Centrifugal Pumps Design and Application 2nd ed - Val S. Lobanoff, Robert R. Ross (Butterworth-Heinemann, 1992)

Table 19-2 Continued
Horizontal Alignment Movement Methods
Alignment 505
Method Advantages Disadvantages
Portable Jacks
Comealong or
Horizontal
Hoist
Portable
Alignment
Positioners
Doweling
Matching
Punchmarks
Easy to use, where
applicable. Fairly good
movement control.
Can attach to fixed anchor
point some distance away.
(See previous description in
Table 19-1.) These devices
handle vertical and
horizontal movement in the
same overall step.
Returns a machine to its
previous position on its
support.
Easy to apply, using
automatic centerpunch, in
three foot locations. Can be
used on both machine
elements, whereas doweling
is normally used only on
one.
Difficult to retrofit to
existing machines.
Not usually portable.
Individual lugs and screws
are normally needed at each
machine.
Portable clamp-on
jackscrews are sometimes
used, but usually it is
difficult to find a good place
and way to clamp them on,
A nearby fixed point to jack
against is required, and
often this is not present.
Poor control. Stick-slip
action is likely.
Dowels sometimes stick and
break off. Access for
drilling and reaming is
sometimes insufficient.
Less precise than doweling.
Does not move the machine,
but gives an indication of
where to put it to restore its
previous position.
The purpose of grouting is to fill the baseplate cavity without leaving
voids and to stiffen the baseplate, providing an even support to transmit
load into the foundation.
Grout material is normally either organic (usually epoxy plus aggregate)
or nonmetallic inorganic (Portland cement, sand, water, and nonmetallic
anti-shrink additives). The choice is based on economics and en-