DRESSER RB 4700 Betriebsanleitung Seite 35

Maintenance
Maintenance is extremely dependent on the quality of the gas used (humidity, impurities, gasoline), the efficiency of
the filter used upstream of the regulator, the pressure and flow levels: it is recommended to install upstream of the
regulator a filter, which traps solid and liquid particles present in the fluid that would otherwise impair the proper
functioning of the apparatus. Depending on the gas moisture content, contamination and chemical composition,
occasional cleaning may be required.
Caution: before any service operation, be sure that upstream stop valve is closed and the gas installation is de-pres-
surized.
Frequence of the minimum substitution according to the maintenance interval for all the soft parts, including
O-rings, membranes, diaphragms, as well as for the metallics parts more used like valve seat, filters, stems – mainte-
nance sparepart kits are available for regulators.
P inlet
Bar Inspection
0,04<P<0,5 1 every 2 years
0,5<P<5 1 per year
5<P<12 1 per year
Flow Capacity
Qnom >1200kW
Functional
Maintenance
checks
1 every 2 years ever 8 years
1 per year every 7 years
1 per year every 5 years
Qnom <1200kW
Functional
Maintenance
checks
every 3 years
every 2 years
based on needs
1 per year
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