Overload Protector FAQ

1. What is Overload Protector?

   Overload protector is installed on press in order to check the overload hydraulic pressure of cylinder inside the slide. The hydraulic pressure of cylinder will be released immediately within 3/1000 seconds when overload occurs.

2. What is the function of the Overload Protector?

   When happen overload, in order to protect the die and press, the press will stop working immediately after receiving the signal from limit switch.

3. When using the Overload Protector, what’s the matter need to pay attention to?

   • ① Please check before use if wire and air piping connection is correct.
   • ② When press is normally operated, air supply should not be turned off absolutely.
   • ③ Please check the hydraulic oil in tank is enough.If lower than mid position of the oil level gauge, please add oil immediately.
   • ④ The hydraulic oil should be changed every year.

4. What kind of hydraulic oil can be used?

   Can be used ISO-VG-32 or R-32

5. Many customer ask if they use other brands of overload protector and would like to replace it with SANDSUN’s overload protector, is it applicable?

   You have to provide more information such as the overload model and photos of the original brand for SANDSUN to choose the applicable model specifications.

6. How to select the Overload Protector model?

   Suitable for capacity of press
   Under 200T	06：Small type 08：Standard type 10：Large flow type
   200T~600T	12：Standard type

7. The Capacity of press over 600T, how to select the overload protector？

   It is recommended to choose VA20 model with larger releasing flow rate.

8. I don't know how to choose the overloaded protector model, what should I do?

   You can provide specification and parameter of press, SANDSUN can be select appropriate product specifications for customers.

   

9. What is the difference between VA model and VS model of overload protector?

   VA model overload uses『air pressure』to control the overload pressure setting. (Customers can easily adjust by themselves.)
   VS model overload uses『Spring adjustment』to control the overload pressure setting. (Customers can’t easily adjust by themselves, SANDSUN will complete the pressure setting before shipment.)

10. What should I do if I use the VS model overload protector, but forget the previous pressure setting ?

    Every product of SANDSUN will have a sticker with a serial number for tracking that can be check the pressure setting of the previous purchase.

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