MR-HM 150.29 Energy losses in piping elements Teaching Equipment Hydraulic Bench Description • pressure losses in various pipefittings and in the ball valve • precise pressure measurementvia annular chambers • visualisation of differential pressures on manometer panel When water flows through a pipe system, the flow resistances causes pressure losses to occur at pipe fittings andvalves and fittings. The HM 150.29 unit can be used to investigate and visualise the pressure losses in pipe elements. The experimental unit can be used to assess how different pipe geometries affect the flow. The HM 150.29 experimental unit comprises a pipe section containing severalpipe elements with different flow resistances, as well as a contraction and enlargement piece. There is also a ballvalve integrated in the pipe. There arepressure measuring points with annularchambers upstream and downstream ofthe pipe elements, which ensure accurate pressure measurement. The pressure measuring points can beconnected in pairs to a 6 tube manometers in order to determine the pressure loss of a pipe element. The experimental unit is positioned easily and securely on the work surface ofthe HM 150 base module. The water issupplied and the flow rate measured byHM 150. Alternatively, the experimentalunit can be operated by the laboratorysupply. Learning objectives/experiments • investigate pressure losses at segment bend and bends • investigate pressure loss at contraction and enlargement • pressure loss at a ball valve and determination of a simple valve characteristic Specification [1] investigation of the pressure loss in flow throughpipe fittings and in the ball valve [2] sudden contraction and sudden enlargement, pipebend, segment bend, pipe angle and ball valve as measurement objects [3] annular chambers allow precise measurement ofpressure [4] 6 tube manometers for displaying the pressures [5] Bourdon tube pressure gauge for pressure measurement [6] flow rate determined by base module HM 150 [7] water supply via HM 150 or via laboratory supply Technical data Pipe, PVC • inner diameter: 17mm Pipe elements, PVC Inner diameter: d • sudden contraction: from d=17 to d=9,2mm • sudden enlargement: from d=9,2 to d=17mm • segment bend: d=17mm, 90° • pipe angle: d=17mm, 90° • narrow pipe bend: d=17mm, r=40mm, 90° • wide pipe bend: d=17mm, r=100mm, 90° Measuring ranges • pressure: · 1x 0…1,6bar · 6x 0…0,03bar LxWxH: 840x675x930mm Weight: approx. 28kg Required for operation HM 150 (closed water circuit) or water connection,drain Scope of delivery 1 experimental unit 1 set of hoses 1 set of instructional material
