| Message: | Last week, the German customer Thorsten sent an order for 1,200 hydraulic counterbalance valves, and said that only AAK and SUN hydraulic counterbalance valves passed 1 million durability tests among the 6 hydraulic valve manufacturers making the samples. However, the price of AAK was 30% lower than that of SUN, and the delivery time was faster.
In May this year, Thorsten’s company received an order for a batch of special hydraulic winches. The customer requested that the equipment be guaranteed for at least 1 year of service life. The engineer required that the durability test of the hydraulic counterbalance valve to be purchased by Thorsten must reach more than 1 million times. Thorsten found a local hydraulic counterbalance valve manufacturer to carry out the test. After 100,000 times, the O-ring wear affected the seal. After the sealing ring was replaced, the valve spool and valve body were worn and leaked again after 200,000 times, and the local manufacturer surrendered.
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