Satellite Slide Tank - Manual (Page 19)

• When the tank is full, close the fill valve
and turn off the engine in order to shut
down the pump
Pay close attention to the fill indicator on
your tank so that you can promptly shut
down your vacuum pump when the tank
is full.
19
OPER
A
TION
If for any reason you can’t visually tell when
the tank is full, listen for a change of sound
in the vacuum pump. When the tank is full,
the primary shutoff stops airflow, creating a
noticeable change in the sound of the
vacuum pump.
Also, in the unlikely event that the primary
or secondary shutoff activates due to
extreme air velocity, promptly shut down
your vacuum pump. Again, a change of
sound in the vacuum pump is your
indicator to stop operation. This will
deactivate the shutoff, at which point you
can resume operation.
`
NOTICE : DO NOT operate the pump
faster than the recommended rpm.
Operation above the recommended rpm
will cause the pump to overheat,
resulting in damage to the pump.
`
NOTICE : Shut down your vacuum pump
promptly when the tank is full. In addition,
any time the primary or secondary shutoff
activates, stop pump operation. At the point
when either of the shut-offs activates, the
pump is susceptible to over-heating if kept
running. This can damage your pump.
Vacuum in. Hg. Lift Height (for water)
10 11'4"
15 17'
20 22'8"
21 23'8'
22 24'9"
23 26'
24 27"2"
25 28'4"
26 29'5"
27 30'6"
28 31'7"
29 32'8"
30 34'
Mechanics of Pneumatic-Transport
(transfer by means of vacuum)
A vacuum, as pertaining to pumping of
liquid waste, is a space with some of the
air removed from it. Your vacuum pump
extracts air from your vacuum tank,
lowering the pressure inside of it.
Atmospheric pressure pushing against the
liquid does the actual loading of your
vacuum tank. The liquid flows toward the
area of lower pressure created in the tank.
Vacuum is measured in inches of Mercury
(in.Hg. or “Hg.). This type of measurement
is based on a barometric mercury column.
Standard atmospheric pressure at sea
level causes the mercury in this instrument
to rise 30 inches up into a glass tube with a
vacuum. The dial type pressure/ vacuum
gauge on your tank (Figure 3.2, page 14)
gives the same in.Hg. reading as a
mercury column.
Usually, 15" Hg of vacuum is sufficient to
load the tank without placing undue stress
on your pump. Table 3.3 lists the
approximate vacuum levels required to lift
water a given distance. However, these
figures must be adjusted to compensate
for the weight of the material and the
length and diameter of suction hose being
used. Effluent or seepage may often weigh
more than water. Also, pumping these
products through a hose induces friction.
Both of these factors result in reduced
lifting efficiency.
In addition, both attainable vacuum and
pumping height decrease at higher
altitudes. This is because atmospheric
pressure decreases with height. Therefore,
Table 3.3 Vacuum Levels vs Lift Height