Overload protector
 In order to check the hydraulic pressure of cylinder inside the slider, overload protector device is equipped in the press.
If it happens the situation of overload, the hydraulic pressure of cylinder will be released within 3/1000 seconds immediately.
When it happens overload, in order to protect the press and die, the press will stop working immediately after receiving the signal from limit switch.
After it happen overload, in order to let press operate normally, the air driven hydraulic pump will supply oil of cylinder quickly to reach normal working pressure.
Overload protector have pressure control valve, which can adjust hydraulic pressure automatically. In the process of pressing, it can eliminate the impact of excessive rising of hydraulic pressure arising from rising of the oil temperature.
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Model Selection
Control type |
A : Air pressure control
S : Spring adjust |
Suitable for capacity of press |
06 : 200 tons & down
08 : 200 tons & down
10 : 200 tons & down
12 : 200 ~ 600 tons |
Ratio of pump pressure |
Empty (Standard type) : 22 ratio
M : 32 ratio H : 42 ratio |
Design No. |
Empty : First edition
A ~ Z : Revise edition |
Ratio of overload pressure |
5 : x 50 ratio
7 : x 70 ratio
9 : x 90 ratio |
Position of limit switch (type) |
2 : NO type
6 : NC type |
Volume of oil tank (Liter) |
O : None 3 : 4.0
1 : 1.2 5 : 8.0 |
Control unit |
Empty : None
C : Include |
Pressure setting (kgf/cm2) |
VA Model : None
VS Model : ex. 300 is 300 kgf/cm 2 |
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