Orifice Plates with Taps

Orifice Plate with Taps compact


Orifice plates with taps are flow elements used for flow measurement of aggressive and non-aggressive gases, steam and liquids. In contrary to the normal orifice plates, they include a carrier ring where the pressure taps are located. This integral design allows these orifice plates to be mounted between standard pipe flanges.


Orifice plates with taps have two distinctive designs:

Orifice Plates with Single Bore Taps BLB 300

BLB 300 Symbol

The carrier ring and the orifice plate are manufactured in one piece. This design is easy to clean and thus suitable for media that accumulate, become resinous or for plants which are not operating constantly.

Orifice Plates with Ring Chamber BLA 200

BLA 200 Symbol

The carrier ring is divided into two pieces which form two ring chambers. The orifice plate is positioned in between them. The ring chambers average out any flow disturbances and thus allow for more stable pressure signals.

Pressure Taps

Typical pressure tap designs are as follows:

  • Plain ends for fittings
  • Butt weld ends
  • Threaded ends
  • Flanged ends
  • Compact taps according to IEC 61518

Measuring Uncertainty

The measuring uncertainty depends on the process conditions and amounts to approx. 0,5% – 1,2% of the discharge coefficient.

Weld-In Design

Weld-In Orifice Plate EBLB 800 / EBLA 800

EBLB 800 Symbol

We offer weld-in orifice plates both with (EBLA 800) or without (EBLB 800) ring chamber. Welding avoids sealing problems which may arise especially with high pressures and temperatures.

We gladly add welded inlet and outlet pipe in order to meet the requirements of the relevant calculation standard.


We can offer instrument valves and/or manifolds for your orifice plates with taps. For steam flow measurement we recommend our condensate pots. See here for more information.


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