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Differential Pressure Flowmeter with Orifice

Kirchner und Tochter Differential Pressure Flowmeter with Orifice flow instrumentDP Orifice Plate Flowmeters from Kirchner Germany are manufactured with a wide variety of nominal widths for water, air, transparent and non-transparent liquids and gases and non-conductive fluids (mineral oils, demineralised water). 

  • Simple operation, no moving parts, wear-free
  • Horizontal and vertical installation - between flanges - int. or ext. threads - pipe union
  • Pipe size from DN 40 to DN 200
  • Flow range: air 0.5 - 4000 m3/h, water 0.05 - 735 m3/h
  • Diff.Pressure: air: 5 - 1000 mbar, water: 100 - 1000 mbar
  • Accuracy 2,5% of full-scale range
  • Calibration acc. to customer specification

Models:

DDM Orifice Plate DDM DS-11 - DP Gauge DDM EM - digital LED display in m3/h DDM DS-31 - Microswitch
DDM  DDM DS11dp  DDM EM   DDW DS31
 can be connected to DP Transm.  opt. with 2 microswitches  4 – 20 mA / 0 – 10 V output  high overload withstand capability

The sprinkler orifice plate SMB series is installed in stationary sprinkler systems and has been approved by the VdS damage prevention.

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Working Principle

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A differential pressure arises at a pipe constriction, which is proportional to the square of the flow rate through the pipe.

The resulting differential pressure can be recorded with a meter and can be directly indicated as flow rate on a scale.

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