32
Adjusting light oil flow rate
The light oil flow rate can be adjusted choosing a by-pass nozzle that suits the boiler/utilisation output and setting the delivery and
return pressure values according to the ones quoted on the chart below and the diagram on Fig. 15-Fig. 32 (as far as reading the pres-
sure values, see next paragraphs).
Fig. 15
Example (Bergonzo):
if a 220kg/h flow rate BERGONZO nozzle is provided, set the return pressure at 11bar, supply at 20bar on the
delivery to get a 220kg/h flow rate. If the return pressure needed is 5bar, instead, act on the
V
adjusting screw on the pressure gover-
nor (see chapter on page 32). The flow rate will then be about 95kg/h (see the example showed on the Bergonzo diagram-Fig. 15).
NOZZLE
DELIVERY
PRESSURE
bar
RETURN
PRESSURE MAX.
bar
RETURN
PRESSURE MIN.
bar
BERGONZO A3
20
11 ÷ 13
6 (recommended)
FLUIDICS WR2
25
20
7 (recommended)
Summary of Contents for HTP90A
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