Vacuum calibration tank, VB2-250 1.Pipe O.D. 40-250mm 2.Chamber 1 1400mm ... , Model VB 63/125/160 Vacuum calibration tank, Model VB2-250 Vacuum calibration tank, Model VB2-250Patent water control, unique valve ... of Chamber 27100mmTotal length8900 mm Vacuum calibration tank, Model VB2-450 Vacuum calibration tank, Model VB2-450Patent water control, unique valve ...