NHFLEX-B TYPE HVAC Double Sphere Rubber Expansion Joint with SS304 Flanges

Name: HVAC Double Sphere Rubber Expansion Joint with SS304 Flanges
Brand: Ninghao
Rating: 5.0 (81 reviews)

Double Sphere Rubber Compensator Pipeline Expansion Joint for Vibration Absorber

The HVAC Double Sphere Rubber Expansion Joint with SS304 Flanges is engineered to manage thermal movement, vibration, and pipe misalignment in heating, ventilation, and air-conditioning systems. Its double-sphere design, combined with corrosion-resistant SS304 stainless steel flanges, delivers increased flexibility, reliable sealing performance, and long-lasting durability for demanding HVAC applications.

Characteristics

Enhanced Movement Capacity

The double-sphere design provides higher axial, lateral, and angular movement capacity compared to single-sphere joints, effectively accommodating thermal expansion and contraction in both hot and chilled water piping systems.

Corrosion-Resistant SS304 Flanges

SS304 stainless steel flanges offer superior resistance to rust, moisture, and chemical exposure—perfect for HVAC plant rooms, basements, rooftops, and humid environments.

Superior Vibration & Noise Control

Absorbs vibration from pumps, chillers, and fans, reducing structure-borne noise and improving indoor comfort.

Technical Specifications

Item	Specification
Product Type	Double Sphere Rubber Expansion Joint
Application	HVAC Systems
Rubber Material	EPDM / Neoprene / NBR
Flange Material	SS304 Stainless Steel
Connection Type	Flanged
Pressure Rating	PN10 / PN16
Temperature Range	–20°C to +120°C
Movement Capability	Axial / Lateral / Angular
Size Range	DN32 – DN600

Optional Customization

Rubber compound selection
Pressure rating upgrade
Flange standard (DIN / ANSI / JIS)
Special temperature requirements
OEM branding

FAQ

Q: Why choose double sphere over single sphere?
A: Double sphere joints provide higher movement capacity and better vibration isolation, ideal for HVAC thermal cycles.

Q: Why SS304 flanges instead of carbon steel?
A: SS304 offers superior corrosion resistance, especially in humid HVAC environments, reducing long-term maintenance.

Q: Is OEM or private labeling available?
A: Yes. OEM branding, labeling, and customized packaging are available for distributors and project clients.

Double Sphere Rubber Compensator Pipeline Expansion Joint for Vibration Absorber

Compensating for Thermal Expansion and Contraction: Rubber expansion joints compensate for thermal expansion and contraction caused by temperature variations in the pipeline. They prevent excessive stress on the pipeline system due to temperature changes, thereby protecting the pipes from damage.

Absorbing Vibrations and Impacts: Rubber expansion joints absorb stresses caused by vibrations and impacts in the pipeline system, reducing the transmission of vibrations and noise. This helps protect the pipeline and related equipment from damage.

Compensating for Pipe Movements: During installation and operation, pipeline systems may experience certain degrees of pipe movement. Rubber expansion joints compensate for these movements, ensuring the proper functioning of the pipeline system.

Leak Prevention: Rubber expansion joints provide sealing performance in pipeline systems, reducing the risk of leaks and ensuring the safe operation of the pipelines.
Double Sphere Rubber Compensator Pipeline Expansion Joint for Vibration Absorber

Ningjin NINGHAO Machinery Co.,Ltd. Founded on No November 19, 2010. It is located in No.2 taishan road, econnmic and technological development zone, ningjin county, dezhou city, shandong province. It covers an area of 120 acres, with more than 80 employees, among has all kinds of advanced production and inspection equipment.
We can offer all kinds of rubber expansion joints. Our products include: single ball flexible rubber expansion joint, double sphere rubber expansion joint, rubber-metal pipe connectors, thread-connection rubber expansion joint and tie rods set for rubber expansion joint. Rubber expansion joint main material: EPDM ,NBR ,NR, FR. The standard of the flange: ANSI150, DIN, JIS10K. The flange material: carbon steel, stainless steel, casting steel.
We have been in exporting for many years. We have wide business relations in the world. Now the main supply countries: Spain, Italy, Netherlands, Austria, French, Vietnam, India and many other countries. Our customers and clients all think highly of us.
Last, looks forward to the cooperation with you sincerely!