PV211 Pneumatic Pressure Calibration Pump The field-proven PV211 is a lightweight yet high quality combined pressure and vacuum hand pump. The PV211 has been designed to provide maximum pneumatic pressures efficiently and effortlessly. www.bakerhughes.com/druck/test-and-calibration-instrumentation/pressure-testing-gauges-pumps-loop-calibrators-1/pv211-pressure-generating-hand-pump-0