Frese SIGMA Compact


The Frese SIGMA Compact is an externally adjustable dynamic balancing valve that provides simple, accurate and reliable flow limitation and isolation in heating and cooling systems.

The Frese SIGMA Compact can be used in both heatingand cooling systems for the effective distribution of flow in various sections of the system.The Frese SIGMA Compact can be used instead of traditional double regulating valves and can be installed in both variable flow systems and constant flow systems.

The Frese SIGMA Compact can be set to the required position easily by using the scale, to limit the flow rate in certain parts of a system, eliminating overflows and the unnecessary wastage of energy. The internal differential pressure control function of the Frese SIGMA Compact ensures that the set flow rate is limited irrespective of differential pressure fluctuations in the system.

The hand wheel can be used to close the valve and to open it to the preset flow.


  • Easy adjustment of the flow using the clear preset scale on the valve
  • Hand wheel provides an isolation function up to 10 bar differential pressure
  • No minimum straight pipe lengths required before or after the valve
  • Built-in P/T plugs for needle system
  • Size range: DN50 to DN150
  • Flow range: 2,480 to 195,000 l/h
  • Maximum differential pressure: 800 kPa

1-3-2 EN Frese SIGMA Compact DN50-150 JUL 15.pdf
91728 SIGMA Compact DN50-DN150 Rev0 JUN 15.pdf