AFPQ / AFPQ 4



A self-acting differential pressure and flow controller primarily for use in district heating systems. The controller closes on rising differential pressure or when set max. flow is exceeded.

Controller consist of:
- control valve (flange connection) type VFQ 2 / VFQ 21 with adjustable restrictor - for technical parameters look at part "Combine with..." below,
- pressure actuator type AFPQ / AFPQ 4 with two control diaphragms and a spring for differential pressure setting - see below.


AFPQ / AFPQ 4

Technical data



Code No.tmax
(°C)
FunctionSetting typeMin. Dp setting
(bar)
Max. Dp setting
(bar)
Max. operation pressure
(bar)

AFPQ

003G1029 150Diff. press. and flow controllerAdjustable0.10.740
003G1030 150Diff. press. and flow controllerAdjustable0.10.740
003G1031 150Diff. press. and flow controllerAdjustable0.151.540
003G1032 150Diff. press. and flow controllerAdjustable0.151.540

AFPQ 4

003G1033 150Diff. press. and flow controllerAdjustable0.10.740
003G1034 150Diff. press. and flow controllerAdjustable0.10.740
003G1035 150Diff. press. and flow controllerAdjustable0.151.540
003G1036 150Diff. press. and flow controllerAdjustable0.151.540