GAS PRESSURE/FLOW CURVES
These curves show the gas pressure in millibar (at various points along the gas train) necessary to produce
a given flow rate (cu m/h). The pressures have been measured with the burner working, with combustion
chamber pressure at 0 millibar. If the chamber is pressurized, then the gas pressure necessary will be that
given in the graph plus that in the combustion chamber.
LEGEND
1 - Cut-off cock - airtight at 1 bar and pressure drop ≤ 0.5 mbar.
2 - Vibration-damping joint.
3 - Gas pressure tap for measuring pressure.
- Gas filter.
5 - Gas pressure regulator.
6 - Minimum gas pressure control device (gas pressure switch).
7 - Class A solenoid safety valve - Closing time: ≤ 1 sec.
8 - Class A solenoid safety valve - Closing time: ≤ 1 sec. Start-up power within 10-0% of the nominal thermal
power.
9 - Gas flow regulator normally inserted in either solenoid valve 7 or 8.
10 - Combustion head.
11 - Minimum air pressure control device.
12 - Maximum gas pressure control device (over 350 kW) (on request).
13 - Seal check device (on request).
BASIC TRAIN
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