AAK Hydraulic Cartridge Directional Control Valve of High Stability

Alex, an old friend from Brazil who has worked with AAK for 5 years, sent me an
email last month, asking me to help his new colleague Marvin to make samples
for a hydraulic cartridge directional control valve and to work overtime
urgently. It was learned that Marvin just joined the industry for half a year.
The coaxiality accuracy of the hydraulic cartridge directional control valve
purchased by Marvin from the local cartridge valve manufacturer in Brazil was
not up to the standard, which led to the customer's complaint about the
unstable operation of the hydraulic winch. Their engineer detected that the
coaxiality error of the hydraulic cartridge directional control valve was
0.004mm, which caused the pressure in the fitting gap between the valve hole
and the valve spool to be unbalanced, it must be replaced, but the original
manufacturer gave up. The customer has been pushing for progress. Marvin has no
direction, so he asked Alex to help.

According to the drawing of the hydraulic cartridge directional control valve
sent by Marvin, although it is difficult for the coaxiality error to be less
than 0.002mm, our engineers have the means and are willing to work overtime to
deal with it. AAK treats regular customers with the green light as much as
possible. After 25 days, 12 samples of hydraulic cartridge directional control
valves were sent out.

Last week, Marvin emailed that AAK hydraulic cartridge directional control
valves had been installed on several abnormal hydraulic winches, and the
customer was satisfied with his after-sales service. He was asking the boss
whether he needed to replace all the hydraulic cartridge directional control
valves in this batch of hydraulic winches, and asked me to ensure the stability
of the quality. I told him that for this model, AAK quality may not be the
best, but the most stable. There would be no cases that the coaxiality error
is 0.004mm for one moment, the fitting clearance between valve hole and valve
spool is 0.002mm for another moment. There would not be the case that the
fitting clearance between valve hole and valve spool, is big or small.

AAK hydraulic cartridge directional control valve, stable coaxiality error, and
stable sealing of valve body and valve spool, fundamentally ensure the working
stability of the hydraulic winch, which mainly comes from 3 aspects:

1. Technically, the machining process of the valve hole of the hydraulic
cartridge directional control valve adopts 6 procedures, including drilling,
rough boring, semi fine boring, fine boring, reaming and honing. Most cartridge
valve manufacturers do not have semi fine boring procedure, and only 5
procedures.

2. On the equipment, the valve hole is processed by the horizontal machining
center imported from Japan, which is mainly used for military products
processing. At the same time, diamond reamers are equipped for reaming to
ensure the surface roughness, cylindricity and roundness error of the valve
hole. These precision parameters are controllable and stable.

3. In terms of detection, the improved CMM is used to check, and the coaxiality
error is strictly controlled within 0.002mm.

AAK hydraulic cartridge directional control valve is reliable, and you can also
have a small try!

https://www.aakindustry.com/info-detai , l/cartridge-directional-control-valves-
aak420

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