AAK Hydraulic Pressure control Valve can be used at 450bar high pressure

William is a purchaser of a hydraulic equipment company in the United States.
At the beginning of last year, a South American customer wanted to customize a
drilling machine for geological exploration. The South American customer
promised to order this equipment for a long time if it has excellent
performance and stability. The boss asked the engineers to design and test
samples. According to the working conditions, the maximum pressure of the
hydraulic system is 450bar or above, which has a very high requirement on the
pressure resistance and stability of the hydraulic pilot operated pressure
control valves.

When William received the task of purchasing this hydraulic pilot operated
pressure control valve, he felt a big pressure, because the pressure resistance
of normal hydraulic pilot operated pressure control valve is basically 250bar,
and the maximum pressure resistance provided by previous hydraulic valve
manufacturers was also only 380bar. He asked all the hydraulic valve
manufacturers that he contacted before, they basically replied that according
to this working condition, their hydraulic pilot operated pressure control
valve can only ensure a service life of 3 months, but the customer asked for a
service life of 1 year.

William also contacted the local hydraulic valve manufacturers in the United
States. They told him that he could not promise a service life of 1 year for
this hydraulic pilot operated pressure control valve. They can only test the
samples first, then to know the service life. One of his other hydraulic valve
manufacturers in China introduced AAK to him. He told William that AAK shipped
a hydraulic pilot operated pressure control valve for a working condition of
maximum pressure 450bar before, but the service life required by that customer
is 6 months.

After receiving the drawings of the hydraulic pilot operated pressure control
valve from William, AAK technical team found that the requirements of this
hydraulic pilot operated pressure control valve were higher than those of our
last shipment. The conventional No. 45 steel could not meet the requirements,
so we had to find special steel. Later, after 5 times of material selection and
testing, 2 months later, AAK internal sample testing was successful by using a
German steel with high wear resistance and high fatigue resistance. After
sending the samples of hydraulic pilot operated pressure control valve, we have
been waiting for news from William. William said that no news from customer is
the best news.

Last month, 1 year after AAK samples were sent, William emailed us that he
would order 100 hydraulic pilot operated pressure control valves at one time.
The quality standard is the same as that of the hydraulic pilot operated
pressure control valves sent last year. Because the other hydraulic valve
manufacturers in China can only ensure the service life of 3 months, he did not
request those manufacturers to make samples, but only asked a hydraulic valve
manufacturer in the United States and AAK hydraulic valve to make samples for
this hydraulic pilot operated pressure control valve at the same time.

The test result from their customer is that the samples of hydraulic pilot
operated pressure control valves provided by the hydraulic valve manufacturer
in the United States needed to be treated after being used for 12 months, while
the condition of AAK sample is still normal after 1 year. Therefore, they
choose AAK as the supplier for this hydraulic pilot operated pressure control
valve and think it is difficult to find a second one

The core of this hydraulic pilot operated pressure control valve is material
and heat treatment. AAK adopts 20CrNi2MoV high carburizing bearing steel
imported from Germany, combined with carburizing pretreatment process, through
secondary quenching + cryogenic treatment + low temperature tempering process,
which is cooled to 650 ~ 700 ℃ and discharged after cooling to 450 ~ 500 ℃.
The micro hardness is 237 ~ 247 HV, and its wear resistance and contact fatigue
performance are increased by more than 3 times.

AAK customized hydraulic pilot operated pressure control valve, is suitable for
high pressure working condition and durable, welcome to have a small try!

https://www.aakindustry.com/info-detai , l/pressure-control-valves-aak143

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