Product manual

Model #RB3-065/035 14 R20140519
If the ultimate vacuum level does not reach at least 22 inHg, either the
upstream air supply is restricted or there is a problem with the device.
The included vacuum gauge is only capable of ±3 inHg accuracy,
which is sufficient for simple install verification.
6. Adjusting the flow-control valve on the release port will require
some tuning. A tradeoff exists between inflation (object
release/ejection) speed and overinflation protection. With the valve
fully open, you can override your overinflate protection to achieve the
fastest ejection speeds. This is a perfectly fine way to use your gripper,
but comes with obvious additional risk.