AAK Hydraulic Cartridge Pressure Relieving Valve 2 Advantages

Antonio, from Mexico, began purchasing hydraulic cartridge valves from China 3
years ago. Last September, Antonio customized a hydraulic pilot operated
pressure relieving valve in Ningbo for use in their newly developed hydraulic
power unit. During equipment commissioning, it was found that the internal
leakage of the hydraulic pilot operated pressure relieving valve was not up to
standard and the opening and closing performance was not satisfactory. The
original hydraulic pressure relieving valve manufacturer has revised the
samples 3 times, but none of them can satisfy their engineers. Antonio was very
upset.

Antonio saw the customer case of the hydraulic pressure relieving valve
released by AAK in B2B, and left a message.

1.What is the minimum internal leakage of AAK hydraulic pilot operated pressure
relieving valve?
2.What is the sealing effect of AAK hydraulic pilot operated pressure relieving
valve?
3.What is the opening and closing performance of AAK hydraulic pilot operated
pressure relieving valve?

I suspected that he was unsuccessful in testing hydraulic pressure relieving
valve from other hydraulic cartridge valve manufacturer. After communication,
it was learned that the original manufacturer had failed 3 times, which touched
me. Perhaps the direction of optimization was wrong. According to the equipment
abnormality video sent by him, combined with the hydraulic system and the
original sample, AAK engineers found the problem and were 90% confident that
the sample would be successful. After 45 days, AAK sent 8 samples of hydraulic
pilot operated pressure relieving valves.

Last week, Antonio said that after installing AAK hydraulic pilot operated
pressure relieving valve into their hydraulic unit, the operational lag was
resolved. AAK hydraulic pilot operated pressure relieving valve has two major
advantages: small internal leakage, good opening and closing characteristics,
and the original hydraulic cartridge valve manufacturer can only be amazed.

1. The valve sleeve of the hydraulic pressure relieving valve has an outwardly
inverted triangular clamp head at one end, and the adjusting sleeve catches the
clamp head. The valve sleeve and the adjusting sleeve are fixedly connected
together. There is a steel ball between the valve seat and the pilot valve
spool, and there is a circular hole on the valve seat that communicates with
the radial hole and can accommodate the steel ball. There is a blind hole on
the pilot valve spool to accommodate the steel ball.

2. The valve sleeve has an axial two-stage step through hole that communicates
with the oil outlet chamber as an overflow and outflow port. The junction
between the large hole and the small hole is a conical surface, the valve spool
and the valve sleeve are sealed at the conical surface, and the oil outlet
chamber is located near the conical surface at the bottom of the large hole of
the valve sleeve. The control oil chamber is located at the rear of the valve
sleeve large hole, and the valve sleeve has a three-level outer circle outside.
The right end face of the valve sleeve is an inner cone, which forms an annular
plane between the inner cone and the outer cone, making the contact area
between the valve sleeve and the valve seat small and stable, structurally
reducing internal leakage rather than simply "blocking" internal leakage as the
original hydraulic cartridge valve manufacturer did.

3. There are two stages of holes inside the valve spool, with small holes for
damping and large holes for placing springs. There are two narrow grooves in
the middle of the valve spool and a wide groove at the right end, which can
reduce the contact between the valve spool and the valve sleeve and cause
sliding friction, greatly improving the opening and closing characteristics of
the valve.

AAK hydraulic pilot operated relieving valve has two advantages: small internal
leakage and good opening and closing characteristics. You can also try it out.

AAK HYDRAULIC CARTRIDGE VALVES (547) 2023-03-31

https://www.aakindustry.com/info , -detail/pressure-relieving-valves-aak547

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