When I arrived at the office yesterday morning, an international parcel from Turkey arrived. It was sent by Colin. This guy didn't inform us in advance when he sent samples every time. I opened the package and found two hydraulic directional control valves, one complete and the other dissected. This is not the hydraulic directional control valve we shipped. After he goes to work, I will ask Colin about the situation.
After communication in the afternoon, it was learned that their hydraulic hammer was complained about by users after in use for about 8 months. The valve spool of the hydraulic directional control valve was worn and there was a leak, which caused abnormal function of the hammer. The manufacturer of this hydraulic directional control valve stated that based on the working pressure and frequency, it is normal that the service life of the valve spool is about 8 months. Colin can accept the explanation from the original hydraulic directional control valve manufacturer, but he wants a valve spool with a service life of more than 1 year, so he sent AAK the samples of the hydraulic directional control valves to check the possibility.
After knowing the specific working conditions, as well as the frequency of use of hydraulic crushing hammers, combined with the valve spool materials from the original manufacturer and processing accuracy, our engineer agreed that a service life of 8 months is indeed normal. Colin quickly understood what we meant, and immediately asked, what material will AAK use to produce hydraulic directional control valve spool? Can the service life of the valve spool be more than 1 year? I appreciate his quick response and responded with a smile: as long as the material selection and processing of the valve spool are in place, the service life of the hydraulic directional control valve spool will be worry free for more than 1 year.
We have a program for this hydraulic directional control valve, and we only need to customize the valve spool with attention to detail to meet Colin's requirements. Within 25 days, AAK delivered the test order for 80 hydraulic directional control valves. Colin comes to AAK every time he has difficulties, and has never been disappointed. Of course, he has also purchased many batches of other hydraulic directional control valves from AAK
This hydraulic directional control valve, AAK uses silicon nitride (Si3N4) ceramic ball valve spool, replacing the steel ball valve spool of the original hydraulic directional control valve manufacturer. In terms of parameter comparison, ceramic ball valve spool is superior to steel ball valve spool, but it is difficult to process and have high costs. Most hydraulic directional control valve manufacturers do not choose ceramic ball valve spools. The hardness of the ceramic ball valve spool is twice that of the steel ball spool, and it is wear-resistant with a small coefficient of friction. Its coefficient of thermal expansion is at least 30% lower than that of steel ball, which makes it more durable, even under high pressure and high frequency conditions, it is also safe. The corrosion-resistant, wear-resistant, and durable silicon nitride (Si3N4) ceramic ball valve spool is the most suitable for this hydraulic directional control valve. Although the cost of the valve spool is more than 3 times higher, AAK would rather spend more costs and reduce profits to ensure the service life of the hydraulic directional control valve. The customer has no complaint, in fact, AAK has also made a profit, because there are more re-orders.
AAK hydraulic directional control valve, valve spool is corrosion resistant, wear resistant, and durable. You can also give it a try!
AAK HYDRAULIC VALVES (605) 2023-06-13