AAK uses Rockwell hardness tester to check the hardness of each part of the hydraulic valve, so that the hardness of each heat-treated alloy steel is "exposed". Nearly 90% of domestic hydraulic valve manufacturers are not equipped with this Rockwell hardness tester with the highest accuracy. An Italian hydraulic valve customer, who disliked the expensive price of AAK, purchased the high hardness hydraulic directional valves from another hydraulic valve manufacturer but suffered loss from poor quality, he finally returned to AAK to place an order.
AAK has been engaged in the hydraulic valve industry for so many years, wholeheartedly pursuing product quality and checking step by step from material selection. In terms of hardness index, it not only has its own exclusive heat treatment plant, but also has its own exclusive quenching and tempering heat treatment process.
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