AAK Hydraulic Cartridge Pressure Control Valve for Coal Mining

Nijenhuis is from a hydraulic equipment company in the Netherlands and has been
in the company for 8 years. 2 years ago, they sold a batch of hydraulic
supports for coal mining. 3 months later, they were complained that the support
was unable to rise. The technical team was surprised. The after sales personnel
was shocked by the coal mining site condition, with long oil pipes, many
sockets and poor dust prevention. There were pulverized coal, rock particles
and iron filings at the bottom of hydraulic column cylinder and valve chamber.
The after sales personnel saw the site and knew that the wear of the hydraulic
cartridge pressure control valves had caused the leakage. The after sales
personnel recommended that the customer improve the working environment and
replace the hydraulic cartridge pressure control valves. This time, their
engineer increased the filtration accuracy of the system, but the newly
installed hydraulic cartridge pressure control valves went on strike again 5
months later. Their engineers blamed Nijenhuis for the poor wear resistance of
the hydraulic cartridge pressure control valves purchased. Nijenhuis was
helpless.

The original manufacturer of the hydraulic cartridge pressure control valves
said that most hydraulic valve manufacturers can only guarantee the service
life of 3-6 months under such working conditions. Nijenhuis did not believe it
and began to find new hydraulic valve manufacturers. A week later, more than 20
manufacturers of hydraulic cartridge pressure control valves were contacted
online and offline, and the response was similar to that of the original
manufacturer. Nijenhuis contacted me under the introduction of an old Dutch
customer. When I saw the working video of the hydraulic support and the coal
mining scene, I was not sure how long the life of the AAK hydraulic cartridge
pressure control valves would be under that working condition. Nijenhuis seemed
disappointed, thinking that AAK had no advantage over other hydraulic valve
manufacturers.

3 days later, I told Nijenhuis that AAK could redesign this hydraulic cartridge
pressure control valve and guarantee that it would be safe for more than 1
year. Nijenhuis probably thought I was fooling him, so he didn't reply to the
email and I didn't follow up. 1 month later, Nijenhuis came to me again and
asked about the probability of success. When he learned that AAK is 90%
confident, it seemed that he saw hope again.

After 50 days, AAK sent 30 samples of redesigned hydraulic cartridge pressure
control valves. Last week, Nijenhuis sent an email saying that it has been 10
months since he used AAK hydraulic cartridge pressure control valves. The
customer did not complain that the hydraulic support was unable to rise. Their
engineers admired our little trick.

For the design of hydraulic cartridge pressure control valve, AAK aims to solve
the customer's pain points – working condition, while most hydraulic valve
manufacturers only copy the standard parts. The working condition of the
hydraulic support is special, and it is difficult to avoid coal dust, rock
particles and iron filings. However, once these materials enter the hydraulic
cartridge pressure control valve, any material can not resist wear for more
than 1 year. Since the working environment cannot be improved, can it be
isolated locally? AAK's little trick is that between the valve spool and the
valve seat, there is a sealing pair as the support, and the contact surface of
the sealing pair is consistent. Of course, the accuracy control here is the
core, which most hydraulic valve manufacturers cannot achieve. The intervention
of the sealing pair can not only isolate the pollution, but also reduce the
friction between the valve spool and the valve seat, thus ensuring the service
life of the hydraulic cartridge pressure control valves for more than 1 year.

The service life of AAK hydraulic cartridge pressure control valve is 2-3 times
that of its peers. You can also try one small order!

https://www.aakindustry.com/info-det , ail/cartridge-pressure-control-valves-
aak356

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