AAK Hydraulic valve block Ra0.4um does not leak, Malcolm admired!

Malcolm is a purchaser from an American hydraulic equipment manufacturer. He
has purchased various hydraulic valves from AAK for some years. We know each
other very well. At the beginning of the year before last, their company
received an urgent order from a customer in South America. The company required
that the accessories of the whole hydraulic system must be in place within 20
days. AAK is their long-term supplier of hydraulic valve blocks. Malcolm
estimates that if the hydraulic valve blocks are purchased from AAK this time,
including the transportation and customs clearance time, it will be over 20
days. AAK is only required to offer the quotation according to the hydraulic
valve block drawings for their file and is informed that due to time
constraints, they will first purchase the hydraulic valve blocks from the local
hydraulic valve manufacturer this time.

About 8 months after our quotation, Malcolm asked by email about what is the
reason for the leakage of the hydraulic valve blocks. I asked jokingly if
leakage happened in the hydraulic valve blocks purchased locally last time. He
said that the customer initially complained that about 30% of the hydraulic
valve blocks were leaking. The local manufacturer also replaced the bad
hydraulic valve blocks with new ones. However, 3-4 months after installation,
the customer reported that there was leakage fault of the hydraulic valve
blocks again. Now the customer is not satisfied with the stability of the
hydraulic valve blocks and needs the leakage problem of the hydraulic valve
blocks solved at one time. The trouble is that the local hydraulic valve
manufacturer in the United States does not cooperate to replace the hydraulic
valve blocks again.

We replied that if we simply look at the leakage cause of the hydraulic valve
block, the probability is that the surface roughness of the hydraulic valve
block is not up to standard, or the roughness Ra value of the hydraulic valve
block is unstable. According to the requirements of these working conditions of
your hydraulic equipment, if the Ra value is stable at 0.4um, the problem of
hydraulic valve block leakage will not occur.

10 days later, AAK sent 12 samples of hydraulic valve blocks for emergency
first. After 20 days, the remaining 30% of the hydraulic valve block was sent
from AAK. Now, 12 months have passed, and no complaint from customer. Malcolm
mentioned 2 days ago that the customer was ready to place an order again. This
time, his boss said that no matter how urgent it was, it was necessary to
purchase from AAK, because AAK hydraulic valve block was the most trustworthy,
and the boss would communicate with the customer about the delivery date.

Why can AAK achieve the surface roughness Ra value of hydraulic valve block to
0.4um?

First of all, the Ra value of the hydraulic valve is the cornerstone. The
coarser the surface, the easier it is to wear. The intermediate gap gradually
increases during use, which ultimately affects the sealing effect of the
hydraulic valve block and the service life of the hydraulic system. Secondly, a
small Ra value is the key and the focus of operation. After processing the
hydraulic valve block, AAK will focus on the detection of Ra value and use
TYLYROND® 500 Pro Series ultra-high precision profile measuring instrument, the
most high-end in the world, from British Taylor Hopson company, ensure the
measurement accuracy and stability of Ra value more than similar instruments.
The Talym sensor, has an industry leading measurement range of 4mm, and the
measurement resolution is 16nm-0.3nm, which can measure in any attitude,
whether horizontal or vertical, and the measuring force remains unchanged.
Thus, the surface roughness of each hydraulic valve block can be accurately,
stably and efficiently tested.

AAK hydraulic valve block, is ingeniously operated and processed, tested by
high-end testing equipment. Our American customer has replaced his local
original manufacturer in the United States with AAK. You can also have a small
try!

https://www.aakindustry.com/info-d , etail/hydraulic-valve-blocks-aak150

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