Specifications

25FP-250-00
3
07/2012
Specifications Information and Repair Parts Manual 25FP Series
x
25FP Fire Pump Series
If a vortex is noticed at suction line end submerge end deeper.
OPERATION
Review all SAFETY information in pump general safety manual.
Follow the instructions on all tags, labels and decals attached to
the pump.
Priming
Install the pump and piping as described in INSTALLATION section of
this manual. Make sure that all connections are air tight, and that the
pump is positioned level on a solid foundation.
Since this pump is not self-priming, it is equipped with either an
exhaust primer or a hand operated diaphragm priming pump.
Exhaust Primer
The exhaust primer utilizes engine exhaust gases directed through a
venturi to create a vacuum and draw air out of the suction line and
pump casing.
The exhaust primer is capable of priming a pump with a maximum
priming lift of 15 feet (4.6 meters). If the pump does not prime in a
reasonable length of time, check the suction line for leaks.
To prime the pump with the exhaust primer:
 Close the exhaust primer handle (C27) and open ball valve
(B32) in pump suction vacuum line.
 Start the engine according to engine manufacturer
instructions.
 Operate the engine at maximum throttle speed and allow
primer to remove air from suction until liquid flows from
primer ejector (C7).
 When the pump is fully primed, close the vacuum line valve
and release the exhaust primer handle.
Hand Primer
The hand primer is a positive displacement diaphragm pump. Hand
priming pump is mounted directly to roll frame on a bracket (A37) that
includes a pocket to hold the primer handle (C27). Priming relies on
the operator manually stroking the handle to remove the air from the
suction line and pump casing.
To prime the pump with the hand primer:
 Remove priming pump handle from bracket and install in
priming pump.
 Open ball valve (B32) in pump suction vacuum line.
 Operate pump handle up and down until pump casing is full
of liquid and water starts to enter the priming pump.
 When the pump is fully primed, close the vacuum line valve.
 Start the engine according to engine manufacturer’s
instructions.
Once fully primed, reduce engine speed slightly and slowly open the
discharge throttling valve. The discharge line should be filled slowly to
prevent damage to the piping, hose, or gaskets. When the discharge
line is completely filled, adjust the discharge throttling valve and
engine speed until desired operating point is reached.
Leakage
No leakage should be visible at pump mating surfaces, or at pump
connections or fittings. Keep all line connections and fittings tight to
maintain maximum pump efficiency.
Liquid Temperature and Overheating
The maximum liquid temperature for the pump is 180°F (82°C). Do not
apply it at a higher operating temperature than is recommended.
Overheating can occur if operated with a closed valve in the discharge
(valves should not be installed in suction line). Operating against a
closed valve could bring the liquid to a boil, build pressure, and cause
the pump to rupture or explode. If overheating occurs, stop the pump
and allow it to completely cool before servicing it. Refill the pump
casing with cool liquid.
Do not remove plates, covers, gauges, pipe plugs, or fittings from
an overheated pump. Vapor pressure within the pump can cause
parts being disengaged to be ejected with great force. Allow the
pump to completely cool before servicing.
Strainer Check
Check the suction strainer regularly, and clean it as necessary. The
strainer should also be checked if pump flow rate begins to drop. If a
suction vacuum gauge has been installed, monitor and record the
readings regularly to detect strainer blockage. Vacuum reading will
increase, at a given flow rate, if strainer becomes blocked.
Never introduce air, steam, or high water pressure into the casing to
remove blockage in suction line or strainer. This could result in
personal injury or damage to the equipment.
Stopping
Never halt the flow of liquid suddenly. If the liquid being pumped is
stopped abruptly, damaging shock waves can be transmitted to the
pump and piping system. Close all valves slowly.
If the application involves a high static discharge head, gradually close
the discharge throttling valve before stopping the pump. The pump
discharge check valve may be damaged if liquid in the discharge
piping suddenly reverses direction when the engine is stopped.
Cold Weather Preservation
In below freezing conditions completely drain the pump and piping
system to prevent damage from freezing. If the pump will sit idle for
more than a few hours remove the casing and make certain all liquid
has been drained. Clean any solids from casing.
MAINTENANCE
Preventative Maintenance
Since pump applications are seldom identical, and pump wear is
directly affected by such things as the abrasive qualities, pressure and
temperature of the liquid being pumped, this section is intended only
to provide general recommendations and practices for preventive
maintenance. Regardless of the application however, following a
routine preventive maintenance schedule will help assure trouble-free
performance and long life from your pump.
Record keeping is an essential component of a good preventive
maintenance program. Changes in suction and discharge gauge
readings (if so equipped) between regularly scheduled inspections can
indicate problems that can be corrected before system damage or
catastrophic failure occurs. The appearance of wearing parts should
also be documented at each inspection for comparison as well. Also, if
records indicate that a certain part (such as the shaft seal) fails at
approximately the same duty cycle, the part can be checked and
replaced before failure occurs, reducing the unscheduled down time.
For new applications, a first inspection of wearing parts at 250 hours
will give insight into the wear rate for your particular application.
Subsequent inspections should be performed at regular intervals.
Critical applications should be inspected more frequently.
 General condition (temperature, unusual noises or
vibrations, cracks, leaks, loose hardware, etc)…DAILY
 Pump performance (gauges, speed, flow)…DAILY
 Impeller wear rings (excessive wear, poor
performance)...SEMI-ANNUALLY
 Mechanical shaft seal (excessive wear, heat damage,
leakage, etc)…SEMI-ANNUALLY