40
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
4 - 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 regulation solenoid valve, with slow opening or opening in stages, with built-in gas flow regulator.
Closing time: 1 sec.
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
