| Message: | Diego, from Spain, has been engaged in the procurement of hydraulic valves for 5 - 6 years, and has been successful. But the hydraulic cartridge needle valves purchased from a local manufacturer stumped him. At the beginning of last year, their company urgently purchased a batch of hydraulic needle valves to be installed on a batch of hydraulic equipment that customers urgently need. Diego purchased the hydraulic needle valves from a local manufacturer. 3 months after the equipment was sold, the customer complained that the equipment was unstable. After testing the hydraulic system, it was found that when the hydraulic needle valve spool was in the fully closed position, it was stuck radially, because the coaxiality deviation between the valve spool and the valve body was 2μm, 3μm, or 4μm. That is, the standard deviation is not up to standard. The original manufacturer of the hydraulic needle valves advised that this is an individual and can be replaced, but there are more and more complaints later. Diego knows that the coaxiality deviation must be completely solved. |
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