AAK Hydraulic Counterbalance Valves Benchmarked with SUN Hydraulics

Last week, the German customer Thorsten sent an order for 1,200 hydraulic
counterbalance valves, and said that only AAK and SUN hydraulic counterbalance
valves passed 1 million durability tests among the 6 hydraulic valve
manufacturers making the samples. However, the price of AAK was 30% lower than
that of SUN, and the delivery time was faster.

In May this year, Thorsten’s company received an order for a batch of special
hydraulic winches. The customer requested that the equipment be guaranteed for
at least 1 year of service life. The engineer required that the durability test
of the hydraulic counterbalance valve to be purchased by Thorsten must reach
more than 1 million times. Thorsten found a local hydraulic counterbalance
valve manufacturer to carry out the test. After 100,000 times, the O-ring wear
affected the seal. After the sealing ring was replaced, the valve spool and
valve body were worn and leaked again after 200,000 times, and the local
manufacturer surrendered.

Thorsten had to find a manufacturer of hydraulic counterbalance valves with
higher durability. In order to avoid wasting purchasing time again, the two
schemes were carried out simultaneously. One is to purchase the original SUN
hydraulic counterbalance valves, and the other is to find a factory for
customized hydraulic cartridge valves. When Thorsten contacted AAK, I told him
that the requirement of hydraulic counterbalance valves for 1 million times was
not very high. How could local hydraulic valve manufacturer fail? Thorsten said
that when testing this hydraulic counterbalance valve, the opening and closing
cycle time is set to 5 seconds, the set pressure is 21 PMa, and the flow rate
is 9L/min. The wear resistance of the sealing ring, valve spool and valve body
is at least 50% higher than that of the conventional hydraulic counterbalance
valves. This time, including AAK, there are 6 hydraulic valve manufacturers to
make samples.

More than a month later, Thorsten said that among the 6 hydraulic
counterbalance valve manufacturers, only AAK and SUN hydraulic counterbalance
valves have passed the durability test for 1 million times, but the price of
AAK is 30% lower than that of SUN. At the same time, AAK can provide a delivery
time 4 weeks faster than that of sun. Thorsten especially wants to know why AAK
is so strong. AAK hydraulic counterbalance valves are different from peers due
to the following 3 points:

1. AAK adopts Japanese special polyurethane rubber sealing ring for this
hydraulic counterbalance valve. Under the special working condition required by
Thorsten, the durability limit of rubber sealing ring is about 100,000 times
only, while the wear-resistant and high-pressure resistance performance of ours
is more than twice that of other rubber sealing rings.

2.The 20CrNi2MoV high carburizing bearing steel imported from Germany adopted
by AAK, combined with the carburizing pretreatment process and through the
secondary quenching + cryogenic treatment + low temperature tempering process,
has a microhardness of 237-247HV, and its wear resistance and contact fatigue
performance have been improved by more than 3 times. Most hydraulic
counterbalance valve manufacturers can not master the key of heat treatment
even if they choose this steel.

3.AAK has its own durability test equipment independently developed, combined
with NFPA/T2.6.1 standard, each hydraulic counterbalance valve is tested and
meets the standard.

AAK hydraulic counterbalance valves, benchmarked with SUN, you can also try a
small order!

https://www.aakindustry.com/info-det , ail/hydraulic-counterbalance-valves-aak322

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