PB3 User Instruction
Page 20 of 39
3.4.7 Gib block installation for hot applications
Gib blocks are installed to control the direction of the growth while maintaining pump-driver coupling
alignment. They are installed after base plate has been leveled and grouted, suction and discharge piping
connected, and final shaft coupling alignment is completed.
Gib blocks are shipped loose and field installed at the site. The following procedure must be followed for correct
installation of gib blocks.
a)
Fully torque the hold-down bolts in the driver end of pumps feet to torque values listed in the instruction
manual
.
b)
Install the dowel pins in the pump drive end foot by drilling the foot and the base plate for the tapered
dowel provided.
c)
Position the gib blocks to obtain a 0.254 mm (0.010 in.) clearance between the gib block and the side of
the non-drive end pump foot as noted on the attached figure. Drill and tap the cap screw holes for the
gib blocks.
d)
Tighten the hold-down bolts for the gib blocks.
e)
Install the dowel pins in the gib blocks by reaming the block and base plate for the tapered dowel
provided.
f)
Tighten the hold-down locknuts on the non-drive end pump feet to establish a 0.051 mm (0.002 in.) gap
between the locknut and the pump foot.
3.4.8 Hot alignment check
A hot check can only be made after the unit has been in operation a sufficient length of time to assume its
NORMAL operating temperature and conditions. If the unit has been correctly cold set, the offset misalignment
will be within 0.076 mm (0.003 in.) TIR and the angular misalignment will be within 0.0254 mm (0.001 in.)
TIR when in operation. If not, make adjustments.
WARNING
Do not attempt any maintenance, inspection, repair or cleaning in the vicinity of
rotating equipment. Such action could result in injury to operating personnel
WARNING
Before attempting any inspection or repair on the pump the driver controls must be
in the "off" position, locked and tagged to prevent restarting equipment and injury
to personnel performing service on the pump.
3.5 Piping
Caution
The following information regarding piping is only offered as a general guideline to
the customer. PUMPIRAN requires that all piping and related systems be
designed/installed in accordance with specifications set forth in Chapter 6, Piping
from API recommended practices 686/PIP REIE 686, First Edition.
The design of piping, and related systems, is not the responsibility of PUMPIRAN. It is therefore recommended
that the customer consult a competent specialist skilled in the field of piping, to insure proper design/installation
of all piping.
