AAK Hydraulic Cartridge Counterbalance Valve 3 highlights

Camden is from a hydraulic equipment company in Sweden and has been engaged in
procurement for 2 years. One of their customers ordered 2 sets of customized
hydraulic power units, and specially reminded that the working environment of
the equipment is 20 ℃ below zero. The hydraulic power unit is required to be
durable for at least 1 year, and its stability should be the first. Their
engineer suggested purchasing SUN hydraulic cartridge counterbalance valves,
but the parameters of SUN standard parts could not fully meet the requirements
of equipment working conditions, and there is no enough quantity and time to
customize SUN hydraulic cartridge counterbalance valves. Camden contacted a
local manufacturer of hydraulic cartridge counterbalance valves, and the
manufacturer was willing and confident to sample. 3 months later, the customer
complained that the equipment was not stable enough, but it was barely usable.
6 months later, the equipment went on strike. During after sales service
checking, it was found that the control of the hydraulic cartridge
counterbalance valve was abnormal. The original manufacturer was surprised and
confused. After disassembling the hydraulic cartridge counterbalance valve, it
was found that the installation torque was too large, which could easily cause
the valve to jam, and there were also abnormal seals, the original manufacturer
had to surrender. Camden tried to find a new manufacturer of hydraulic
cartridge counterbalance valve. After a week, it was fruitless. The boss blamed
Camden for poor procurement.

Camden noticed AAK at Google and found that AAK Hydraulic Valve is SUN's
supplier of hydraulic components for 5 consecutive years. He left a message:
SUN is unwilling to sample a hydraulic cartridge counterbalance valve, and AAK
is able to do a good job? The hydraulic cartridge counterbalance valve shall be
durable for not less than 1 year, and its stability shall be guaranteed. I have
judged that he is in trouble when purchasing hydraulic cartridge counterbalance
valves.

According to the hydraulic schematic diagram of the system, hydraulic cartridge
counterbalance valve drawings, equipment working condition parameters and
working scenarios provided by Camden, AAK engineer found that this hydraulic
cartridge counterbalance valve is similar to the hydraulic cartridge relief
valves that we supplied to a Russian customer 1 year ago, which had a service
life of at least 1 year under extremely cold conditions of - 55 ℃. Camden was
very happy to learn about the similar customer case of AAK, and requested to
customize the hydraulic cartridge counterbalance valve and benchmark SUN. I
said that AAK does not pursue whether this hydraulic cartridge counterbalance
valve is advanced, but it must benchmark SUN in stability and reliability. At
the same time, AAK needs to redesign this hydraulic cartridge counterbalance
valve from 3 aspects.

After 45 days, AAK hydraulic cartridge counterbalance valve samples were sent.
3 months later, Camden emailed us that yesterday, the customer reported that
the stability of the hydraulic power unit with new hydraulic cartridge
counterbalance valve was much better than that of the last time. If there was
no abnormality within 1 year, the purchase of equipment would be increased. I
told him that the AAK hydraulic cartridge counterbalance valve, which has no
worries for 1 year, has 3 main highlights:

1. The installation torque of hydraulic cartridge counterbalance valve designed
by peer is too large, which will affect the valve spool and control piston,
causing valve jamming. The hydraulic cartridge counterbalance valve designed by
AAK, the inserts form a snap floating connection with the valve body, and a
seal connection with the valve cage to avoid jamming.

2. AAK sets a throttling slot between the pilot valve spool and the main valve
spool, to achieve stable control pressure at the pilot port, with mild changes
in the opening phase. During the control load drop, the main valve spool
opening is not affected by the load pressure.

3. AAK makes the outer diameter of the pilot mechanism of the hydraulic
cartridge counterbalance valve into a ladder shape, avoiding possible leakage
caused by cutting of the seal ring, and increasing the service life by at least
20%.

AAK hydraulic cartridge counterbalance valve, 3 highlights, no worry in at
least 1 year of use, you can also have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-counterbalance-
valves-aa , k400

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