AAK Hydraulic Flow Control Valve with PU Polyurethane Rubber Seal

Bernardo comes from a hydraulic winch manufacturer in Brazil, and has
cooperated with AAK several times on non-standard customized hydraulic
cartridge valves. At the beginning of last year, Bernard company needed to
purchase hydraulic flow control valves for a batch of hydraulic winches. Due to
cost pressure, the boss asked Bernard to reduce the procurement cost of
hydraulic flow control valves by 10%. This hydraulic flow control valve needs
to be the same as HydraForce standard part. After a round of sourcing, Bernard
determined the manufacturer of the hydraulic flow control valve. 7 months after
the sale of the hydraulic winch, a customer complained that the sealing ring of
the hydraulic flow control valve was broken, resulting in leakage, which caused
the hydraulic winch to rise powerlessly. 6 months after the original
manufacturer replaced the sealing ring with new one, the old problem happened
again. The customer complained directly to the boss, who asked Bernard to
replace all the hydraulic flow control valves within 1 month and asked the
original manufacturer to bear the costs. However, the original manufacturer
could not reach an agreement. Bernard was caught in the middle. He was
embarrassed for 2 weeks and made no progress. The boss was very disappointed
with him.

Bernard sent me an email asking about the time and cost of re producing the
hydraulic flow control valves. He wanted to pay for it himself. According to
the hydraulic flow control valve drawings he sent, I realized that maybe only
replacing with durable O-ring could solve his embarrassment. I sent him 10 O-
rings for matching tests. A week later, Bernard told me that AAK O-rings could
be matched with the original manufacturer's hydraulic flow control valves. He
asked me to send 500 O-rings to Brazil as soon as possible, and he could
finally have a good sleep.

Last week, Bernard sent an e-mail to express his thanks. All these hydraulic
flow control valves have been assembled with AAK O-rings. It has been more than
a year, and there has been no complaint of leakage caused by the rupture of the
sealing ring of the hydraulic flow control valves. The boss also praised him
for solving big losses with small money.

AAK's O-ring has 3 strengths: no sloughing, no extrusion and wear resistance.
The material and structure of the seal ring directly affect the performance of
the seal ring. The hardness, extrusion resistance, tensile strength and
deformation of the material all determine the service life of the seal ring,
and the structure of the seal ring also determines the sealing effect. AAK
selects Japan's special PU polyurethane rubber sealing ring, and the lip
compression of the sealing ring is strictly controlled between 15% ~ 20%. The
wear resistance and high pressure resistance of this seal ring are more than 3
times that of other nitrile rubber seals. Most hydraulic flow control valve
manufacturers choose nitrile rubber sealing ring, which is easy to be dislodged
or extruded to cause wear. For high-frequency working conditions, the
durability is 9 months at most.

AAK hydraulic flow control valve, the O-ring used has 3 strengths and no
leakage, you can also have a small try.

https://www.aakindustry.com/info-detai , l/hydraulic-flow-control-valves-aak344

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