Domestic Systems

System Diagrams, Head Losses and Dimensions

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system diagram BB

System BB/BX

1: Control Unit  
2: Flow Meter  
3: Cutoff Valve
System Capacity and pressure loss Dimensions
Nom. Cap.
Qn (m³/h)
 ΣΔp@Qn Equivalent
Kwc (m³/h)
(mwc) (kPa) Flow Meter Cutoff Valve
BB 1,5 2,4 24 3,1 ½" x 110/185 mm ¾" x 76 mm
BX 2,5 2,6 26 4,9 ¾" x 130/225 mm ¾" x 76 mm

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systemdiagram FB OptiTight

System FB/FX

1: Control Unit
2: Forward Cutoff Valve
3: Forward Flow Meter
4: Return Flow Meter
5: Return Cutoff Valve
6: Non-Return Valve
System Capacity and pressure drop Dimensions
Nom. Cap.
Qn (m³/h)
 ΣΔp@Qn Equivalent
Kwc (m³/h)
(mwc) (kPa) Flow Meter Cutoff Valve Non-Return Valve
FB OptiTight 1,5 6,7 67 1,8 ½" x 110/185 mm ½" x 55 mm ½" x 47 mm
FX OptiTight 2,5 6,3 63 3,2 ¾" x 130/225 mm ¾" x 76 mm ¾" x 56 mm

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System diagram CB/B OptiTight<sup><small>®</small></sup>

Systems CB/B, CB/X, CX/B and CX/X

1: Control Unit
2: Forward cutoff valve
3: Forward Flow Meter
4: Return Flow Meter
5: Return Cutoff Valve
6: Non-Return Valve
7: Water Flow Meter
8: Water Cutoff Valve
System Supply Water Section District Heating Section
CB/B OptiTight As System BB As System FB OptiTight
CB/X OptiTight As System BB As System FX OptiTight
CX/B OptiTight As System BX As System FB OptiTight
CX/X OptiTight As System BX As System FX OptiTight

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EAN/UPC ordering codes here

Download System BB data sheet in pdf-format

Download System FB/FX data sheet in pdf-format

Download System CB/B & CB/X data sheet in pdf-format

Download pamphlet Domestic Leakage Protection in pdf-format

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