Gardner Denver GAA_ _ P Series, Руководство по эксплуатации и обслуживанию, Страница: 21 / 46

SB-7-621 Page 20
SECTION 4
OPERATION
Future operating problems can be avoided if proper precautions are observed when the equipment is first put into
service.
Before starting under power, the blower should be turned over by hand to make certain there is not binding or
internal contact.
Each size blower has limits on pressure differential, running speed and discharge temperature which must not be
exceeded. These limits are shown in “Maximum Operating Limitations”, FIGURE 4-1, below.
Operating beyond the specified operating limitations will result in damage to the unit.
It is important that the pressures and temperatures are measured directly at the ports of the blower to avoid error
that may be caused by intervening pipe runs, fittings, etc.
Relief valves must be used to protect against excessive pressure or vacuum conditions. These valves should be
tested at initial startup to be sure they are adjusted to relieve at or below the maximum pressure differential rating
of the blower.
NOTICE
Relief valves should be placed as close as possible to the blower inlet or discharge.
In some instances, pressure may be relieved at a lower point than the blower maximum in order to protect the
motor or the equipment served by the blower.
Discharge temperature switches are recommended to protect against excessive inlet restriction or inlet
temperatures. Check valves in the discharge line on pressure blowers and in the inlet line on vacuum blowers are
recommended to protect the blower from motoring backwards when shut down under load.
LIMITATIONS
For information regarding limitations, refer to FIGURE 4-1, below.
MAXIMUM OPERATING LIMITATIONS
SIZE RPM
PRESSURE
PSI
VAC
IN HG
DISCHARGE
TEMPERATURE ° F
2LP 5275 7 14 285
2MP 5275 12 15 315
3LP 3600 7 14 260
3MP 3600 12 15 280
3HP 3600 15 16 320
4LP 3600 7 14 260
4MP 3600 10 16 285
4HP 3600 15 16 310
5LP 2850 7 14 260
5MP 2850 13 16 280
5HP 2850 15 16 300
DO NOT EXCEED THESE LIMITS
NOTICE
Blower speed, line losses, elevation, and increased inlet temperatures will affect the
maximum operating limitations.
FIGURE 4-1 – MAXIMUM OPERATING LIMITATIONS