Your Professional Rubber Flexible Joint Supplier
TIANJIN XTD VALVE CO., LTD. is a professional manufacturer of various valves, including butterfly valves, gate valves, filters, ball valves, globe valves, and more.
Unlike ordinary valve manufacturers, XTD VALVE owns its own rubber factory and valve stem processing facility, allowing for greater control over quality and production efficiency.
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![Single Sphere Rubber Joint]()
Single Sphere Rubber JointAs a critical flexible connector, the rubber expansion joint absorbs pipeline displacement and vibration to prevent flange leaks or pipe fractures. Its multi-layer structure — EPDM inner lining,
Why choose us
Our Certificates
Our products have passed ISO 9001 certification. We have also been recognized as a high-tech enterprise, received an AAA credit rating certificate, and hold multiple patents.
Production & Market
Since its establishment, TIANJIN XTD VALVE CO., LTD. has gained strong domestic sales due to its excellent quality and solid reputation.While maintaining a firm foothold in the domestic market, the company actively explores international markets by participating in global exhibitions, showcasing product advantages, and establishing relationships with customers worldwide. Our products are exported to multiple countries and regions, including Indonesia and other international destinations.
Our Services
From CAD drawings to delivery – We provide seamless service:
● 1-on-1 Engineering Support with over 30 years of expertise
● 15-Day Fast Delivery for standard valves
● Custom Solutions at no additional cost
Rubber Flexible Joint
Rubber flexible joints are specialized parts made to boost the efficiency together with sturdiness of piping systems. They are mostly utilized to soak up resonances, make up for motions together with decrease anxiety on pipelines brought on by thermal growth, stress variations or mechanical pressures. These joints are created from premium elastomers such as EPDM, Neoprene or Nitrile as well as are commonly enhanced with extra products like nylon or cable mesh for included stamina.
The layout of a rubber flexible joint usually consists of a rubber body, support layers together with end links such as flanges or threaded installations. The rubber body gives flexibility along with versatility while the support makes certain the joint can hold up against high stress plus considerable tension. Flanges or end links protect the joint to the piping system creating a limited seal that stops leakages while permitting the joint to execute its feature.
|
Item |
KXT-A1 |
KXT-A2 |
KXY-A3 |
|
MPa (kgf/cm²) Working pressure |
1.0 (10) |
1.6 (16) |
2.5 |
|
MPa (kgf/cm²) Explosion pressure |
2.0 (20) |
3.0 (30) |
4.5 (45) |
|
KPa (mm/Hg) Vacuum |
53.3 (400) |
86.7 (650) |
100 (750) |
|
℃ Applicable Temperature |
-15℃~+115℃ (-30℃~+250℃ under special conditions) |
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|
Applicable Media |
Air, compressed air, water, sea, water, hot water, oil acid, alkali, and so on. |
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|
DN (Nominal Diameter) |
Length (mm) |
Axial displacement mm |
Horizontal Displacement (mm) |
Angular deflection (a1+a2) |
||
|
mm |
inch |
Extension |
Compression |
|||
|
32 |
1.25 |
95 |
6 |
9 |
9 |
15 |
|
40 |
1.5 |
95 |
6 |
10 |
9 |
15 |
|
50 |
2 |
105 |
7 |
10 |
10 |
15 |
|
65 |
2.5 |
115 |
7 |
13 |
11 |
15 |
|
80 |
3 |
135 |
8 |
15 |
12 |
15 |
|
100 |
4 |
150 |
10 |
19 |
13 |
15 |
|
125 |
5 |
165 |
12 |
19 |
13 |
15 |
|
150 |
6 |
180 |
12 |
25 |
14 |
15 |
|
200 |
8 |
210 |
16 |
25 |
22 |
15 |
|
250 |
10 |
230 |
16 |
25 |
22 |
15 |
|
300 |
12 |
245 |
16 |
25 |
22 |
15 |
|
350 |
14 |
255 |
16 |
25 |
22 |
15 |
|
400 |
16 |
255 |
16 |
25 |
22 |
15 |
|
450 |
18 |
255 |
16 |
25 |
22 |
15 |
|
500 |
20 |
255 |
6 |
25 |
22 |
15 |
|
600 |
24 |
260 |
6 |
25 |
22 |
15 |
|
700 |
28 |
260 |
16 |
25 |
22 |
15 |
|
800 |
32 |
260 |
16 |
25 |
22 |
15 |
|
900 |
36 |
260 |
6 |
25 |
22 |
15 |
|
1000 |
40 |
260 |
18 |
26 |
24 |
15 |
|
1200 |
48 |
260 |
18 |
26 |
24 |
15 |
|
1400 |
56 |
350 |
20 |
28 |
26 |
15 |
|
1600 |
64 |
350 |
25 |
35 |
30 |
10 |
Technical Parameters
|
Size |
DN32-DN600 |
DN650-DN2000 |
|
Working pressure |
16Bar |
10Bar |
|
Shell |
24Bar |
15Bar |
|
Seal |
18Bar |
11Bar |
|
Operating Temperature |
-45°C~+150°C |
|
|
Operating Environment |
Ballast and bilge system Chemical processing Desalination plants |
|
|
Driving Method |
Hand Lever Worm Gear Electric Pneumatic |
|
Executive Standards
|
Design Standard |
EN 593, MSS SP67, API 609, BS 5155 |
|
Inspection & Test |
API 598, ISO 5208, EN 12266 |
|
End Standard |
ANSI B16.1 CL. 125LB & B16.5 CL. 150LB |
|
AS 2129 Table D & E |
|
|
BS 10 Table D & E |
|
|
DIN 2501 (PN6, PN10, PN16) |
|
|
EN 1092 (PN6, PN10, PN16) |
|
|
ISO 2531 (PN6, PN10, PN16), 7005 (PN6, PN10, PN16) |
|
|
KS B / JIS B 1511 / 2210 (5K & 10K) |
|
|
MSS SP44 CL. 150LB |
|
|
AWWA C207 |
|
|
SABS 1123 Table 1000/3 & Table 1600/3 |
|
|
Face to Face |
ISO 5752, EN 558, MSS SP67, API 609, DIN 3202 |
|
Top Flange |
ISO 5211 |
Types of Flexible Rubber Joints
Flexible rubber joints come in various types to meet different operational demands in piping systems. The most common are:
Single Sphere Joints
These are the simplest rubber joint designs, flexible and good at movement absorption. They fit systems with relatively small adjustments and are usually much cheaper than more complicated designs.
