AAK Hydraulic Flow Control Valve, 1 Year Life in High Temperature

Friedlich, from Wirth company in Germany, sold the drawworks of oil drilling
rigs to the Middle East at the beginning of last year. Six months later, the
customer complained that the disc brake controlled by the hydraulic cylinder of
the drawworks was weak, resulting in equipment shutdown. The reason was that
the hydraulic flow control valve in the hydraulic system was stuck. Friedlich
wondered that the same batch of drilling rigs and drawworks had been sold to
Canada, Central Europe and other markets for almost 1 year, and there was no
such abnormality. The original manufacturer of the hydraulic flow control
valves is not sure why it is stuck for half a year, but is willing to offer 30
hydraulic flow control valves for replacement and send them to the Middle East.
Friedlich was very worried about such solution without knowing the cause of the
stuck valve spool. Sure enough, a batch of hydraulic flow control valves had to
be replaced 6 months later. This frequent after-sales service not only costs a
lot, but also makes the customer dissatisfied. The boss asked Friedlich to
purchase new hydraulic flow control valves with high temperature resistance and
durability of more than 1 year as soon as possible to replace the current ones.

Friedlich found AAK on the Internet and left a message to us: why does the same
hydraulic flow control valves have twice the service life difference in
different working scenarios? I was puzzled when I saw this message. I learned
the above story after communication. Our engineer checked the drawing of
hydraulic flow control valve sent by Friedlich, and there was no problem from a
technical point of view. The probability is that the high temperature in the
Middle East and the high-frequency operation of the drawworks will lead to high
hydraulic oil temperature and thermal deformation of the valve sleeve, which
will reduce the matching clearance between the valve sleeve and the valve
spool, affecting the movement of the valve spool until the valve spool is
stuck. Friedlich learned that when the drawworks work, the oil temperature is
above 70 ℃, while the oil temperature of the normal hydraulic system is 30 ℃
-50 ℃. Friedlich seemed to agree with our analysis and asked AAK to send
samples of hydraulic flow control valves as soon as possible.

AAK engineers know that the core of this hydraulic flow control valve lies in
the material selection of the valve sleeve. It depends on the job of our full-
time material engineers. After 2 months' efforts, 6 kinds of materials were
tested, and a special hot work die steel was determined as the valve sleeve for
the hydraulic flow control valve. Its heat fatigue resistance and toughness
fully adapt to high-temperature hydraulic oil, and the hardness and wear
resistance of the material can also fully withstand the wear of more than 1
year. Eight months after the samples of AAK hydraulic flow control valves were
sent out, Friedlich informed us that there was no complaint of valve spool
jamming when AAK hydraulic flow control valves were used. I told him that
within 12 months, if there was a complaint of valve spool jamming, we would
refund all expenses.

AAK has a full-time Material Engineer in the selection of materials. He
connects with the materials research institute and university laboratories to
master new materials at the first time. He is specially responsible for
screening, comparison and testing, and matching suitable materials according to
the working conditions of the hydraulic valves, instead of general materials in
the market., In the selection of raw materials and spare parts, it is targeted
from the requirements of working conditions and never goes with the market
trend. Especially in the customization of hydraulic valves with high
requirements, there are unique methods and cases.

AAK hydraulic flow control valve, under high temperature, free of worry in 12
months, you can also have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-flow-control-valve-aak267

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