Vacuum Tube Lifting SystemsOperator Controls Standard Operator ControlsFeatures on All Vacuum Tube Lifters Standard Control Heads Features The system controls work by squeezing the spring loaded smaller diameter bar inside the handle slightly. The up and down movement controls the contraction of the main tube. Most people use a combination of there fingers and thumb. … Continue reading Pneumatic Release and Lift Assist Valve for VT Vacuum Tube Lifting Systems Model# VT-RLV-M/S