Product Description

Standard Specification

Key Features & Highlights

Main Products

Packaging & Logistics

FAQ

Component Parts

NHFLEX-C TYPE Rubber Joint Size Chart

Name: Vibration Absorption Rubber Metal Pipe Connector
Brand: Ninghao
Rating: 5.0 (52 reviews)

In industrial piping systems, vibration is rarely dramatic—but it is relentless.
A pump starts, a motor runs, fluid flows, and subtle oscillations begin to travel through rigid pipes. At first, it’s only a low hum. Over time, that vibration becomes loosened bolts, cracked welds, noise complaints, and unexpected downtime.

The Vibration Absorption Rubber Metal Pipe Connector was created to stop that process at its source.

When you handle the connector, the balance is immediately noticeable. The rubber body feels dense yet resilient, designed to flex without collapsing. The integrated metal components give it weight and confidence—this is not a soft sleeve, but a controlled mechanical buffer. Once installed, it quietly changes how the system behaves. Vibrations are absorbed before they reach the structure. Harsh mechanical noise softens. Equipment feels steadier, less stressed, more predictable.

This connector doesn’t announce its presence. It simply makes the entire system feel calmer, extending equipment life while improving the working environment around it.

High Duty Rubber Metal Pipe Joint for Movement Compensator

Structural:

Cylindrical rubber body with vulcanized flange to the flange holes (The cylindrical body: EPDM elastomer + 2pc flanged inserts). The rubber-metal pipe connector is self-sealing, so that no additional seals required.

Item	Part	Material
1	Body	NR, EPDM, NBR
2	Flange	Cast Steel

SIZE	LENGTH	DIN PN10			L1
DN	F/F	D	D1	n-M
(mm)	(mm)	(mm)	(mm)		(mm)
20	70	109	75	4 X M12	12
25	70	119	85	4 X M12	16
32	70	145	100	4 X M16	16
40	70	156	110	4 X M16	16
50	70	171	125	4 X M16	16
65	70	192	145	4 X M16	16
80	70	207	160	8 X M16	18
100	70	227	180	8 X M16	18
125	70	257	210	8 X M16	18
150	70	294	240	8 X M20	18
200	90	343	295	8 X M20	20

* Stable pipeline fixed points and proper pipeline are required to absorb axial forces.
The rubber metal pipes are installed free of tension.
The mounting length should be 70mm, do not load on train, twist or bend position.
The installation should be in an easily accessible location where maintenance and inspection of the system is easy to do.
Additional seals are not required, since rubber protrudes at the sealing surface.
Keep the joint away from heat sources such as welding machines or sun light.

Do not assemble the joint directly in touch with rubber surface or other fitting.

Each feature is designed to solve a real system problem:

High-Efficiency Vibration Absorption
Elastic rubber structure absorbs axial, lateral, and angular vibration, preventing stress transfer.
Metal-Reinforced Stability
Integrated metal components maintain shape under pressure, avoiding over-deformation.
Reduced Noise Transmission
Interrupts structure-borne vibration paths, significantly lowering mechanical noise.
Material Durability
Rubber compounds resist aging, moisture, and temperature variation in long-term service.
System Protection
Reduces fatigue damage to pumps, valves, flanges, and pipe supports.

High Duty Rubber Metal Pipe Joint for Movement Compensator

To ensure that every Vibration Absorption Rubber Metal Pipe Connector arrives in perfect condition, we pay close attention to packaging integrity and logistics coordination from the moment the product leaves our production line.

Each connector is first individually protected to prevent surface damage, deformation, or contamination during handling. The rubber body is carefully separated from direct metal-to-metal contact, reducing the risk of abrasion or compression during transit. For larger sizes or bulk orders, reinforced packaging is applied to maintain shape stability and structural safety.

Packaging Options Include:

Individual plastic wrapping to protect rubber surfaces
Foam or spacer protection for flanges and metal parts
Strong export-grade cartons for small and medium sizes
Wooden cases or pallets for heavy or oversized connectors
Customized packaging according to customer requirements

From a logistics perspective, we work closely with experienced freight partners to support sea freight, air freight, and multimodal transportation. Packaging is optimized to improve loading efficiency, reduce unnecessary volume, and lower overall shipping risk. Clear labeling and documentation are provided to ensure smooth customs clearance and easy identification upon arrival.

Whether for urgent replacement orders or large-scale project deliveries, our packaging and logistics solutions are designed to give customers confidence that the product they receive performs exactly as intended—before it is even installed.

Max.Working Pressure

Operating Temperature

-20ºC-100ºC

Applicable Media

Sea Water, Drinking Water, etc.

Flange Standard

DIN PN10 PN16

Q1: How effective is this connector in reducing vibration?
A: It absorbs vibration at the connection point, preventing transmission to pipelines and structures, significantly reducing long-term fatigue.

Q2: What makes rubber-metal connectors better than rigid connections?
A: Rigid connections transfer stress directly, while rubber-metal connectors absorb and dissipate it safely.

Q3: Can this connector operate continuously?
A: Yes. It is designed for continuous industrial operation under stable pressure and temperature ranges.

Q4: Is it suitable for HVAC systems?
A: Absolutely. It is widely used in chilled water and heating systems for vibration isolation.

Q5: Do you offer customization?
A: Yes. We support customized sizes, materials, and flange standards based on project requirements.

Adapting to Temperature Fluctuations
Rubber expansion joints are designed to accommodate dimensional changes in pipelines caused by rising or falling temperatures. By allowing controlled movement, they help relieve internal stress generated by thermal expansion or contraction, effectively reducing the risk of pipe deformation or structural fatigue.

Reducing Vibration and Mechanical Shock
In operating pipeline systems, continuous vibration and occasional mechanical impacts are unavoidable. Rubber expansion joints act as a flexible buffer, absorbing these dynamic forces and limiting the transfer of vibration and noise, which helps safeguard both the piping network and connected equipment.

Allowing for Pipe Displacement
During installation or long-term operation, pipelines may shift due to alignment tolerances, foundation settlement, or system movement. Rubber expansion joints are capable of accommodating such displacement, ensuring stable performance without compromising system integrity.

Enhancing Sealing and Leak Protection
By maintaining a tight and flexible seal under varying operating conditions, rubber expansion joints significantly reduce the likelihood of leakage. This contributes to safer pipeline operation and improved system reliability over time.

High Duty Rubber Metal Pipe Joint for Movement Compensator

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!