AAK Hydraulic Cartridge Relief Valve Surface Roughness Ra0.1

Eustace is from Greece and is still in the probationary period. He almost
switched jobs due to a hydraulic cartridge relief valve that has high
requirement on roughness. At the beginning of this year, their customer
customized a hydraulic manifold, and all hydraulic cartridge valves needed to
be purchased by Eustace, except for hydraulic cartridge relief valves.
Everything else went smoothly. The original manufacturer sent samples 3 times,
but the roughness of the surface of the hydraulic cartridge relief valve spool
and cage still cannot meet the requirements of Ra0.1. Eustace was complained
about several times by their chief engineer due to delays in procurement time.

Eustace left a message on AAK website: Can the roughness of the surface of the
hydraulic cartridge relief valve spool and cage be controlled within Ra0.1?
After communication, we learned that the original hydraulic cartridge relief
valve manufacturer failed for 3 times, which made him very helpless. I told him
that the design of their hydraulic manifold requires high precision for the
hydraulic cartridge relief valve. If the roughness is not solved properly, the
valve spool is prone to jamming. AAK cannot guarantee that the roughness of
each processed product is within Ra0.1, but the hydraulic cartridge relief
valves to be in the customer's hands must meet the standard. After 35 days, AAK
sent out 10 samples.

1 month later, Eustace informed us via email that their hydraulic manifold had
been approved by the customer. Before the hydraulic manifold assembly, their
technicians tested each hydraulic cartridge relief valve sent by AAK, and its
roughness was within Ra0.1.

The roughness of the AAK hydraulic cartridge relief valve spool and cage can be
controlled within Ra0.1, with precision machining as the core and detection as
the key. AAK uses Japan Mitutoyo roughness measuring instrument to check, and a
dedicated person is responsible for it. The advantages of this measuring
instrument are large measurement range and high accuracy. We do this by first
placing the valve spool or cage on a testing glass platform, and the device
will directly capture high-definition images. At the same time, when the
contact needle scratches the tested surface of the valve spool and cage,
although the surface contour fluctuates between peaks and valleys, the contact
needle can vibrate up and down along the peaks and valleys, and at the same
frequency, the signal is amplified by more than 10 times through an electronic
device, and then transmitted to the computer to form data or dynamic images.
With this big killer, the roughness Ra0.1 is not difficult. Most hydraulic
cartridge valve manufacturers in China do not necessarily have this equipment
for detecting roughness, or it may not be 100% full inspection.

AAK hydraulic cartridge relief valve, high precision, no jamming, you can give
it a try!

AAK HYDRAULIC CARTRIDGE VALVES (661) 2023-08-31

https://www.aakindustry.com/info , -detail/cartridge-relief-valves-aak661

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