SB--7--626 Page 10
Full rated pressure is full pressure
differential from the inlet flange to the
discharge flange.
SHUT DOWN
The blower should be unloaded before shut down.
Consideration should be given to possible backflow
and reverse rotation of the equipment as a result of
pressure on the discharge side of the unit. A check
valve is recommended.
Precaution should be taken to insure
that the unit cannot be started
accidentally and cause injury to
personnel or damage to equipment.
If the unit is to be shut down for extended periods of
time, it may be desirable to take some steps to prevent
rust forming inside the casing. Condensation, gas
vapors, or seal water can close up internal clearances
and cause the unit to bind. Injection of oil or other rust
retardant will help to prevent this problem.
MAXIMUM OPERATING LIMITATIONS
RPM
RPM PRESSURE
VAC
RPM
RPM PRESSURE
VAC
SIZE
MAX.
MIN.
PSI
IN HG
SIZE
MAX.
MIN
PSI
IN HG
608
2880
954
15
16 *
812
2100
716
15
16 *
612
2880
954
10
16
816
2100
716
10
16
615
2880
954
8
16
820
2100
716
8
16
618
2880
954
6
12
824
2100
716
6
12
711
2440
818
15
16 *
713
2440
818
10
16
Maximum Discharge Temperature
716
2440
818
8
16
325
_
F (162
_
C)
721
2440
818
6
12
DO NOT EXCEED THESE LIMITS
FIGURE 9 -- MAXIMUM OPERATING LIMITATIONS
Blower speed, line losses, elevation, and increased inlet temperatures
will affect the maximum operating limitations.
* Maximum Discharge Temperature for 608, 711 & 812 -- 360
_
F. (182
_
C)
