Using the Reducer Device in PIPE-FLO Advantage and Professional 17

Using the Reducer Device in PIPE-FLO┬« Advantage and Professional 17


The new Reducer device is used to model a reduction or increase in flow area between two pipes of different diameters. The Reducer may be used in lieu of a Pipe Contraction or Pipe Expansion in the Installed Valves & Fittings of either a Compressible Pipe or (incompressible) Pipe when a more definitive placement of the device is desired. The Reducer may also benefit the user by being a visible indicator of pipe size transitions.

Design Data for a Reducer

  • Name (required): unique identifier, default set by Auto-Naming
  • Design Status: automatically changed from Undesigned to Sizing to Designed when the necessary design data is entered
  • Elevation (required): where the blower is in relation to the reference zero elevation datum of the system
  • Transition Length (required): the axial length required to change flow area from the inlet to the outlet, a value of 0 indicates an abrupt pipe side change

Calculated Results for a Reducer

  • Flow Rate
  • Total Pressure Drop
  • Static Pressure Drop
  • Head Loss (liquid applications only)
  • Inlet Total Pressure
  • Inlet Static Pressure
  • Outlet Total Pressure
  • Outlet Static Pressure
  • Inlet Velocitiy
  • Outlet Velocity
  • Diameter Ratio
  • Area Ratio
  • Transition Angle
  • Flow Coefficient
  • % Deviation

Reducer Calculations

For incompressible calculations, the Reducer's pressure drop (or pressure gain if a negative dP is calculated) is calculated from its equivalent flow coefficient (Cv or Kv) is calculated from it's resistance coefficient (K1 or K2) according to equations found in the Crane TP-410. For compressible calculations in PIPE-FLO Advantage, friction is ignored and the area change relationships are applied. See the program Help File for equations used for the Reducer.

Reducer Applications

Pipe reductions and expansions