Operation
All
S
P Rock Valve Model
s
Startup 250:Users:Danny:Desktop:Operation manuals:line
pumps:All SP Rock Valve models:Frame files:operation.fm
Operation Manual -
85
Point out the emergency stop switches to the driver if
you will be standing somewhere other than at the
operator’s panel. That way, the driver could warn you
or stop the machine if he sees a dangerous situation
develop.
Always keep an eye on the point of discharge, or your
spotter. If the hose man is giving you signals, he will
have his hands full and will not be able to jump up and
down or wave his hands to get your attention. On a
typical job site, it is doubtful that you could hear him
yelling.
As the day progresses and the crew removes pipe
sections from the end of the slickline, wash the pipes,
clamps and gaskets with water (Figure 31). If you don’t
wash them until the pour is finished, you will not be
able to get the hardened concrete out of them. This job
can be done between loads of concrete, or by an oiler
or laborer at almost any time.
Time Con
s
traint
s
Remember, if anything goes wrong on the unit while it
is pumping, you only have 15 to 30 minutes to solve it
before the concrete sets (less with old concrete on a hot
day, more with fresh concrete on a cool, cloudy day). If
you know that it will take longer than that to fix, clean
out before you begin repairs. If concrete is beginning to
set, you will have to clean out in a very quick and
efficient manner. There are special instructions for
quick clean-out, which you will find in this section
(Section 5), starting on page 96. If you keep your head
and keep moving, you can usually avoid the dreaded
“pipe party”, even with unfavorable pumping
circumstances. Old concrete and hot days make up the
worst case scenario. Under certain hot weather and old
concrete circumstances, the concrete may go from
being pumpable to setting very, very quickly. This is
called “flashing”, and if it happens to you, you may
lose some pipe. See also the section on delays
described in Item on page 86.
If you are pumping in very cold conditions (below
+10° F.) the concrete could freeze. In this case, the
machine will act like the concrete has set, but all is not
lost. As long as the concrete is frozen, it cannot
continue to set. If this happens to you, you are done
pumping for the day. You will not be able to clean out
at the job, unless they have a heated area where you
could move the pump for clean-out. If not, inform site
management and your company, load the pipe and
hose, gather up your things and find a heated area for
clean-out. Further information can be found in the
chapter entitled, “Cold weather pumping” beginning
on page 96.
Figure
3
1
Wa
s
h
s
lickline a
s
it i
s
removed
from the pour
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Страница 8: ...Table of Contents Operation Manual All SP Rock Valve models viii revDate Home TOC TOC Print Print ...
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 ...
Страница 159: ...Alphabetical Index Operation Manual Line pumps ALPHABETICAL INDEX swg99a001 eps Home TOC TOC Print Print ...
Страница 164: ...Alphabetical Index Operation Manual All SP Rock Valve Models 162 revDate Home TOC TOC Print Print ...