AAK hydraulic threaded cartridge valve with IT7 ~ 4 valve hole accuracy

When back from the Spring Festival, we received a reorder for 120 hydraulic
threaded cartridge valves from Echerle company. Dean has been engaged in
hydraulic parts purchasing in Echerle company for many years, and has been
doing very well. The boss also trusts him. At the beginning of last year, the
company developed a new hydraulic power unit, which has high requirements for
the accuracy of the hydraulic threaded cartridge valve to be used. Because of
the high accuracy requirement, the original hydraulic threaded cartridge valve
manufacturer said that he was not able to achieve it. Dean used a new hydraulic
threaded cartridge valve manufacturer finally. After their hydraulic power unit
equipment has been sold for just less than 3 months, the customer complained
about insufficient power supply. Their engineers believe that the hydraulic
threaded cartridge valve was stuck and caused the problem. However, the
hydraulic threaded cartridge valve manufacturer believes that it is caused by
the uncleanness of hydraulic oil, but the engineer detected that the hydraulic
oil is normal.

The boss was not satisfied with such a hydraulic threaded cartridge valve
manufacturer and asked dean to find a new hydraulic valve manufacturer and
replenish goods as soon as possible. Dean left a message on AAK website and
asked, what are the reasons for the stuck of the hydraulic threaded cartridge
valve? We estimated that he had encountered the complaint about the stuck of
hydraulic threaded cartridge valve. After communication, we learned that he was
cheated by the new hydraulic valve manufacturer.

According to the hydraulic threaded cartridge valve drawings sent by him, the
accuracy requirements are high, especially the dimensional accuracy requirement
of the valve hole is IT7 ~ 4. Among the hydraulic valve manufacturers in
Ningbo, there may be no more than 3 factories that are able to meet it. We
suggested Dean send the abnormal hydraulic threaded cartridge valve to us.
After receiving and disassembling the sample, it was found that the
cylindricity and coaxiality of the valve hole of the hydraulic threaded
cartridge valve had errors, that is, the accuracy was not enough, the pressure
in the matching gap between the valve hole and the valve spool is not balanced,
resulting in the limited flexibility and easy stagnation of the valve spool in
the valve body.

Dean asked whether we can produce hydraulic threaded cartridge valves meeting
valve hole accuracy requirements of IT7 ~ 4? We told Dean that for the
hydraulic threaded cartridge valve, the valve hole accuracy is the key point
and also the difficulty of quality control process. It directly affects the
working performance, service life and stability of the hydraulic threaded
cartridge valve. General hydraulic valve manufacturers surrender to this
accuracy. AAK has a precision honing machine imported from the United States,
which guarantees the finishing of the valve hole of the hydraulic thread
cartridge valve, and has the special machine operated by a specially assigned
person. After honing, the dimensional accuracy of the valve hole of the
hydraulic threaded cartridge valve is IT7 ~ 4, and the surface roughness can
reach Ra0.32 ~ 0.04 microns.

Dean first placed a test order of 10 hydraulic threaded cartridge valves to
solve customer complaints. After 30 days, Dean informed us by email that their
engineer was very satisfied with all the data detected from AAK hydraulic
threaded cartridge valve, especially the accuracy of valve hole. After
installing AAK hydraulic threaded cartridge valve, the hydraulic power unit
restored. If there is no any problem after being used for 3 months, they will
place another order for 120 hydraulic threaded cartridge valves.

AAK hydraulic threaded cartridge valve, the valve hole accuracy is praised by
the customer's engineers, and you can also give it a try.

https://www.aakindustry.com/info-detai , l/hydraulic-threaded-cartridge-valves-
aak151

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