AAK Hydraulic Directional Control Valve High Durability Spool

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.

https://www.aakindustry.com/info-detail/hydraulic-directional-control-valves-aak605