This Architectural Drawing is of (PIBCV) Without Pressure. Pressure Independent Control Valves or Pressure Independent Balancing and Control Valves – also commonly known as PICVs (or PIBCVs) – are getting more and more popular in both 2- and 4-pipe heating and cooling applications due to their accurate flow control at any load condition. The diaphragm reacts to the system and regulates the pressure differential across the actuated control valve orifice to maintain its flow rate. On a PICV (see graphic below), when pre-setting the maximum flow rate, the inlet orifice changes in size, which does not interfere with the length of the stroke. For more details and information download the drawing file.
