12
GB
0
5
10
15
20
25
30
40
50
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
kW
mbar
2
1
2
2
1
1
3
3
3
1250
1300
4
4
4
PG
Pt
Pe
Pv
CT
VCV 240
(inlet pressure)
VCV 350
(inlet pressure)
VGD 20.403
(inlet pressure)
VGD 20.503
(inlet pressure)
Pv
(pressure downstream of the ramp)
0
5
10
15
20
25
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
kW
1250
1300
mbar
4
4
VGD 20.503
(inlet pressure)
Pv
(pressure downstream of the ramp)
NATURAL GAS
LPG
PRESSURE/FLOW RATE CURVES G 1300
They indicate the gas pressure in mbar, (in the various points of the gas ramp) necessary to obtain a determined
flow rate in m3/h. The pressures are measured with the burner functioning and are intended with combustion
chamber at 0 mbar. If the chamber is pressurised, the gas pressure necessary will be that of the diagram plus the
value of that of the chamber.
M
Pe = Pressure upstream from the valves unit
Pt = Pressure at the combustion head
Pv = Pressure downstream of the ramp
PG = Minimum gas pressure pressure switch
CT = leak-tightness pressure switch
ATTENTION: the Pt-Pv gas pressure outlets have a screw closing pin. Ensure that the Pt - Pv gas outlets
are closed during normal operation.
NOTE: For reducer positioning (gas diaphragm) see GAS DIAPHRAGM POSITIONING” paragraph.
With reducer d. 30 mm
Without reducer
With reducer d. 30 mm
Without reducer