10 Bar Pressure Rating Flexible Bellows Coupler: Industrial Strength Anti-Burst Rubber Pipe Joint for HVAC Systems
The Heavy-Duty Vibration and Acoustic Barrier for Modern HVAC Infrastructure.
The 10 Bar Pressure Rating Flexible Bellows Coupler is an industrial-strength piping component purpose-built to deliver quiet, continuous, and leak-free operation in demanding HVAC, district cooling, and commercial fluid transfer networks. High-output centrifugal chillers, cooling towers, and circulating pumps generate intense mechanical vibration, hydraulic noise, and thermal expansion forces that can cause severe stress on rigid piping networks, leading to joint fatigue and costly system leaks.
Engineered to operate continuously at a working pressure of 10 bar (145 PSI / 1.0 MPa), this anti-burst flexible coupler features a thick elastomeric body reinforced with multi-layered, high-tenacity synthetic cord fabrics and embedded steel wire rings. Outfitted with precision-machined backing flanges, this coupler acts as a robust kinetic energy absorber. It neutralizes pump-induced vibration, dampens acoustic noise transmission through the building framework, and seamlessly compensates for thermal growth cycles—ensuring long-term operational reliability across heavy-duty heating and cooling installations.
Performance characteristics
10 Bar Anti-Burst Design: Built with high-tensile fabric cord plies and high-strength embedded wire reinforcement, providing an operational pressure rating of 10 bar with a high safety burst margin.
Superior Vibration & Acoustic Isolation: The resilient elastomeric bellows acts as a kinetic damper, effectively isolating high-frequency motor hum, pump vibration, and fluid pulsations before they propagate into building structures.
Thermal Growth & Stress Relief: The single-sphere arch geometry yields smoothly to dynamic piping stress, simultaneously absorbing axial compression, axial extension, lateral shearing, and angular misalignments.
Corrosion & Weather-Resistant Shell: Formulated with an outer cover compound that resists ozone, UV radiation, condensation, and ambient thermal variations common in boiler rooms and outdoor cooling tower installations.
Optimized Low-Turbulence Flow: Features a smooth internal arch design that maintains steady volumetric flow, minimizes internal fluid friction, and prevents air entrapment within closed-loop HVAC systems.
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
100% strict inspection is to be responsible for consumers
|
6. Packaging
Protective Packaging for No
Rust and Breakage
|
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
Q1: What does a "10 Bar Pressure Rating" mean for an HVAC rubber joint?
A 10 bar rating indicates that the flexible coupler is tested and rated to operate continuously under working pressures up to 10 bar (approx. 145 PSI or 1.0 MPa) at standard operating temperatures. This easily satisfies the pressure requirements of most chilled water, hot water, and condenser water circulation lines in commercial HVAC systems.
Q2: Why is an anti-burst flexible coupler necessary near chillers and large circulation pumps?
Pumps and chillers generate continuous mechanical vibration and sudden pressure shocks (water hammer) during startup and shutdown. Connecting rigid piping directly to these units transfers destructive stresses to equipment nozzles and building frames. An anti-burst rubber coupler absorbs these forces, preventing pipe cracking, flange weeping, and equipment damage.
Q3: What elastomer materials are recommended for HVAC hot water versus chilled water lines?
-
EPDM: The ideal industry standard for hot water, chilled water, and mild glycol solutions, offering excellent thermal range, ozone resistance, and anti-aging properties.
-
NBR (Nitrile): Recommended if the fluid stream contains trace oils, hydraulic lubricants, or petroleum-based additives.
Q4: Are control units (limit rods) required when installing this 10 bar joint in HVAC systems?
Control units (tie rods) are strongly recommended if the piping system is unanchored or installed on elevated pipe racks. The limit rods prevent the flexible bellows from over-extending beyond its maximum allowable movement limits during unexpected hydraulic surges or pump startups.
Q5: How does this flexible coupler help reduce noise levels inside commercial buildings?
Metal pipes act as acoustic conductors, transferring pump motor noise directly into occupied building spaces. The dense elastomeric body of this flexible coupler breaks the rigid metal-to-metal contact path, dampening sound waves and mechanical hum right at the equipment interface.
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