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Rubber soft joints, also known as rubber flexible joints, soft joints, shock absorbers, pipe shock absorbers, shock absorber throats, etc.It is a high Flexible, highly airtight, medium resistant and weatherproof pipe joints.It has the characteristics of vibration reduction, high temperature resistance, flexibility and friction resistance. It is suitable for the connection of pipeline dislocation difference, displacement, size change and vibration parts.
PTFE lined joint is based on the original conventional rubber joint, adding PTFE coating lining inside, which can effectively protect the rubber joint from corrosion and medium erosion. For example, strong acid, strong alkali or high-temperature oil, PTFE coating can effectively adhere to the inner wall of the pipeline, prevent the separation caused by medium erosion or pipeline tensile contraction, so that the original mechanical and physical properties of flexible rubber joint are not affected, and can still compensate for pipeline vibration, absorb pipeline displacement and reduce pipeline noise.

Rubber expansion joint series products:
single sphere rubber expansion joint, double ball rubber expansion joint, concentric diameter rubber expansion joint, reducer rubber expansion joint, food grade rubber expansion joint, threaded connection rubber expansion joint.

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Material of all parts
No. | Name | Material |
1 | Flange | SS304 |
2 | Pressurized ring | Steel wire strand |
3 | Lined | PTFE |
4 | Outer/inner rubber | NR/NBR/EPDM |
5 | Frame | Nylon cord fabric |
Technical Conditions
Ⅰ | Ⅱ | Ⅲ | |
Working pressure(Kg f/cm²) | 1.0(10) | 1.6(16) | 2.5(25) |
Explosion pressure(Kg f/cm²) | 2.0(20) | 3.0(30) | 4.5(45) |
Vacuum(mmHg) | 53.3(400) | 86.7(650) | 100(750) |
Applicable Temperature | -15℃ - +80℃ (the special can reach -30℃ - +150℃) | ||
Applicable Media | Air, Water, Oil, Weak Acid and Alkali etc. | ||

The above data is for reference only. If you want to know more about product details or parameters, please click here to consult us
Features of rubber expansion joint:
1). Small volume, light weight, good elasticity, easy installation and maintenance.
2). Transverse, axial and angular displacements may occur during installation, which are not restricted by the pipeline not concentric and the flange not parallel.
3). When working, it can reduce the transmission noise and strong vibration absorption ability.
Advantage of PTFE lined rubber expansion joint:
The PTFE lined rubber expansion joint has excellent chemical stability and corrosion resistance. It is one of the best corrosion resistant materials today. Except for molten metal sodium and liquid fluorine, it can resist all kinds of chemicals. It can not change when boiling in aqua regia. It is widely used in all kinds of acid-base and organic solvent resistant.

Applications of PTFE lined rubber expansion joint:
It is more common in chemical pipeline, mainly used in strong acid-base, strong high temperature, strong corrosion pipeline equipment, especially in corrosive medium, including: conveying pipe, exhaust pipe, steam pipe of corrosive gas, high-pressure oil pipe of rolling mill, heat exchanger, lining of tower and tank, valve and other chemical equipment.
The following pictures is our regular rubber joint application

Suitable medium of PTFE lined rubber expansion joint:
According to different material, acid resistance rubber joint, flameproof rubber joint, oil resistant rubber joint, thermostatic rubber joint, low temperature resistant rubber joint, wear resistance rubber joint can be made to suitable for various kinds of medium, and environment.
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1. Inner package: plastic film / carton cases
2. Outer pacakge: wooden cases

♦ We offer good quality products in competitive price.
♦ We have rich experience in this industry.
♦ We have short delivery time .
♦ Shipped the goods on time.
♦ Meet your special requirements.
Gongyi Runda Pipeline Equipment Manufacturing Co., Ltd. is a professional manufacturer of pipe connectors, compensators, telescopes and other pipe fittings. It is located in the Pipeline Industrial Park of Xicun Town, Gongyi City, Henan Province. It covers an area of more than 1000 square meters and has complete production equipment.
Our company mainly provides products ranges from rubber expansion joint, metal expansion joint, stainless steel bellows,repair clamp, dismantling joint, flange adaptor, dresser coupling, non metallic compensator,etc.



If you are interested in our products,pls click here to contact us now.
Q: Can you make the product as per client's requirement?
A: Yes, we can make it with your exact requirement
Q: What are your payment terms?
A: T/T (30% as despot, the rest 70% will be paid before delivery), L/C at sight
Q: Where is your nearest loading port?
A: Shanghai, Qingdao or Tianjin, China.
Q: How can you guarantee the quality or any warranty?
A: Check the specification, material and appearance before delivery, and approve the delivery after qualified
B: Support third-party inspection
Q: Do you accept small quantity order?
A: Of course we do.
Q: Can we choose different material.
A: Yes, the material can be chose according to your requirement.
Q: what is your shipment and delivery time?
A: By sea or air. Normally 7 to 14 Days for delivery, according to your order quantity.
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