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Date/Time:  10/22/21 5:36 GMT

AAK Hydraulic Valve Block Without Iron Filings, Maarten admired!

Maarten purchased a batch of hydraulic valve blocks some time ago. In the early
test, the system parameters were normal. Strangely, 10 days after the hydraulic
valve block was started, the hydraulic oil in the system suddenly deteriorated.
The technician immediately suspended the operation of the whole test system.
After inspection, it was found that there were small iron filings in the
hydraulic oil, and the valve spool of the cartridge valve connected with the
hydraulic valve block also showed signs of wear. Maarten mentioned these
problems to the hydraulic valve manufacturer, but the hydraulic manufacturer
asked the customer to use better hydraulic oil and avoided the problem of his
own hydraulic valve block. With delivery date approaching, Maarten is very

Maarten really had no choice but to try to find other suitable hydraulic valve
manufacturers on the website to take over the hydraulic valve block order. He
consulted no less than 10 manufacturers in a week, but all manufacturers gave
the same reply, they could not 100% avoid fine iron filings. This made Maarten
start to doubt the ability of the hydraulic valve manufacturers in China.

Before, Maarten had a certain understanding about us AAK hydraulic valve
through some B2B websites, so with a try mentality, he directly emailed us a
trial order for 5 hydraulic valve blocks. After receiving our hydraulic valve
blocks, Maarten tested and compared, he found that AAK hydraulic valve block
has strong sealing, high precision and gloss finish. What's more, he was glad
that there was no iron filings residue. He immediately sent the drawings,
quantity, delivery date and other detailed requirements of the hydraulic valve
blocks currently being purchased from the other hydraulic valve manufacturer.
After confirming all details with us, he cancelled the order with the original
hydraulic valve manufacturer. At this moment, Maarten could finally rest

Why do more than 10 hydraulic valve manufacturers dare not accept the order of
this hydraulic valve block? Because this hydraulic valve block is very special.
There are many slender holes in the processing channels intersected by each
hydraulic valve block, and the cleaning of iron filings is a cumbersome
process. If there is no unique skill, it is difficult to eradicate it 100%. 2
years ago, AAK hydraulic valve also had an order cancelled by customer due to
the iron filings of hydraulic valve block not completely eradicated. After that
lesson, our technical team spent half a year innovating the production process
of hydraulic valve block, and finally AAK hydraulic valve was able to mass
produce the hydraulic valve without iron filings 1 year ago.

The reason why AAK hydraulic valve block can remove the residual iron filings
that can not be achieved by peers is that after the hydraulic valve block is
processed, AAK firstly uses high-temperature alkaline water to cook the
hydraulic valve block, so that the iron filings of the hydraulic valve block
lose demagnetization, and then uses a small pneumatic grinding wheel to clamp
the rotary file to go through the hole, so as to completely eliminate possible
flash at the corner. Then, the high-pressure washing machine shall carry out
high-pressure washing on the dirt on the inner and outer surfaces of the duct.
Finally, the industrial endoscope and cold light source shall be used to check
the flash and burr at the corner in the duct. If any, point-to-point and high-
pressure washing shall be carried out until the iron filings in the hydraulic
valve block are completely eradicated.

AAK hydraulic valve block is made with ingenuity. Don't worry about buying and
using. You can also try a small order.
AAK Hydraulic Valve Block Without Iron Filings, Maarten admired!
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SOURCE: Import-Export Bulletin Board (
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