VCH29 Series Vacuum Cup Holder

Along with all the other features they share with the other special cup holders, these also have a built-in shut-off valve. The purpose of the shut-off valve is to automatically close suction when the cup is not in contact with the surface of the load to be handled or in case of a faulty grip or of considerable transpiration.
The acutal springing stroke is:
For height C = 55mm 37 mm
For height C = 110 mm 84 mm