| Message: | Samuel is from OLEODINAMICA REVA SRL company in Italy. He has purchased a non-standard hydraulic relief valve from AAK for 2 years, and re-peat the orders 3 – 4 times every year. He didn't expect that in order to save 20% of the cost, the hydraulic relief valves purchased from a new manufacturer was complained by customer for insufficient power within only half a year. This hydraulic relief valve is used in the top 3 hydraulic power unit they sell. There have been no complaints in the past 2 years. The root cause of insufficient power is that the main valve element of the hydraulic relief valve is stuck, causing the pressure oil output by the hydraulic pump to overflow back to the oil tank, affecting the power.
Samuel contacted the new manufacturer of the hydraulic pressure relief valves. The manufacturer replied that they can only guarantee the service life of more than half a year for 450bar high-pressure working condition and high-frequency use hydraulic relief valves. This hydraulic relief valve is benchmarked to German HAWE. Perhaps only HAWE high-pressure hydraulic relief valve has a service life of more than 2 years. The hydraulic relief valves produced by the new manufacturer have only half a year of service life, and Samuel felt helpless.
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