INSTALLATION & MAINTENACE MANUAL
RCOe2100/03.06
18
It is compulsory to us only oils whose inflammable degree is higher than 185°C in case
the motor is destined to be used in potential explosive hazardous atmosphere
(Directive“ATEX” 94/9/CE).
FLAMMABLE AND SELF-EXTINGUISHING FLUIDS
Fluid characteristics
Class
Type of fluid
Water content (% in weight)
HFA
HFB
HFC
HFD
HFD/R
HFD/S
HFD/T
HFD/U
Oil-water emulsion
Water-oil emulsion
Water-based solution (mostly with glycol)
Synthetic fluids (water free)
Fluid based on phosphorous esters
Fluid based on chlorinated hydrocarbons
Fluid based on phosphorous esters & chlorinated
hydrocarbons
Other compositions
95 – 98
>40
35 – 55
0 – 0.1
Motor application limitations
Temperature (°C)
Class
Pressure
(bar)
(% nom.
pressure)
Speed
(r.p.m.)
(% max.
speed)
Power
(kW)
(% max.
power)
Maximum
Ideal
HFA
HFB
HFC
HFD
50
80
60
100
50
80
60
100
25
60
30
100
50
60
60
80
40
45
45
50
Note: For HFD/U fluids FPM seals must be used only if required by the fluid
manufacturer.
2.3.5 – Fluid filtration
To ensure a smooth and reliable motor operation, the fluid must comply with to one of the following
filtration classes:
1.
class 9 according to NAS 1638
2.
class 6 according to SAE, ASTM, AIA
3.
class 20/17/16 according to ISO 4406:1999
