AAK Hydraulic Cartridge Flow Control Valve with Closed Loop Control

Zenon is from a hydraulic equipment company in Mexico. He has purchased
hydraulic components from the United States for 4 years smoothly. His boss
learned that more and more colleagues are purchasing from China, and also asked
Zenon to try to contact China hydraulic valve manufacturers. Unexpectedly, he
was stumped when he purchased hydraulic cartridge flow control valves the first
time. At the beginning of the year, their company customized a hydraulic
lifting equipment for a customer, which required to use hydraulic cartridge
flow control valves. Zenon found a hydraulic cartridge valve manufacturer in
Ningbo to make samples for the hydraulic cartridge flow control valves. During
equipment debugging, the lifting positioning was abnormal. Their engineer
judged that the hydraulic cartridge flow control valve was abnormal. After the
manufacturer tested the hydraulic cartridge flow control valve, its parameters
met the requirements of the drawing. Their engineer asked the manufacturer to
further optimize the hydraulic cartridge flow control valve, but the
manufacturer was unable to do it. Zenon had to change the manufacturer. After 1
week, no manufacturer was willing to make samples, because there was no
direction and great uncertainty. The boss has been pushing, and Zenon was under
pressure.

Zenon found AAK on Google, stayed on AAK website for more than 7 minutes,
noticed that AAK mainly supplies some big brands of hydraulic cartridge valves
in the United States. Perhaps he saw the hope from AAK and left a message:
1.Is the hydraulic cartridge flow control valve the root cause of abnormal
hydraulic lifting and positioning?
2.Can AAK optimize the hydraulic cartridge flow control valve?
3.How long does it take for AAK to customize the hydraulic cartridge flow
control valve?

AAK website has messages every day. For such specific and targeted messages, I
always give priority to them. After communication, I learned the dilemma of the
hydraulic cartridge flow control valves he purchased from the original
manufacturer. According to the original design drawings and the video of
equipment on-site commissioning, AAK engineers believed that the probability of
the problem lies in the control mode of the hydraulic cartridge flow control
valve, and we have specific plans to optimize it. Zenon relaxed and asked AAK
to make samples. After 30 days, AAK sent 12 samples of hydraulic cartridge flow
control valves.

3 weeks later, Zenon said that the equipment debugging was smooth, and the
lifting and positioning were normal. The customer was very satisfied with the
customized prototype, and would send regular order if there was no abnormality
after a trial period. I told Zenon that AAK has confidence on the hydraulic
cartridge flow control valves, and can wait patiently for the customer's
regular order. We have facts had proved it.

For this hydraulic cartridge flow control valve, the valve port flow is not
only related to the valve opening area, but also related to the pressure
difference before and after the valve port. We use closed loop to control the
flow of the valve. First, connect the spring chamber with the non spring
chamber through the flow channel, and set the return spring and the valve spool
on the same axis, with one end connected to the valve body and the other end
connected to the valve spool for valve spool reset. In this way, the flow will
not change with the change of load pressure, and the flow of the control system
will change with the set value. The advantages of such optimization: accurate
control, small pressure loss and flexible operation. Most hydraulic cartridge
flow control valves adopt open loop control, which has low control accuracy,
complex mechanical structure and large pressure loss.

AAK hydraulic cartridge flow control valve has precise control, small pressure
loss and flexible operation. You can also have a small try!

https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-flow-control-
valves-aak4 , 04

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