Flexible Rubber Bellow expansion joints with Carbon Steel Flanges rubber joints

Our expansion joints:

Expansion rubber joints are assembled on the piping,which can reduce the vibration,reduce noise,protect pipe system from start-up forces as well as system surges,compensate movements and misalignments from the piping line.Reinforcement of the bellows is impregnated with nylon cords and hardened with steel wire rings at both ends.
Applications include, but are not limited to:
Commercial HVAC systems                                Advantages:
Industrial piping systems                                    Vibration isolation
Power plants                                                       Multiple elastomers available
Marine systems                                                   Small face-to-face dimensions
Sewage treatment plants                                    Single or multi-sphere configurations
Waste water systems                                          Reduces pipeline harmonics  

our production process quality control:

We treasure process quality control, there is very strict operation specification each process, which can ensure the goods quality:

1.    We use electronic weigher to weigh the weight of ingredients, the precision of weight is gram. So there is no surplus compounds elements;

2.    1.) By controlling material temperature and mixing time in the mixer machine, we can get qualified rubber mixed  composites.

      2) The calender process is the more critical phase, large steel rollers force rubber composites into smooth rubber sheets.

      3)The rubber sheets produced every day must be finished within the same day, we can ensure no rubber sheet remainder each day.

      4) All rubber sheets have passed the test of curometer.

3.  Adding adhesion agent in the mixture of rubber and nylon tire cord, then the rubber and nylon tire cord can be adhered together and turn into the integral. After vulcanization, all the rubbers are adhered tightly, it is very difficult to delaminate.

Below is the pictures of plastic sheet combined with rubber and nylon tire cord:

4. In wrapping process: all the elastomer constructions are made by hand-built and machine. After hand-builting, the underneath pressing roller moves along the elastomer body and compact the rubber sheets. There are two main functions of the roller, one is compacting the rubber sheets and making the rubber sheets more bonded, the other one is extruding air between rubber films. So it is very difficult to generate blisters and delamination after vulcanization.

5. After vulcanization, there are 4 inspection processes: first qualified products inspection, trimming, assembling process, inspection for finished goods, if the goods with blisters are found then scrap.

Our available goods:

Our certificates:

Our workshop:

Our Test instruments: 

Hot-ageing oven

Electronic Universal testing machine

hydrostatic test

Rotorless Vulcanizer

Low Temperature Testing Oven

Digital  density balance