Quality Issues....

To radiators, QUALITY means: effective at heat-exchange, constant performance, long life, easy assembly, safe transport...

Below we would like to discuss some items which will influence quality:

Fin height: At most situation, less distance between tubes will make radiators more efficiently, e.g., fin height at 8mm will better than fin height 9mm. On the other side, radiator with 9mm fins will save material than 8mm.

Thickness of Header: for big tanks, the header-plate will bear more pressure. Then, thickness of the header-plate are important. Normal 1.5mm thickness are not enough. The designer must notice this.

Radiator Tube: Usually, Al radiator use HF tube. ( high frequency welding tube). This tube includes 3 layers: 4343/3003/7072. The inside 7072 clad are very important to prevent the corrosion from water.

There are another kind of tube--extrude tube. This tube hasn't 4343 outside to help braze, none 7072 inside to anti-corrosion, but it's cheap. We found another problem from extrude tube are the hardness. It's weakly than the HF tube due to the process while the extrude tube are making.

Tank: Tanks are made from PA66 reinforced by glass fibre. Longer glass fibre helpful for the strength of tank. And good Nylon will provide necessary performance to anti frozen and high temperature. Recycle plastic has short fibre. If the recycle plastic mixed inside the tank, the Nylon are poor performance, and short fibre are helpless to the strength.

Ruble gasket: It must be EPDM. And it has to design in correct shape. Otherwise, The small components will influence the radiators' life.

Oil cooler: Since the cooper are very expensive, some tube oil cooler has changed to Al. In this case, if the fitting are still cooper, between cooper and Al may has electrochemistry reaction. The Al will lost very soon. That's the designer must attention to.

Package: stronger carton, are very important for long distance transport. And good print, will help the end clients like the products. 

TechRad are using 8mm fins, HF tube for its product, even it's expensive. All the process are under control. A lot of paper work has been done while a product is making. We think traditional process and material will bring constant quality and constant quality are the 1st important target.