01
Threaded Union Type Rubber Expansion Joint - China Suppliers & Factory for DN15-80, BSPT/NPT Standards
📋 Description
The Thread End Rubber Expansion Joint is a compact and flexible solution designed to absorb vibration, reduce noise, and compensate for thermal movement in small-diameter pipelines. With threaded connections on both ends, this joint is especially suitable for systems where flanged connections are not practical.
Made from high-quality EPDM or NBR rubber, the thread end rubber expansion joint is reinforced with strong synthetic fabric and internal steel rings to ensure stability under pressure and long-term durability. It is commonly used in residential piping, HVAC units, cooling systems, and small industrial lines.
This type of joint allows for axial compression and extension, making it ideal for tight spaces and compact installations. It also helps prevent pipe damage by relieving stress caused by vibration and movement.
Available in various thread sizes and pressure ratings, our thread end rubber expansion joints are engineered for easy installation and maintenance-free operation.
As one of China's top rubber joint manufacturers, we deliver reliable, certified solutions trusted by plumbing contractors and industrial engineers worldwide.
Made from high-quality EPDM or NBR rubber, the thread end rubber expansion joint is reinforced with strong synthetic fabric and internal steel rings to ensure stability under pressure and long-term durability. It is commonly used in residential piping, HVAC units, cooling systems, and small industrial lines.
This type of joint allows for axial compression and extension, making it ideal for tight spaces and compact installations. It also helps prevent pipe damage by relieving stress caused by vibration and movement.
Available in various thread sizes and pressure ratings, our thread end rubber expansion joints are engineered for easy installation and maintenance-free operation.
As one of China's top rubber joint manufacturers, we deliver reliable, certified solutions trusted by plumbing contractors and industrial engineers worldwide.
🔧
Working Pressure1.6 MPa rated working pressure
🌡️
Temperature Range-15°C ~ 115°C operating range
⚙️
Rubber OptionsEPDM or NBR inner liner available
📐
Size RangeDN15 (1/2") to DN65 (2-1/2")
🧱 Material
- Joint: Cast Iron
- Liner: NBR, EPDM
- Frame: Nylon cord fabric
- Pressurized Ring: Steel wire
⭐ Features
- Greatly absorb pipe movements, relieve stress, reduce system noise/vibration
- Small volume, small weight, good flexibility, easy installation and maintenance
- Strong resistance of acid, alkali, oil, and electrolytic
- Working Pressure: 1.6 MPa
📊 Standard of Implementation
Attribute |
Details |
Working Pressure (MPa) |
1.6 |
Bursting Pressure (MPa) |
3 |
Angle of Deflection |
15° |
Vacuity Kpa (mmhg) |
-15~115° |
Applicable Media |
Air, Compressed Water, Weak Acid, Alkali, etc. |
🔩 Standard Materials Of Main Parts
ITEM |
PART NAME |
MATERIAL |
1 |
Joint |
Cast |
2 |
Liner |
NBR |
3 |
Farm |
Stainless |
4 |
Steel wire |
CS |
📏 Dimensions (mm)
SIZE (in) |
DN |
L |
Axial Displacement (Stretch) |
Axial Displacement (Compression) |
Lateral Displacement |
1/2 |
15 |
180 |
5~6 |
22 |
22 |
3/4 |
20 |
180 |
5~6 |
22 |
22 |
1 |
25 |
180 |
5~6 |
22 |
22 |
1 1/4 |
32 |
200 |
5~6 |
22 |
22 |
1 1/2 |
40 |
210 |
5~6 |
22 |
22 |
2 |
50 |
220 |
5~6 |
22 |
22 |
2 1/2 |
65 |
245 |
5~6 |
22 |
22 |
❓ Frequently Asked Questions
Q What is a Thread End Rubber Expansion Joint used for?
A Thread End Rubber Expansion Joint is used to absorb vibration, reduce noise, and compensate for thermal movement and misalignment in small-diameter pipelines. It is commonly installed in HVAC systems, residential plumbing, cooling systems, and compact industrial pipelines where flanged connections are not practical.
Q What rubber materials are available for the inner liner?
The inner liner is available in NBR (Nitrile Butadiene Rubber) and EPDM (Ethylene Propylene Diene Monomer) rubber. NBR is ideal for oil-resistant applications, while EPDM is preferred for water, steam, and outdoor environments due to its superior weathering resistance.
Q What is the maximum working pressure for this expansion joint?
The Thread End Rubber Expansion Joint has a rated working pressure of 1.6 MPa and a bursting pressure of 3 MPa, making it suitable for most standard residential and light industrial piping systems.
Q What pipe sizes are available for this product?
Thread End Rubber Expansion Joints are available in sizes ranging from 1/2 inch (DN15) up to 2-1/2 inch (DN65). Each size is designed with specific length and displacement parameters to fit various installation requirements.
Q What media are compatible with this expansion joint?
This expansion joint is compatible with a wide range of media including air, compressed water, weak acid, and alkali solutions. The specific rubber compound (NBR or EPDM) should be selected based on the actual media used in your system to ensure optimal performance and longevity.
Q Is the Thread End Rubber Expansion Joint easy to install and maintain?
Yes. Thanks to its threaded end connections, the joint can be installed quickly without special tools or flanging equipment. Its compact and lightweight design makes it ideal for tight spaces. Once installed, it requires minimal maintenance, offering a cost-effective and long-lasting solution for pipeline flexibility.