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earth safe
Fuel Systems for Critical Power
Pipin
The cause of many pumping problems can be traced to suction piping. It should always be as
large and short as practical. Before starting layout and installation of your piping system,
consider the following points:
1. Never use piping smaller than the pump port connections.
2. Be sure the insi e of the pipe is clean before hooking it up.
3. Foot valve — When pumping a light liqui with a suction lift, a foot valve at the en of the
suction piping or a check valve in the first horizontal run will hol the liqui in the line an
make it easier for the pump to prime. Be sure the foot or check valve is big enough so that it
oesn’t cause excessive line loss.
4. When approaching an obstacle in the suction or ischarge line, go aroun the obstacle
instea of over it. This minimizes air pockets air pockets which make it har for the pump to
prime.
5. For a suction line with a long horizontal run keep the horizontal portion below the liqui
level if possible. This keeps the pipe full so the pump oes not have to remove so much air
when starting.
6. Be sure allowance is ma e for expansion an contraction of the piping. Loops, expansion
joints, or unsecure (this oes not mean unsupporte ) runs shoul be use so the pump
casing is not stresse by the piping..
7. Strainer — The pump inlet strainer will keep foreign objects from going into the pump. The
strainer is particularly important at start up to help clean the system of wel bea s, pipe
scale, an other foreign objects.
8. The pump shoul not be use to support the piping. The weight of the pipe shoul be
carrie by hangers, supports, stan s, etc.
9. When fastening the piping to the pump it shoul not be necessary to impose any strain on
the pump casing. “Springing” or “ rawing” the piping up to the pump will cause istortion,
possible misalignment, an probable rapi wear of the pump. Do not use the pump to
correct errors in piping layout or assembly.
10. All joints of the piping system shoul be tight; pipe sealer will help assure leak-free threa e
joints. Leaks in the suction line re uction in capacity.
11. Provi e a pressure relief evice in any part of a pump an piping system that can be valve
off an , thus, completely isolate . The rise in temperature causes the liqui to expan ; if
there is no provision for pressure relief in the close off section, there is a chance that the
pump or piping will rupture.
EMERGENCY POWER FUEL SYSTEMS
Model M200
Duplex Fuel Pump
INSTALLATION, OPERATION, AND MAINTENANCE
