
The Heavy-Duty PTFE Lined Rubber Expansion Joint represents the pinnacle of fluid handling safety, specifically engineered to bridge the gap between absolute chemical inertness and mechanical flexibility. Standard rubber expansion joints quickly degrade when exposed to aggressive chemicals, but this specialized component features an integrated, high-density PTFE (Polytetrafluoroethylene) liner seamlessly molded into the interior bore of a robust elastomer body.
This design completely isolates the outer structural rubber and reinforcing nylon cords from the flowing medium, providing an impenetrable barrier against concentrated acids, strong alkalis, organic solvents, and volatile chemicals. Equipped with heavy-duty backing flanges that conform to global piping standards, this flexible bellows coupler effectively neutralizes structural stress, absorbs thermal expansion and contraction, and dampens destructive vibrations generated by industrial pumps and heavy machinery, ensuring long-term operational stability in severe-service environments.
Performance characteristics
Exceptional Chemical Inertness: The premium-grade PTFE lining offers near-universal chemical resistance, effortlessly handling highly corrosive media including sulfuric acid, hydrochloric acid, nitric acid, and sodium hydroxide without blistering, cracking, or eroding.
Omni-Directional Movement Compensation: The single-sphere molded rubber architecture yields smoothly to multi-axial displacements, accommodating substantial axial compression, extension, lateral deflection, and angular misalignment simultaneously.
Advanced Shock & Noise Absorption: The high-damping synthetic rubber exterior acts as a kinetic energy sink, isolating mechanical vibrations from pumps and compressors to prevent pipe fatigue, joint shearing, and solid-borne acoustic echoing.
Non-Stick, Anti-Scaling Bore: The ultra-smooth interior surface of the PTFE liner minimizes fluid friction, prevents chemical sediment or biological scaling from adhering to the walls, and maintains a clean, uninterrupted volumetric flow velocity.
Vacuum and Surge Resilience: Reinforced internally with multi-strand fiber plies and advanced vulcanization techniques, the joint maintains its dimensional stability under severe pressure surges, while specialized structural anchoring prevents the lining from collapsing or delaminating under negative vacuum pressure.
Product Specification
| Size | Length | Allowable Movements in Operation | ||||
| mm | inch | mm | Axial Compression mm | Axial Extension mm |
Transverse Movement mm |
Angular Deflection mm |
| 25 | 1 | 130/152 | 20 | 12 | 14 | 15° |
| 32 | 1 1/4 | 95/130/152 | 20 | 12 | 14 | 15° |
| 40 | 1 1/2 | 95/130/152 | 20 | 12 | 14 | 15° |
| 50 | 2 | 105/130/152 | 20 | 12 | 14 | 15° |
| 65 | 2 1/2 | 115/130/152 | 20 | 12 | 14 | 15° |
| 80 | 3 | 130/135/152 | 20 | 12 | 14 | 15° |
| 100 | 4 | 130/152 | 20 | 12 | 14 | 15° |
| 125 | 5 | 130/152/165 | 20 | 12 | 14 | 15° |
| 150 | 6 | 130/152/185 | 20 | 12 | 14 | 15° |
| 200 | 8 | 130/152/210 | 20 | 12 | 14 | 15° |
| 250 | 10 | 130/203/230 | 20 | 12 | 14 | 15° |
| 300 | 12 | 130/203/245 | 25 | 16 | 22 | 15° |
| 350 | 14 | 200/255 | 25 | 16 | 22 | 15° |
| 400 | 16 | 200/255 | 25 | 16 | 22 | 15° |
| 450 | 18 | 200/255 | 25 | 16 | 22 | 15° |
| 500 | 20 | 200/255 | 25 | 16 | 22 | 15° |
| 600 | 24 | 260 | 25 | 16 | 22 | 15° |
| 700 | 28 | 260 | 25 | 16 | 22 | 15° |
| 800 | 32 | 260 | 25 | 16 | 22 | 15° |
| 900 | 36 | 260 | 25 | 16 | 22 | 15° |
| 1000 | 40 | 260/300 | 25 | 16 | 24 | 15° |
| 1100 | 44 | 300 | 25 | 16 | 24 | 15° |
| 1200 | 48 | 300 | 25 | 16 | 24 | 15° |
|
Note: If the medium is oil, acidic or alkaline substances, and there are special requirements for the working temperature, you can customize it by sending a letter or drawing. Please specify when ordering |
Product Details
Production Flow
|
1.Raw material Top level CR/EPDM/NBR rubber raw materials, No recycled rubber |
2.Plasticating and mixing Special Formulation for better Bending with Nylon,For Better Strength,Sealing |
3.Workblanks wraping Cooper plated steel wire reinforcement prevent pull off |
|
4.Vulcanizing Automatic vulcanization machine ensure vulcanization time and pressure |
5.Inspecting |
6. Packaging |
Application
Rubber Expansion Joint Standard are widely used in various fields, including construction, chemical industry, shipbuilding, tap water, gas, chemical pipelines, petroleum pipelines, food pipelines, air conditioning pipelines, and sewage treatment.
Our Services
1.24-hour online
2.Free samples provided
3.Support customization
4.Provide drawings
5.Multiple payment styles to choose from
6.Factory inspection (material, specifications, quantity, pressure, packaging)
7.Long warranty period
8.Suitable packaging for transportation
Our Customer
Certificate
FAQ
Standard elastomers like EPDM or NBR have chemical limitations; they swell, harden, or dissolve when exposed to aggressive fluids like concentrated acids, petroleum solvents, or harsh oxidizing agents. The PTFE liner provides an inert protective barrier, allowing you to utilize the superior vibration-damping benefits of a rubber joint in chemical environments where rubber alone would fail within weeks.
Because PTFE is naturally more rigid than rubber, a lined expansion joint will have slightly higher stiffness and lower maximum movement limits compared to an unlined rubber joint of the same size. However, our specialized molding process ensures the PTFE lining perfectly mirrors the bellows geometry, maintaining excellent multi-axial compensation while preserving chemical safety.
Our heavy-duty joints utilize a specialized mechanical and thermal bonding process during vulcanization. The PTFE lining extends entirely through the bore and curls outward over the raised rubber flange face (creating a flared face). This design locks the liner in place, meaning fluid pressure actually presses the liner tighter against the housing, preventing delamination or slip-outs.
Company Details
Business Type:
Manufacturer
Year Established:
2004
Total Annual:
30000000-50000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Jingning is a specialist company in expansion joints for pipe equipment. Since 2004 we stand for values which are typical of a family owned company: the spirit of innovation, reliability, continuity and flexibility in thought and action.We are a reliable supplier to our customers who count... Jingning is a specialist company in expansion joints for pipe equipment. Since 2004 we stand for values which are typical of a family owned company: the spirit of innovation, reliability, continuity and flexibility in thought and action.We are a reliable supplier to our customers who count...
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