| Message: | Philip comes from a hydraulic equipment company in Italy. He has purchased hydraulic pressure reducing valves in China for several years. He is also an old customer of AAK. At the beginning of last month, Philip emailed that there was a problem with the hydraulic pressure reducing valves he purchased elsewhere at the beginning of last year, and the company had to pay a lot of money after sales. The boss had big disagree opinion on him. After further communication, we learned that in order to reduce the purchase cost by 17%, he did not choose AAK and purchased hydraulic pressure reducing valves from another factory.
The crane sold by Philip’s company suddenly increased the load of variable displacement pump during operation, resulting in the control failure of the whole hydraulic system. Under normal circumstances, the hydraulic pressure reducing valve of the variable displacement pump as the emergency safety valve is in the normally closed state. This time, the pressure of the variable displacement pump cannot be released due to the jamming of the hydraulic pressure reducing valves, resulting in the collapse of the system. The customer requests to replace the hydraulic pressure reducing valves on the equipment and compensate the cost of work delay on the construction site.
Philip asked the original manufacturer to replace the hydraulic pressure reducing valves. The manufacturer said that the hydraulic pressure reducing valves have been used for more than half a year. The problem of the valve spool sticking is caused by sundries in the hydraulic oil used by the user. At present, this model of hydraulic pressure reducing valves is not in stock, and it will take at least more than a month to re produce. I asked Philip to send me the model and parameters of this style of hydraulic pressure reducing valves. After analysis, AAK engineers found that the hydraulic pressure reducing valves needed by Philip was exactly the same as that ordered by one of our Russian customers last time. We have it in stock. |
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