Flowserve QLQ Vertical Worthington - Manual (Page 25)

QLQ, QLQC USER INSTRUCTIONS ENGLISH 87900027 – 06/14
Page 25 of 61
The two plates are installed on the foundation and
aligned with the anchor bolts. Level the plates with
the help of a machinist’s level to within 0.25 mm per
m (0.0035 in. per ft.). Grout the foundation plates.
Allow the grout to set for at least 72~80 hours before
the pump is installed Tighten the nuts.
Proceed according the procedure described in
section 4.1.4.2.
4.3.2.2 Pump equipped with foundation plate
CONCRETE
FOUNDATION
SOLE
PLATE
DISCHARGE
HEAD FLANGE
Figure 4.7
Some pumps are mounted on a separate plate known
as soleplate. In such cases, the level shall be set with
a master level or a precision machinist’s level. The
mounting surface needs to be leveled to within 0.25
mm per m (0.0035 in. per ft.) using shims and
grouted.
Accurate shimming and grouting of the soleplate is
very important. Record the leveling data for future
reference. Grout the soleplate and allow to set at least
72~80 hours (cure as required) before the pump is
lowered into the pit. Align the discharge head bolt
holes with the anchor bolts. torque the nuts to the
required level.
4.3.2.3 Pump equipped without foundation plate
HEAD FLANGE
CONCRETE
Figure 4.8
Some wet pit pumps are installed directly by using
the flange that comes as an integral part of the
discharge head. The pump is lowered into the pit and
aligned with the anchor bolts.
The mounting flange is shimmed to achieve required
level by using a precision machinist’s level. The
pump is to be leveled to within 0.25 mm per m
(0.0035 in. per ft.). The data to be recorded for future
reference. Anchor bolt nuts are tightened sufficient
enough to hold down the pump in place.
Grout is poured and allowed to set for at least 72~80
hours (cure as required) before any further work is
done on the pump.
If leveling nuts are used to level the
base, they must be backed off as far as possible prior
to grouting.
Always shim near foundation bolts and then back off
the leveling nuts. Now tighten the foundation bolts. If
done otherwise there is a risk of significantly lowering
the structural natural frequency that could result in
separation of the base from the grout.
Directly mounted pumps are not user
friendly for service. Re-installation of these pumps
requires re-leveling and re-grouting.
4.4 Grouting
Where applicable, grout in the foundation bolts.
After adding pipe work connections and re-checking
the coupling alignment, the mounting plate/soleplate
should then be grouted in accordance with good
engineering practice. If in any doubt, please contact
Flowserve service center for advice.
Grouting provides solid contact between the pump
unit and foundation that prevents lateral movement of
running equipment and dampens resonant vibrations.
Foundation bolts should only be fully
tightened after the grout has been cured.