7
ISRB-2009, Rev. 02_17.
Table 1, Maximum Allowable Operating Conditions
Model Speed
Temperature rise
Pressure Rise
Vacuum
o
F
O
C
PSI
mbar
''Hg
mbar
412
HPT
2000
335
168
22 (continuous)
1517 (continuous)
18 (continuous)
609 (continuous)
2000
335
168
25 (intermitten)
1725 (intermitten)
19 (intermitten)
643 (intermittent)
NOTE: Limited to minimum 1600 RPM operation at 22 PSI continuous pressure, or 18'' Hg continuous vacuum
at sea level conditions.
NOTE: Maximum intermittent pressure occurs @ 3 PSI above continuous pressure limit.
TE
OTE
Inlet
Fronts
Backs
.005 - .007
(.13-.18)
.020 - .027
(.51 - .69)
.005 - .008
(.13 - .20)
.014 - .016
(.36 - .41)
.011 - .014
(.28 - .36)
Table 2, Unit internal clearances, inches (mm)
Blower discharge temperature
Oil grade - ISO
32
o
F to 100
o
F (0
o
C to 38
o
C)
100
100
o
F to 250
o
F (38
o
C to 120
o
C)
150
Over 250
o
F (120
o
C)
220
TABLE 3, Oil Grade Requirements
Summary of Contents for Roots 412 HPT
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