EPDM Flexible Connector
The EPDM Flexible Connector is a flanged rubber expansion joint with an EPDM flexible body. It is used for building water supply and drainage, HVAC circulation, fire sprinkler systems, water-treatment piping, and pump or chiller connections.
Description
EPDM flexible connector
Product Overview
The EPDM Flexible Connector is a flanged rubber expansion joint with an EPDM flexible body. It is used for building water supply and drainage, HVAC circulation, fire sprinkler systems, water-treatment piping, and pump or chiller connections.
Core Specifications and Parameters
|
Parameter Item |
Index Details |
|
Product Model |
REJ |
|
Nominal Diameter |
DN25-DN3000 |
|
Working Pressure |
PN6-PN40 |
|
Connection Method |
Flange connection |
|
Flange Standard |
DIN, JIS, GB, etc. (customizable on demand) |
|
Flange Material |
Carbon steel, stainless steel 304, stainless steel 316, etc. |
|
Main Rubber Material |
EPDM (NR, NBR, PTFE lining optional) |
|
Working Temperature |
-15~+80℃ (customizable to -30~+150℃ for special working conditions) |
|
Test Pressure |
1.5 times the working pressure |
|
Applicable Media |
Clean water, air, weak acid and alkali media, etc. |
|
Structure Form |
Single sphere |
|
Warranty Period |
12 months |
|
Customization Service |
OEM/ODM, support customization of material and specification |
Core Advantages
1. EPDM resistance to outdoor and water-service aging. EPDM stays elastic under sunlight, ozone, rain, and repeated hot-cold water cycles. On rooftop HVAC lines, outdoor pump stations, and building service pipes, the surface is less prone to weather cracking and continues to flex through seasonal temperature changes.
2. Integrated cord and rubber body. Nylon cord layers are embedded and vulcanized inside the sphere rather than fitted as separate sleeves. Under pump vibration and cyclic line pressure, they spread load around the body and limit permanent deformation caused by local stretching.
3. Compact movement and noise isolation. The single-sphere shape takes up axial movement, lateral offset, and angular deflection without using much pipeline length. At chiller, heat exchanger, and circulation-pump connections, it cuts structural sound transmission and reduces repeated stress on adjacent threaded or welded joints.
Customization Capabilities
The connector is available from DN25 to DN3000 and PN6 to PN40, with DIN, ANSI, JIS, or GB flange drilling in coated carbon steel, SS304, or SS316.
The EPDM body can be specified in standard, food-contact, or special-temperature formulations. Reducer profiles, full-end sealing, and extended face-to-face lengths can be produced to match the installation.
Quality Control
EPDM compound composition and physical properties are checked before production. A rotorless vulcanizer confirms the curing curve, while molding temperature, pressure, and time are recorded for batch control. Finished connectors receive 100% surface and dimensional inspection and a hydrostatic test at 1.5 times working pressure. Selected production batches also undergo tensile and thermal-aging tests. Customer-appointed third-party inspection is accepted.
FAQ
Q: How long does a custom sample take?
A: A custom sample normally takes 15 to 20 days after the drawing, flange standard, rubber formulation, and working conditions are approved.
Q: Can different sizes be mixed in one order?
A: Yes. The minimum order is 10 pieces, and different sizes or flange materials can be combined after the order list is confirmed.
Q: Is EPDM suitable for oil pipelines?
A: No. Use an NBR rubber connector for mineral oil, fuel, lubricating oil, or hydraulic oil service.
Q: Can EPDM be used for drinking-water piping?
A: Yes. A food-contact EPDM formulation and stainless or protected flanges can be produced for drinking-water and purified-water systems.
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