Quantcast Operation Under Usual Conditions - TM-5-4320-242-140027

 

Click here to make tpub.com your Home Page

Page Title: Operation Under Usual Conditions
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Figure 2-3. Stopping the pump assembly (Sheet 2 of 2)
Up
TM-5-4320-242-14 Pump Assembly Flammable Liquid; Bulk Transfer; Gasoline Engine Driven; 350-GPM Capacity at 190 Foot Head; Wheel Mounted Manual
Next
Section II. OPERATION UNDER UNUSUAL CONDITIONS - TM-5-4320-242-140028
2-4. Operation Under Usual Conditions
(3) Flow rate.
Flow rate increases with
increased throttle control setting. It reaches maximum
a. General.
at full throttle (maximum governed engine speed of
(1) When the pump is in operation, check for
3600 rpm); and when cavitation occurs at impeller inlet.
normal instrument readings shown in figure 2-1.
(4) Cavitation.  Cavitation will occur when
(2) The engine governor is adjusted to limit
there are air leaks in the suction side of the pump,
maximum speed to 3600 revolutions per minute when
suction lift is too high, or the suction end of the line is
pumping.
not sufficiently submerged to prevent whirlpools.  It
(3) The throttle control permits selection of
produces an effect similar to a slipping clutch and a
power settings from idle speed (700-800 rpm) to
noise that sounds like loose pebbles ricocheting inside
maximum governed speed.
of the pump casing.
b. Operation.
CAUTION
(1) Starting.
Start the pump assembly,
Cavitation is harmful to the pump
assembly. Avoid at all times.
(2) Priming cycle. When the pump and hose
c. Performance Characteristics.
system are initially installed the priming charge is in
(1) Engine horsepower required to drive the
pump body; and the engine is started; the throttle should
pump varies with the weight of the liquid being pumped
be adjusted to 3300 rpm. The pump will operate for a
and the capacity or rate of pumping.
To avoid
short priming cycle period during which the pump is
overloading, adjust throttle control to maintain the
evacuating the air from the suction hose. During this
desired flow rate.
period it will not be pumping liquid.
(2) A composite pump performance curve is
CAUTION
shown in figure 2-4.
After  pump  has  primed  and  is
a. Pump  capacities  are  shown  in
pumping, adjust throttle setting to
gallons per minute.  Pump discharge pressures are
1800  rpm  until  discharge,  hose
shown in pounds per square inch and in feet of head of
system has filled.
the liquid pumped.
CAUTION
b. Lines of constant brake horsepower
When suction must be primed and
represent the loading of the engine.  The engine will
the discharge lines lie on a grade
give satisfactory life and performance when normal
considerably higher than the pump
operation does not exceed the continuous duty brake
and are full of liquid, follow the
horsepower for the speed at which it is operated.
procedures prescribed in figure 2-1
regarding priming check valve before
starting engine.
2-10

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business