Shanghai Songjiang Jingning Shock Absorber Co.,Ltd.
| 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 |
| 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 |
| 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 |
| 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 |
| Feature | Small Volume |
| Resistance | Corrosion and abrasion resistant |
| Customized Support | OEM, ODM |
| Shape | Round |
| Oem | Yes |
| Nominal Diameter | 32mm - 1800mm |
| Deflection Angle | 10° - 15° |
| Model Number | RLJS |
| Place of Origin | China |
| Certification | CE，ISO |
| Brand Name | JINGNING |
View Detail Information
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Product Specification
| 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 | 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 |
| 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 | 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 |
| Feature | Small Volume | Resistance | Corrosion and abrasion resistant |
| Customized Support | OEM, ODM | Shape | Round |
| Oem | Yes | Nominal Diameter | 32mm - 1800mm |
| Deflection Angle | 10° - 15° | Model Number | RLJS |
| Place of Origin | China | Certification | CE，ISO |
| Brand Name | JINGNING | ||
| High Light | PTFE lined expansion bellows ，fluoropolymer rubber connector ，single sphere rubber expansion joint | ||
High-Vacuum Rated PTFE Lined Expansion Bellows: Reinforced Fluoropolymer Rubber Connector for Negative Pressure Systems
The High-Vacuum Rated PTFE Lined Expansion Bellows is a premium, structurally reinforced pipeline connector specifically engineered to master the dual challenges of aggressive chemical corrosion and intense negative pressure. In industrial vacuum systems, chemical extraction processes, and pump suction lines, standard lined expansion joints face a critical failure mode: the negative pressure forces the internal lining to collapse inward, leading to catastrophic flow blockages or liner tearing. This heavy-duty connector solves this problem by combining an advanced, chemical-proof PTFE (Polytetrafluoroethylene) liner with an integrated internal structural reinforcement mechanism embedded directly within a multi-layered elastomeric matrix.
The virgin PTFE lining provides absolute chemical inertness against concentrated acids, strong alkalis, and volatile organic solvents, shielding the outer structural rubber shell from chemical attack. Supported by thick, precision-machined metal backing flanges, this high-vacuum rated connector safely dampens destructive machinery vibrations, accommodates omni-directional thermal shifts, and maintains its perfect cylindrical profile under full vacuum conditions, ensuring maximum process safety and zero-collapse reliability.
Performance characteristics
Vacuum Collapse Prevention: Specifically engineered with an internally anchored structural reinforcement system (such as integrated vacuum rings) that prevents the PTFE lining from deflating or delaminating under intense negative pressure or pump suction forces.
Universal Chemical Defense: The high-density fluoropolymer inner liner remains completely inert and non-reactive when exposed to the most aggressive industrial media, including concentrated nitric, sulfuric, and hydrochloric acids.
Multi-Axial Stress Compensation: The flexible single-sphere bellows configuration yields smoothly to dynamic pipeline movements, effortlessly absorbing concurrent axial compression, extension, lateral shear, and angular piping misalignments.
Premium Vibration Damping: The heavy-duty elastomer exterior housing acts as a highly efficient vibration isolator, absorbing solid-borne noise and high-frequency hydraulic pulsations from vacuum pumps and compressors.
Integrated Flared Face Sealing: The internal PTFE liner extends completely through the throat and flares outward across the entire sealing face of the flanges, creating a built-in, blowout-proof gasket surface that completely prevents leakage at connection interfaces.
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
In standard lined joints, the internal plastic liner is only bonded or loosely fitted to the rubber body. When a vacuum (negative pressure) occurs, the suction forces pull the liner inward away from the rubber wall, causing it to collapse and block the pipe flow. Our high-vacuum rated bellows is engineered with internal structural support rings integrated during the vulcanization process, locking the PTFE liner firmly against the structural bellows shell so it cannot collapse.
Our heavy-duty reinforced units are designed to withstand full vacuum conditions (up to $-0.1text{ MPa}$ or $29.9text{ inHg}$) safely, even at elevated operating temperatures where standard plastics naturally soften and become more susceptible to deformation.
No. The vacuum reinforcement rings are precisely integrated behind or flush with the PTFE lining profile depending on the exact model configuration. This keeps the internal bore smooth, minimizing fluid friction loss, maintaining optimal volumetric flow velocity, and preventing chemical sediments from caking inside the arch.
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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