6EM Thru 18GM - 1100 Vertical Turbine Pumps 19
Assembly procedure for underground
discharge (U.G.D.) units closely
parallels that of standard pumps with
above ground discharge heads. Always
refer to the Layne/Verti-Line submittal
drawings and setting plan to determine
the proper location of discharge elbow
centerline.
8. Install column flange gasket (when used)
to the upper column flange and secure to
the discharge head being sure it is timed
with the pipe tap hole of the discharge
head.
9. Coat both sides of the copper gasket
and the tension nut threads with sealant
prior to installation. Install the bronze top
tube tension nut gasket onto the top tube
tension nut.
10. Install the top tube tension nut over the
projecting line shaft and slide into
position in the discharge head.
Remembering that the tension nut
threads are left handed, thread it into the
top enclosing tube. The threads should
engage the tube smoothly and allow the
washer and nut to seat squarely in the
counterbore of the discharge head.
Torque the top tube tension nut (refer to
Table #2).
Threaded Column
Install column couplings the upper end of
the column prior to lifting. This will provide a
stop for pipe clamps during the hoisting
process.
1. Using an appropriate hoisting system, lift
the pre-assembled bowl assembly and
position it above the well. Lower the
bowl assembly partially into the well and
attach a pipe clamp (see Figure #1) to
the upper most bowl directly under the
bowl discharge flange. Lower the
assembly, allowing it to be suspended on
the foundation via the pipe clamp.
2. Before proceeding with assembly, lay out
all line shaft, enclosing tube, column and
connectors. Inspect and identify all items
and arrange them in the order in which
they will be assembled. Oversized
diameter enclosing tube sections (if
used) must be installed at the bottom of
the assembly, directly above the pump
discharge bowl. When oversized tube
sections are used, special stepped
connector bearings are provided in order
to adapt them to the remaining standard
diameter enclosing tube sections.
Pre-assemble matching sets of shaft,
enclosing tube and column by sliding
them inside each other and attaching
connectors and couplings. This will allow
each set of column/enclosing tube/shaft
to be hoisted into place and assembled
as demonstrated in Figure #3.
Non-standard lengths of column,
enclosing tube and line shafting must be
assembled at the top of the pump as
previously outlined.
Using an appropriate hoisting system, lift
the shaft/tube/column assembly and
position it above the suspended bowl.
Slide the lower end of the shaft out of the
enclosing tube about one foot.
3. Lower the shaft/tube/column assembly
into position. A line shaft coupling is to
already be in place on the pump shaft.
Assure that the threaded shafts and
coupling are clean and free of burrs.
Lubricate threads with light oil. Thread
the shafts into the coupling so that both
shafts engage the coupling equally. The
shafts should butt together solidly in the
center of the coupling. Threads should
be exposed on both ends of the
coupling. Assure that no foreign matter
exists between the shaft ends. Such a
condition will cause shaft misalignment
and will result in vibration and
accelerated bearing wear.
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