AAK Hydraulic Directional Control Valve, free of rust and corrosion

AAK hydraulic directional control valve, which has been used for 2 years, is
free of rust and corrosion. It stands out from 3 hydraulic valve manufacturers.
Joseph finally received a large order for 1000 hydraulic directional control
valves from customer.

Joseph is the purchasing manager of a hydraulic pump company in Italy. Two
years ago, the company received a test order for a special chemical hydraulic
pump, which needs a hydraulic direction control valve. The customer requires
that after 2 years, if the hydraulic directional control valve is free of rust
and corrosion, it will have the opportunity to obtain a large order. The boss
asked Joseph to find a very professional hydraulic valve manufacturer.

Joseph knew that relying only on the existing hydraulic valve suppliers is not
enough to guarantee the quality. He checked with all the hydraulic valve
manufacturers he had contacted before and the new ones searched online, and
selected 16 hydraulic valve factories, including AAK Hydraulic Valve. He asked
all hydraulic valve manufacturers to provide 2 samples of hydraulic directional
control valves according to the drawing requirements of the customer for
testing at their headquarters.

According to the post analysis to the drawing of hydraulic directional control
valve from Joseph, we found that there is no problem to meet the accuracy,
sensitivity and durability of this hydraulic directional control valve, except
that the finish of the outer surface of the hydraulic directional control valve
must be free of abnormality, rust and corrosion after 2 years of use, which is
too uncertain.

We didn't receive email from Joseph until 15 days after we sent out the
hydraulic directional control valve samples. According to their simulation
test, only the hydraulic directional control valves from 3 factories can be
approved to send samples to their customer. It would take 2 years for AAK to
know if we can get the order of hydraulic directional control valve. At that
time, we were very surprised that there were such strange customers.

We almost forgot the test order of this hydraulic directional control valve 2
years ago. Last week, Joseph sent an email asking about the production time and
new price of 1000 hydraulic directional control valves, and told us that the
surface of the hydraulic directional control valves from other two hydraulic
valve manufacturers began to have scratches, corrosion, fading and rust after
more than a year of use, only the surface gloss of AAK hydraulic direction
control valve does not change.

In fact, when we sent out the hydraulic directional control valve samples, we
were not 100% sure to meet this special requirement, because we used a new
process to proofing. We know that the conventional nickel plating, chromium
plating, zinc plating, blackening and other processes basically can not keep
the same appearance after 2 years of use. We adopted electroless nickel
plating. The principle of this process is to generate a coating on the metal
surface by solution chemical reduction reaction, and the coating is amorphous.
After treatment, the surface of the metal is smooth, corrosion-resistant and
wear-resistant, and the coating film has few pores and uniform thickness. At
the same time, the hardness of the heat treatment can reach HRC70.

After confirming the order, Joseph privately reminded us several times that the
surface finish treatment of large goods should be careful. His boss said that
after this order was shipped smoothly, there would be more and more inquiries
later, and his salary was raised by 2 levels.

AAK hydraulic directional control valve is rust free and corrosion free. It is
still the same as the new one after being used for 2 years. Welcome to have a
small try!

https://www.aakindustry.com/info-detai , l/hydraulic-directional-control-valves-
aak135

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