Spirax Sarco BC3150 - Page 17

IM-P403-88 AB Issue 5
17
Fig. 9 Typical application - CCD system
OK
BC3150
100
50
0
%
SP
PV
AL
Dump valve (spring-to-open).
Opens when conductivity level
is above set point allowing
contaminated condensate to
flow to drain.
Isolating valve (spring-to-close) opens to allow
clean condensate to be returned to the boiler.
Fig. 10 Alternative arrangement of a CCD system using separate valves
Spring retract
pneumatic actuator
QL
3-port diverter valve
Check valve
Bypass line
Conductivity sensor
and
temperature sensor
500 mm
head