What will be the clamping force when the pressure falls to zero?

Question:

My customer wants to use this pneumatic clamp, AMWS but once clamped, the air pressure will be back to zero.

What will be the clamping force, when the pressure is zero?

I read this in the catalog

With a lowered air pressure, the clamping force may be lowered by excessive vibration.

would that mean, if there is no vibration the clamping force remains the same

Answer:

When the air pressure becomes zero, the clamping force decreases gradually.

In the end, the clamping force made by the internal spring remains.

For the small type, the spring clamping force is 20N and it is 40N for the large type.

Please note this item AMWS will be discontinued December 31 2019.

The similar product AMWD pneumatic hold down clamp will stay in our lineup
so you should use AMWD type