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AAK Hydraulic Screw-in Cartridge Valve Spool Accuracy Testing Tips
Zimraan, from Türkiye, had trouble purchasing hydraulic screw-in cartridge
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valves from Ningbo China for the first time. In April of this year, they needed
to purchase a hydraulic screw-in cartridge valve equivalent to HydraForce FC12-
20. With the suggestion of colleagues, he chose a hydraulic screw-in cartridge
valve manufacturer in Ningbo and placed the order for 100 pcs directly. They
made a spot check in Türkiye and increased the working pressure by 5-10%. They
found that a small number of hydraulic screw-in cartridge valves were leaking.
The engineer believes that the accuracy of the valve spool component is not up
to standard or caused by small scratches, but the original hydraulic screw-in
cartridge valve manufacturer believes that it is caused by excessive pressure.
Zimraan was helpless and could only inspect the hydraulic screw-in cartridge
valves from the original manufacturer one by one. For those with leakage, he
had to re-purchase.
Zimraan saw on Google that AAK has been a hydraulic cartridge valve supplier
for HydraForce for 9 consecutive years, leaving a message:
1.Does AAK have a hydraulic screw-in cartridge valve equivalent to HydraForce
2.If pressurized by 5-10%, will the hydraulic screw-in cartridge valve leak?
3.What is the delivery time for 36 pcs of hydraulic screw-in cartridge valves?
Based on his message, I determined that there was a problem with the internal
accuracy of the hydraulic screw-in cartridge valve. After communication, I
learned that he encountered a problem when purchasing hydraulic screw-in
cartridge valves from Ningbo for the first time. AAK's judgment is consistent
with his engineer. Due to time constraints, he requested AAK to ship 36 pcs of
hydraulic screw-in cartridge valves directly.
3 weeks later, Zimraan informed us that they still pressurized by 5-10% and
tested AAK hydraulic screw-in cartridge valves, and there were no leaks in all
36 pcs. I told him that only internal accuracy is guaranteed, and each
hydraulic screw-in cartridge valve can pass pressure testing.
How to ensure internal accuracy? Precision machining is the core, and most
hydraulic cartridge valve manufacturers may not fall behind in this stage.
However, not every manufacturer is performing precision testing on each valve
spool component, or performing it properly. Before assembling, AAK hydraulic
screw-in cartridge valve spool components must undergo a precision manual
pressure measuring instrument. No matter the sealing performance, surface
roughness, small scratches, etc. of the valve spool components, any problem can
be discovered. First, install the valve spool assembly into the valve cage,
then place it into the test valve block, turn on the pressure measuring
instrument, and set the 15 second pointer dynamic diagram. Start squeezing the
airbag. When the instrument pressure gauge reaches the specified pressure,
focus on whether there is any change in the pointer of the pressure gauge. If
there is no change in the pressure gauge pointer within 15 seconds, it
indicates that the accuracy of the valve spool assembly meets the standard.
Here is another tip, the setting of the 15 second pointer dynamic graph. Most
manufacturers' testers rely solely on the instrument manual for testing
AAK hydraulic screw-in cartridge valve, with meticulous testing and guaranteed
accuracy, Welcome to give it a try!
AAK HYDRAULIC CARTRIDGE VALVES (670) 2023-09-12
https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve-
manufacturer , s-aak670
SOURCE: Import-Export Bulletin Board (https://www.imexbb.com/)
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