AAK Hydraulic Relief Valves Performance of 2 Million Times

Bauer has been working in K & G company in Brazil for 6 years. His boss always
trusts his work. Bauer and AAK have cooperated for 2 years. Two years ago, the
marketing of a hydraulic windlass developed by K & G company focused on the
selling point of "no repair in 1 year". However, 10 months after sales, some
users complained that the windlass could not rise when it was just started. The
problem lies in the leakage of the hydraulic relief valves. Per the
manufacturer, some hydraulic relief valves had deviation during assembly, he
was willing to replace the hydraulic relief valves for free. But after a few
months, the same problem continued. The boss was dissatisfied, and Bauer felt
the pressure and checked with other manufacturers of hydraulic relief valves,
but still no solution. Bauer began to worry.

Bauer emailed me to ask why the hydraulic relief valve leaks? This is a system
problem. I suggested that he send us the drawings of the hydraulic relief
valve, the hydraulic principle of the hydraulic windlass, and the actual
samples of the leaked hydraulic relief valve. Our engineer disassembled the
original hydraulic relief valves and found that the contact surface between the
poppet and the valve body was worn. The leakage was caused by the weak impact
resistance of the valve spool. I told Bauer that because the working condition
of this hydraulic windlass is a little special, it has high requirements for
the hydraulic relief valve, especially for the impact resistance of the valve
spool. The manufacturing quality of the original hydraulic valve manufacturer
is not poor, and the deficiency lies in the valve spool, which can be improved.
Bauer had no confidence in the original manufacturer and asked AAK to replenish
50 hydraulic relief valves. After 45 days, AAK sent out the hydraulic relief
valves and promised "no repair in 1 year".

Last week, Bauer informed AAK by e-mail that for those hydraulic windlasses
installed with AAK hydraulic relief valves, the customers no longer complained
about abnormal starting. Bauer admired AAK for not only finding the "cause" but
also fitting the right medicine to the case. He was relaxed and the boss was
satisfied. In fact, it is not how strong AAK is, but the inertia thinking of
many hydraulic valve manufacturers. They seldom consider the difference of
hydraulic working conditions when deciding which hydraulic components to fix.
AAK insists that every hydraulic relief valve is a new subject, from material
selection to production.

AAK uses 3Cr3Mo3W2V hot working die steel for this hydraulic relief valve
spool, its mechanical stress is unique among many steels. Its hardness,
strength and wear resistance are more than twice that of conventional valve
spool materials, and it also has good thermal fatigue stability and corrosion
resistance. Although it is difficult in the processing link, AAK still needs to
choose the most suitable steel, even if the processing cost is 2-3 times
higher. Because AAK can't make things that are not good enough, let alone
supply them to consumers. Only in this way can we ensure that the hydraulic
relief valve will not be impacted and eroded under special working conditions,
and ensure the performance of 2 million times.

AAK hydraulic relief valve, with a performance of 2 million times long service
life, welcome to have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-relief-valves-aak343

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