AAK hydraulic relief valves with large flow was intact after 1 year

Patrick is from a Dutch hydraulic equipment manufacturing company. Since the
beginning of last year, the order of a high-precision and large flow hydraulic
relief valve has been tossed for more than half a year, and finally he had to
return to AAK to place the order.

At the beginning of last year, Patrick sent an inquiry for 30 hydraulic relief
valves. 3 days after AAK's quotation, Patrick placed the sample order, but
there was no reply after the hydraulic relief valve samples were sent. It was
not until the beginning of last month, that is, more than half a year later,
Patrick sent an e-mail asking whether each hydraulic relief valve in the
regular order could guarantee the same quality as the sample? I felt something
was wrong. After several rounds of e-mail communication, I learned that Patrick
gave the regular order to another hydraulic relief valve manufacturer, and the
price was more than 15% cheaper than AAK. However, after 8 months, the main
valve spools of some hydraulic relief valves were worn, resulting in loose
fitting of valve body holes and even grooves, resulting in failure to raise the
pressure of the equipment system.

According to the feedback of the original hydraulic valve manufacturer, this
hydraulic relief valve has large flow, high frequency of use, high accuracy of
valve hole, and wear is normal. 2 months later, more and more complaints were
received, but the original manufacturer surrendered and asked Patrick to source
other hydraulic relief valve manufacturers. Patrick was a little scared and had
to go back to AAK. Because the AAK hydraulic relief valves used in the original
design equipment has not been abnormal for more than 1 year, it would be better
to choose AAK even if the price is more expensive for 15%.

If the hydraulic relief valves with large flow need to have high accuracy and
be durable for more than 1 year, or more than 2 million times, the material
selection, processing and quality awareness are indispensable. For the
hydraulic valve manufacturers who can guarantee these 3 points at the same
time, you may not find a third one in Ningbo.

1.AAK has American high-precision CNC honing machine tools. The surface
roughness after honing is less than Ra0.8 and the cylindricity can reach
0.5μm. Axis straightness can reach 1μm. It is especially suitable for
finishing the valve hole of large flow hydraulic relief valves. The processing
aperture range is 5-500mm, and the depth diameter ratio can reach 10. For large
flow hydraulic relief valves with large aperture, most hydraulic valve
manufacturers can only reach 2-3μm.

2.According to the large flow rate of this model, after 2 weeks of comparative
testing, AAK has determined the German 20CrNi2MoV high-carbon bearing steel as
the main material of the valve body. Its high wear resistance and contact
fatigue resistance are 3 times that of other conventional steels, ensuring that
there is no wear for more than 1 year. Most hydraulic valve manufacturers
choose 12L14 free cutting steel.

3.AAK hydraulic valve has been supplied to 7 of the world's top 500
enterprises, and its quality awareness has been benchmarked with the
international first-line hydraulic valve brands.

AAK hydraulic relief valves, high precision, durable for more than 1 year, you
can also try a small order!

https://www.aakindustry.com/info-det , ail/hydraulic-relief-valves-aak317

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