5 years ago, AAK hydraulic pressure valves started to use 100% Korean piano steel wire as the pressure spring of hydraulic valves, while only a few hydraulic valve manufacturers in Ningbo were using it. Russian customer Natalia placed an order 3 months after receiving our hydraulic pressure valve samples. Finally, AAK HYDRAULIC VALVE became Natalia's only hydraulic valve supplier in Ningbo.
Most hydraulic valve manufacturers use carbon steel, which is cheap and widely used, as the valve spool of hydraulic valves. This pressure spring has good hardness, but its plasticity and toughness are very general, its tensile strength is relatively weak and its stability is difficult to control. After the hydraulic pressure valves being used for a period of time, the pressure may not be adjustable.
Natalia, a Russian customer, purchased hydraulic pressure valves from Ningbo last year. There was a problem with the automatic pressure regulation.
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