AAK solved the leakage in hydraulic check valves in 2 months

Cuenca is a senior purchaser of AGRIA company in Spain. The boss is very
satisfied with his purchasing work. Two years ago, AGRIA company developed a
hydraulic equipment, and there were complaints after sales for more than half a
year. The main problem was that the starting force of the hydraulic system
would be insufficient, which was caused by the increase of internal leakage of
the hydraulic check valves in the equipment. After Cuenca contacted the
original hydraulic check valve manufacturer, the manufacturer said that some
hydraulic check valves may have deviation during assembly, and he was willing
to replace the hydraulic check valves with large leakage with new ones. Cuenca
thought it was completely solved after replacement, but what surprised him was
that less than a year after the new hydraulic check valve was replaced, the
same problem occurred again. The boss was very disappointed with his purchase
of hydraulic check valves this time.

The manufacturer of the original hydraulic check valves still said that except
for replacing the hydraulic check valves, there is no other way. Cuenca began
to worry that if the same problem happened a third time, it would be too
shameless. To be safe, he began to look for a new supplier of hydraulic check
valves and began to test samples. At the same time, he also wanted to know why
the hydraulic check valves produced by the original manufacturer leaked. In
this way, Cuenca contacted AAK hydraulic valve.

After several rounds of communication with Cuenca, we learned the story between
him and the original manufacturer of hydraulic check valves, and suggested him
to send us the hydraulic check valves with problem and provide us the drawings
of hydraulic check valves at the same time. AAK engineer disassembled the
hydraulic check valves of the original manufacturer and found that there were
wear marks on the sealing line on the surface of the poppet valve. When the
pressure oil reversely enters the hydraulic check valve, the cone cannot
strictly seal the oil and cause leakage, and some oil flows out of the oil
inlet. After receiving AAK's analysis, Cuenca asked us to make 4 samples of
hydraulic check valves according to his drawings.

Our engineers designed a new hydraulic check valve according to the service
frequency and working conditions of the equipment, replacing the cone valve
with the ball valve. The cone valve is prone to fatigue creep deformation and
wear after working for a long time, resulting in a gap between the valve sleeve
and the cone, resulting in leakage. The outer circle of the ball valve can
contact the inner taper ring line, and the connecting hole can be closed to
reduce the leakage caused by wear. Cuenca was surprised that AAK dared to take
the initiative to modify the drawings of their hydraulic check valves, and
expected to see the sample performance of AAK hydraulic check valves.

Two months later, AAK sent samples of the newly designed hydraulic check
valves. A year later, Cuenca said that the hydraulic equipment equipped with
AAK hydraulic check valves had no complaints about startup. He was glad that
the original hydraulic check valve manufacturer replaced it again and again,
which could only guarantee the service for half a year, but AAK solved the
problem one time. In only 2 months, AAK helped solve the problem of leakage in
the hydraulic check valves that plagued Cuenca for nearly 2 years. Cuenca would
rather give up the original supplier who has cooperated for many years than
choose AAK hydraulic check valves.

AAK hydraulic check valve, valve spool design is unique and different, welcome
to have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-check-valves-aak165

Click to Enlarge