AAK Hydraulic Cartridge Relief Valve with Pressure Relief Buffer

Nantan, from Greece, is an old friend of mine. He has cooperated with AAK
Hydraulic Valve for 5 years. Last month, I received a sample of hydraulic
cartridge relief valve from him. He needed me to optimize it. In the first half
of this year, their customer's die casting machine prototype needed to
customize the hydraulic cartridge relief valve. Due to tight time frame, Nantan
made samples from a local hydraulic cartridge valve manufacturer who had
cooperated with them. The equipment commissioning was not smooth, and there was
vibration and noise when the hydraulic cartridge relief valve was opened under
the condition of large flow and pressure relief. The manufacturer advised that
the problem was caused by the internal structure of the hydraulic cartridge
relief valve, but he was unable to optimize it. Their engineers complained that
the hydraulic cartridge relief valve purchased by Nantan was abnormal, which
embarrassed Nantan.

Nantan contacted other local hydraulic cartridge valve manufacturers, but they
disagreed. Nantan realized that he could only ask for help overseas, so he sent
me 3 original samples. According to their hydraulic system schematic diagram,
on-site debugging video, AAK engineers suggested that not only the structure of
the hydraulic cartridge relief valve should be optimized, but also its
functions should be improved. After obtaining additional time, Nantan asked AAK
to make samples for the hydraulic cartridge relief valve as soon as possible.
After 35 days, AAK sent 10 hydraulic cartridge relief valve samples.

A month later, Nantan informed AAK that the prototype had been successfully
debugged and delivered to the customer. AAK optimized the structure of this
hydraulic cartridge relief valve from 3 aspects, and perfected the hydraulic
cartridge relief valve with pressure relief buffer function:

1. The side of the hydraulic cartridge relief valve cage is provided with a
valve oil inlet and a valve oil outlet. The valve spool is installed in the
axial hole of the valve cage, the control cover plate is at the upper end of
the valve cover, and the poppet valve spool and regulating rod are set in the
axial hole of the screw sleeve.

2. The upper end of the control cover plate is connected with the buffer valve
body. The buffer valve spool is set in the axial hole of the buffer valve body.
The control port is connected with the damping hole. The control port is
connected with the control chamber through the hole in the middle of the buffer
valve spool.

3. The axial hole of the electromagnetic valve body is provided with an
electromagnetic valve spool, the working port is connected with the control
port through the annular groove in the middle of the buffer valve body, and the
oil drain port is connected with the oil return port through the buffer valve
body and the control cover plate.

The hydraulic cartridge relief valve with optimized structure has high control
degree and reliability, small flow resistance, small impact, large flow
capacity and fast action when the valve spool is opened in buffer mode, which
can effectively reduce system vibration and noise, operate stably and have a
long service life.

AAK hydraulic cartridge relief valve, small impact, no vibration, you can also
have a small try!

https://www.aakindustry.com/info-detai , l/relief-valves-aak448

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