AAK hydraulic check valve, 0 leakage, Caterpillar admired

In March this year, the sales manager of Caterpillar received a phone call from
a Spanish customer complaining that several excavators produced by their
company had small start-up faults. The repairman judged that the hydraulic
system leaked oil, which should be caused by the leakage of the hydraulic check
valve. The customer asked them to replace the hydraulic check valve as soon as
possible. This customer accounts for 40% of Caterpillar's sales. Although it
has passed the maintenance period, they must help the customer solve the
problem.

The original hydraulic valve supplier said that for the hydraulic check valve
under this working condition, there can only be no leakage for 2-12 months. In
extreme cases, it may be less than 2 months. The customer was disappointed with
such a maintenance plan. The boss asked Mark, the purchasing manager, to find a
solution satisfying the customer. Mark contacted more than 10 hydraulic valve
manufacturers, but did not get a satisfactory reply. He boss urged him to make
a new plan twice a day.

Mark thought of AAK HYDRAULIC VALVE he had contacted before. Maybe AAK can do
some help. He firstly asked us why so many hydraulic valve manufacturers can't
achieve 0 leakage for more than 12 months for this style of hydraulic check
valve? The hydraulic check valves often use steel ball or metal cone slide
valve to contact and compress with the orifice of metal valve seat under the
action of spring and fluid pressure to prevent the reverse flow of liquid, but
it is difficult to achieve absolute seamless butt joint in the cutting of metal
contact surface. Especially under the special working condition of this
customer, it is more difficult to avoid leakage. This hydraulic valve
manufacturer who has insured for 2 months is already great.

Mark thought that AAK HYDRAULIC VALVE could not produce a hydraulic check valve
with 0 leakage for more than 1 year, and asked how long we could insure at
most. AAK can produce hydraulic check valve with 0 leakage for more than 12
months. If there is no leakage within 1 month, and if subsequent maintenance is
in place, the hydraulic check valve can be 0 leakage for 24 months.

Mark was surprised at our reply and thought we were joking. Let's talk about it
with facts: AAK will send the hydraulic check valve samples within 20 days, you
test the hydraulic check valve first, and we will then discuss it after the
test.

After 15 days, AAK sent the hydraulic check valve samples to Caterpillar. Their
engineers conducted internal test first, and there were no abnormalities in
many tests. Their after-sales personnel took the samples directly to the
customer's construction site for on-site installation and commissioning. It
worked continuously for 12 hours, and everything was still normal. The customer
was very satisfied with Caterpillar's after-sales service. The boss was also
very happy and asked Mark to hurry up to purchase. ark was curious how AAK
achieved the hydraulic check valve with 0 leakage for more than 12 months?

After receiving the drawings, AAK fine tuned the structure of the hydraulic
check valve in the original design without adopting the traditional sealing
design. A special soft sealing ring is installed between the outside of the
boss of the valve seat and the end face of the valve spool. At the same time,
the inner diameter of the soft seal ring is less than the diameter of the boss,
rather than the traditional diameter more than that of the boss. When the
hydraulic check valve is closed, the soft sealing ring will deform under the
action of hydraulic pressure and compress the contact sealing surface between
the metal valve spool and the metal valve seat to achieve 100% sealing and
ensure 0 leakage.

Last week, Mark sent us an inquiry for a new hydraulic valve. Incidentally, he
said that since the Spanish customer installed their excavator with AAK
hydraulic check valve, everything is normal. The customer has been purchasing
other styles of excavators from his company. The boss is more and more
appreciative of him now, and assigned all important purchases to him.

AAK hydraulic check valve, zero leakage, pay attention to, welcome to have a
small try if you need a new and top hydraulic valve manufacturer in Ningbo.

https://www.aakindustry.com/info-detail/hy , draulic-check-valve-aak115

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