NMFIRE 500 GPM Electric Motor Driven Split Case Fire Pump
Fire pumps are used to supply water for automatic sprinkler
systems, standpipes or fire hydrants.
NMFIRE Split case are pumps are rated 300, 450, 500, 750, 1000,
1250, 1500, 2000, 3000,
3500, 4000, 4500, 5000, 5500, 6000, 6500, 7000, 7500 and 8000 GPM.
All fire pumps are rated
at 40 pounds per square inch or more of boost.
Fire Pumps of the type described shall meet the following basic
requirements:
1. Each pump is to be tested hydrostatically for not less than 5
miniutes. The test pressure is to be
not less than 1.5 times the max. working pressure of the pump, but
in no case less than 250 psi
(1724 kpa).
2. A pump shall develop not less than 65 percent of rated total
head when discharging at 1.5 times
rated capacity. The maximum net pressure for a fire pump shall not
exceed 140 percent of rated
head.
3. The maximum pump brake horsepower shall not exceed the HP rating
its driver, including service
factor.
ELECTRIC MOTORS:
NFPA 20 requires all fire pump motor drivers to be rated for
continuous duty and sahll not be used at
voltages in excess of 110% of rated voltage. At rated voltage and
frequency, the full load ampere rating
shall not be exceed (excepts as allowed by the service factor on
motor nameplate) under any pumping
condition.
MOTOR CONTROLLERS:
The motor control panel equipment shall be factory assembled,
wired, tested, and spcifically approved for
fire pump service. Combined manual and automatic type to
incorporate the following:
a. Isolating switch
b. Externally operable, quick breaking disconnect
c. Time delay locked motor over current protection set at 600% of
motor full load current for 20 seconds.
d. Pressure switch with high and low pressure setting
e. Motor starter of the magnetic type
f. Pilot lamp to indicate circuit breaker closed and power
available
g. Phase revversal visible indicator pilop lamp.
STANDARD EXPORT SEAWORTHY PACKING
