Kaden, a hydraulic valve purchaser from the United States, has been successfully purchasing hydraulic valves from China in recent years, and his boss also attaches great importance to him. Last month, at the original hydraulic valve manufacturer, he placed an order for a hydraulic valve block with multi-stage valve spool hole. The manufacturer confirmed that there was no problem and submitted the PPS of hydraulic valve block for 3 times, but the accuracy of valve spool hole was not approved every time. This made his customer very unhappy and thought it was a waste of his time. If the 4th hydraulic valve block sample still could not be approved, the order would have to be cancelled. The boss was also surprised and asked him to solve it within a time limit. Kaden felt unprecedented pressure. Kaden realized that the current hydraulic valve manufacturer must be replaced and contacted with no less than 10 hydraulic valve manufacturers. No factory has the ability to accept the order of this hydraulic valve block. Because the valve spool hole of this hydraulic valve block had a multi-stage structure, the accuracy was difficult to be controlled, the diameter tolerance of the valve spool hole of the hydraulic valve block was small, and there were many accuracy requirements such as coaxiality. Kaden was a little frustrated and seemed to have to give up. A hydraulic valve manufacturer in Ningbo told Kaden that the multi-stage valve spool hole must be processed with URMA reaming technology, and AAK hydraulic valve had this technology and could have a try. Kaden contacted us AAK hydraulic valve, directly indicating that he was introduced to us by a hydraulic valve factory, now he was in trouble with a special hydraulic valve block. He sent us the drawings and parameter requirements of the hydraulic valve block, and asked whether we were sure to be able to produce this hydraulic valve block. After analyzing the drawings, the technical team of AAK hydraulic valve told him that we would send the samples of hydraulic valve block directly to him for testing after 12 days. If the accuracy of hydraulic valve block met the requirements, we could produce it. Kaden requested that the PPS of the hydraulic valve block must be good so as not to completely disappoint his customer. On the 5th day after receiving the sample, he was very happy to inform us by email that after two tests by his company and his customer, AAK's hydraulic valve block met the requirements. He asked us to prepare materials and production can be started once other details are determined. AAK hydraulic valve URMA reaming technology adopts guide bar support to ensure correct tool position and rigorous cooling to ensure tool lubrication. Especially for multi-stage valve spool hole, or valve spool hole with small diameter, we have our own processing experience. This is rare in Ningbo hydraulic valve manufacturers.