Appendix
Operation Manual - All
S
P Rock Valve Model
s
1
3
8
revD
a
te
The upper left quadrant is the beginning and end point
of the graph, and shows maximum output, pressure and
power for a specific machine. The upper right quadrant
accounts for the relationship between output of
concrete and pipeline diameters. The lower right
quadrant accounts for the resistance to flow of the
entire pipeline system, and the lower left quadrant
accounts for the pumpability of the concrete.
To use the nomograph, you begin at output required
and move in a clockwise direction until you encounter
the lines that represent your job situation. Each time
you meet the line that applies, you make a 90° turn
until you come to a point on the bottom of the upper
left quadrant that shows pressure required (Figure 66).
To illustrate the use of a nomograph, we will use a
hypothetical job situation with the following
specifications:
•
We will need an average output of 45 cubic
yards/hr, but we will be pumping only 75% of
the time. The rest of the time will be spent
moving hose, removing pipe lengths, waiting
for concrete trucks, etc. This means that when
we are actually pumping, we will need an
output rate of 45
÷
.75 =
60
yd
3
/hr.
•
We will use 5" diameter pipeline for our job.
•
We will have the following pipeline lengths: 30
ft. horizontal, 1 long sweep elbow, 250 ft.
vertical, 2 long sweep elbows, 150 feet
horizontal, 40 feet of 5" rubber hose.
•
We will specify a slump of 3-4", and use the 3"
line on the chart.
•
In addition, when we add the pressure for the
vertical run we will have to add 1.1 times 250
ft. = 275 PSI.
All of these criteria will be explained in detail as we go
through the individual quadrants.
A De
s
cription of the Quadrant
s
a. The upper left quadrant describes the power
curve of a given Kw rating, and the maximum
flow and maximum pressure of a particular
concrete pump.
Figure 66
Moving around a nomograph
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Страница 14: ...Introduction Operation Manual All SP Rock Valve Models 12 revDate NOTES Home TOC TOC Print Print ...
Страница 70: ...Overview Operation Manual All SP Rock Valve Models 68 revDate NOTES Home TOC TOC Print Print ...
Страница 100: ...Operation Operation Manual All SP Rock Valve Models 98 revDate NOTES Home TOC TOC Print Print ...
Страница 126: ...Maintenance Operation Manual All SP Rock Valve Models 124 revDate NOTES Home TOC TOC Print Print ...
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