For the hydraulic pressure reducing valves of airport equipment, it runs normally after using the EPDM sealing rings of AAK

The XX hydraulic manufacturing company in Germany has been rooted in the hydraulic system equipment of the airport for many years. A batch of hydraulic pressure reducing valves purchased by the novice Carla at the beginning of the year were repeatedly complained by the airport, which brought a lot of losses to the company's after-sales service and alerted the boss. In the first half of last year, Carla’s company sold hydraulic power units to Malaysia, which is used to supply emergency fuel to aircraft at the airport. The equipment was reported for repair after running for about a month. The after-sales engineer handled it at Kuala Lumpur Airport and locked the abnormality of the hydraulic pressure reducing valves according to the fault code. Finally, it was found that the sealing ring of the hydraulic pressure reducing valves was corroded, affecting the operation of the equipment.

The engineer asked Carla to mail the new sealing ring to the site within 2 weeks. The manufacturer of the original hydraulic pressure reducing valves learned that the sealing ring was seriously corroded and was willing to replace with fluororubber sealing rings, which have the best corrosion resistance, for free. The manufacturer also reminded Carla that when she placed the order, the medium used in the hydraulic pressure reducing valves was not specified, so the conventional nitrile rubber sealing rings were equipped. Considering that Carla is a novice, he is willing to offer replacements for free.

Carla thought that the abnormal hydraulic pressure reducing valves were solved in this way. Unexpectedly, the same problem occurred only two months after the replacement. The customer was angry and said that if the second after-sales service still couldn't solved the problem at one time, all the equipment would be returned. Carla went to the original manufacturer of hydraulic pressure reducing valves again, and the manufacturer gave up, because the fluororubber seal ring was their best choice. Now Carla was worried and had to turn to her purchasing director for help. The director asked her to contact AAK hydraulic valves first. If AAK still cannot solve it, there will be no need to waste time on Chinese hydraulic pressure reducing valve manufacturers and can only purchase from Germany.

After receiving the email, AAK replied that she should not worry. According to the drawing parameters of her hydraulic pressure reducing valve, it matches a hydraulic pressure reducing valve used in aircraft completely that AAK produced for a Russian customer reorder some time ago. We still have some quantity in stock, and can ensure that AAK hydraulic pressure reducing valves will not be reported for repair for at least one year. The next day, AAK sent 10 hydraulic pressure reducing valves to Kuala Lumpur Airport.

Carla emailed us a few days ago that after using AAK hydraulic pressure reducing valves, the equipment has been running smoothly for 6 months, while the ones from the original manufacturer were reported for repair in 2 months. She was surprised by the sealing ring of AAK hydraulic pressure reducing valves.

AAK can't be careless in details. Like the original manufacturer, not to check the use medium of the hydraulic pressure reducing valves, but ship order blindly, this is zero tolerance for AAK. The aircraft hydraulic system uses highly corrosive aviation blue oil. Even the fluororubber sealing ring considered as the best by most manufacturers is still not suitable for this medium. Three years ago, AAK tested for many times and found that EPDM seal ring is the most suitable for aviation blue oil medium. Its special molecular structure is highly chemically stable, especially the anti-aging property is several times that of fluorine rubber. This is also the reason why Russian customer has been reordering the hydraulic pressure reducing valves on aircraft from AAK.

AAK hydraulic pressure reducing valves have tips on sealing rings, which can be used in the airport. Peers can't think of it. You are welcome to give it a try!

AAK HYDRAULIC VALVES (201) 2022-04-19