Riello P 140P/NA Installation, Use And Maintenance Instructions page 46

5.3 LOW PRESSURE REGULATOR, (supplied with the burner)
Warning: Pressure regulator for liquid gas with capacity 2.5 m
Can be used with butane, propane, natural gas, compressed air. Outlet pressure adjuatable from outside.
TECHNICAL FEATURES
• Boby and cover in ZAMA 13
• Working temperature - 30°C + 60°C
ASSEMBLING INSTRUCTIONS
Make sure that there are no flames near the assembling place. if the regulator has cylinder or central group connection, check that
the fitting has a new seal.
If the regulator has piping, check the seal of the connection points by means of a soap solution (it is advisable to use spray detector
ref. 6150). The forming of bubbles will reveal possible gas leakage. Do not use flames to detect gas presence.
5.4 FUEL SUPPLY
The burners are fitted with a multifunctional system of integrated valves, that includes: double stuff-off valve, oil pressure modula-
tor to adjust oil flow at the nozzle, and 2 two-way shut-off valves to clean the nozzle (with air or steam) each time the burner stops.
A separate valve specifically for air/steam delivery for spraying has been fitted as standard equipment to burners with pressures up
to 10 bar and temperatures up to 180 °C.
Fig. 18
Air or steam
Heavy oil
2544500
LPG
3
/h equal to 5 Kg/h of gas, density 1.8 (air = 1).
• Diaphram and obturator in NBR rubber
• Project pressure 18 bar
Set on position no. 3 (Adjustment 1-10 from 20 to 90 mbar)
Pd = Outlet pressure
Pe = Inlet pressure
14 GB
Q
Q = Flow rate
D7583
Air
Steam