AAK Hydraulic Solenoid Cartridge Valve is 20% more expensive, but has a service life twice of peers

Nelson comes from South Africa and purchases hydraulic solenoid cartridge valves from Ningbo. We have known each other for 2 years, but don't have much cooperation. Occasionally, there are only a few inquiries about hydraulic solenoid cartridge valves but without any results. Nelson advised that the price of AAK hydraulic solenoid cartridge valves is about 20% higher than that of solenoid valve peers in Ningbo. I listed how AAK's process ensured the manufacturing quality of hydraulic solenoid cartridge valves, but he did not respond. From the bottom of my heart, I have already given up on Nelson.

Last February, Nelson suddenly approached me and asked for an AAK sample of a hydraulic solenoid cartridge valve. I felt a bit strange. After communication, it was learned that they are developing a new hydraulic power unit.

AAK HYDRAULIC CARTRIDGE VALVES (551) 

https://www.aakindustry.com/info-detail/solenoid-cartridge-valves-aak551