MIL-HDBK-1003/7
Table 6 (Cont.)
Equipment Selection For Boiler Plants
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* Equipment
*
Size or Type
Pertinent Information
*
*
* Condensate
*
Two motor driven pumps
Provide bypass orifice at
* transfer
*
per boiler. Each pump
each pump. Discharge of
* pumps
*
to be 1.25 x boiler
bypass to go to condensate
*
* MIL-P-17552
steaming capacity.
tank. Consider variable
*
*
Consider one steam
speed drive if over 10 HP.
*
*
turbine driven pump
Horizontal split case or
*
*
in lieu of one of
vertical can type pumps.
*
*
the motor driven
*
*
pumps.
*
*
* Feedwater
*
Two element (steam
Use three element pump
*
* regulators
flow/drum level)
control where boilers are
*
*
pump control or
operated simultaneously or
*
*
three element (drum
have severely fluctuating
*
*
level, steam flow,
loads.
*
*
water-flow)
*
*
pump control.
*
*
* Steam Turbines
*
Size for maximum
Can be used for condensate
* for Mechanical
*
horsepower required
transfer pump, boiler feed
* Drive MIL-T-18246, under all possible
*
pump, forced draft fan,
*
* Steam Turbines
operating conditions
induced draft fan, over
* for Mechanical
*
fire fan. Use to reduce
* Drive
*
electric consumption of
*
*
heating plant. Assure
*
*
sufficient electric
*
*
auxiliaries to preclude
*
*
atmospheric exhaust
*
*
during low-load periods.
*
*
Consider both motor drive
*
*
and steam turbine drive
*
*
with overrunning clutch
*
or units to permit
*
*
instantaneous changeover
*
*
from one drive to the other.
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