| Message: | Forrest, from Spain, has been engaged in the procurement of hydraulic components for 3 years. At the beginning of the year, their customer asked for a set of hydraulic power units for military equipment, which had high requirements for hydraulic cartridge pressure control valves. The spool cylindricity was less than 0.0015, the roundness was less than 0.001, and the clearance between the valve spool and the valve cage was within 1μm. Forrest selected a manufacturer of hydraulic cartridge pressure control valves that has cooperated for 5 years to make samples. 2 weeks later, the manufacturer gave up. He was unable to process the valve spool, which has low efficiency and high scrap rate. Forrest contacted more than 10 other hydraulic cartridge valve manufacturers. They either had no reply or were only 60% confident. At this time, Forrest was worried. |
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