Double Sphere Joints
These joints contain another sphere than the single type and are suitable for more dynamic systems.
Spool Type Joints
They are longer and tougher for big movements/high pressure applications. These are used where great thermal expansion occurs.
Functions And Benefits
Movement Compensation
One of the primary functions of a rubber flexible joint is to compensate for thermal expansion and contraction in piping systems. As the temperature of the fluid flowing through the pipes changes, the pipes expand or contract. The flexible joint absorbs these dimensional changes, preventing excessive stress on the pipes, valves, and other components, which could otherwise lead to leaks, cracks, or even system failure.
Vibration and Noise Reduction
In industrial processes, pumps, compressors, and other rotating equipment generate significant vibrations and noise. Rubber flexible joints act as effective vibration isolators, damping the transmission of mechanical vibrations from the equipment to the connected piping and structure. By reducing vibrations, these joints help minimize noise levels, enhance operator comfort, and protect sensitive equipment from vibration-induced damage.
Misalignment Correction
During installation or due to settlement of the supporting structure, pipes may become misaligned. A rubber flexible joint can accommodate small amounts of lateral, angular, and axial misalignment between connected pipes, ensuring a proper seal and preventing the development of excessive stress concentrations that could compromise the integrity of the system.
Shock Absorption
In systems subjected to sudden pressure surges, water hammer, or other transient forces, rubber flexible joints provide shock absorption capabilities. The flexible rubber material can deform temporarily to absorb the energy of the shock, protecting the piping and equipment from damage and reducing the risk of catastrophic failures.
Sealing and Leakage Prevention
The rubber material of the joint forms a reliable seal against the fluid being transported, preventing leaks and maintaining system efficiency. The flexibility of the joint also allows it to adapt to minor surface irregularities on the connecting flanges, ensuring a tight and leak-free connection.
Key Components of a Rubber Flexible Joint
Rubber Body
|
Feature |
Rubber Flexible Joints |
Metal Joints |
|
Flexibility |
Excellent |
Moderate |
|
Vibration Isolation |
Superior |
Limited |
|
Corrosion Resistance |
High |
Susceptible to rust |
|
Weight |
Lightweight |
Heavier |
|
Cost |
Lower upfront and maintenance |
Higher initial and upkeep costs |
1.The core part giving adaptability plus activity absorption
2.Constructed from elastomers customized to details applications such as EPDM for water systems or Nitrile for oil handling
Support Layers
1.Inner supports made from material, steel rings or cord mesh
2.Developed to improve stamina as well as resilience under stress
End Connections
1.Flanged, threaded, or balanced out links safeguard the joint to the piping system
2.Makes sure a leak-proof seal plus simple installment
Installation instructions
1. During installation, it is prohibited to install rubber flexible joints that exceed the displacement.
2. When the rubber joint is installed horizontally, suspended and vertically, the actual working axial displacement pressure of the rubber joint is less than the supporting force of the pipeline.
3. The pipe shall have fixed support or bracket, and the force of bracket shall be greater than the axial force.
4. During vertical installation and overhead installation, corresponding fixed supports and load-bearing supports shall be installed at both ends of the product to prevent the product from pulling off after working under pressure.
5. Keep away from heat source during installation, and do not use media that do not meet the requirements of this product.
Applications
Rubber flexible joints find extensive use in a diverse range of industries, including:
Water and Wastewater Treatment
In water supply and sewage treatment plants, these joints are used to connect pipes, pumps, and valves, accommodating thermal movements and reducing vibration from machinery.
HVAC Systems
Heating, ventilation, and air conditioning systems rely on rubber flexible joints to connect ductwork and pipes, compensating for thermal expansion and minimizing noise transmission.
Power Generation
In power plants, they are employed in steam and water piping systems to handle high temperatures, pressures, and vibrations.
Chemical Processing
The chemical industry uses rubber flexible joints to transport various corrosive and abrasive fluids, as the rubber can be formulated to resist specific chemicals.
Oil and Gas
In pipelines and refineries, these joints help manage the expansion and contraction of pipes due to temperature changes and pressure fluctuations.
FAQ
We're well-known as one of the leading rubber flexible joint manufacturers and suppliers in China. Please feel free to buy high quality rubber flexible joint at competitive price from our factory. For more information, contact us now.
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