Finish Thompson UC - Manual (Page 9)

9
Grout the base plate
1. Ensure that the area that is to be grouted is clean. Follow instructions from the grout manufacturer.
2. Erect a dam around the foundation. Insure that the foundation is thoroughly wetted.
3. Pour grout in the dam and completely fill under and around the base plate to the level of the dam. Make sure that any air
bubbles are removed as it is poured. It is recommended that non-shrinking grout be used.
4. Permit the grout to set at least 48 hours.
5. Tighten the foundation bolts.
CAUTION: Do not operate the pump until it is securely fastened!
Piping
1. The pump should be installed as near to the suction source as possible.
2. It is recommended that pipes are supported as close as possible to the pump and all flanges line up. This will minimize any
pipe strain.
3. The suction side of the pump should be as straight and short as possible to minimize pipe friction or a length at least ten times
the inlet diameter should follow any elbows.
4. The suction or inlet line should be at least as large as the suction inlet port or one pipe size larger so that it does not affect the
NPSHa. Do not reduce the suction line size.
5. The suction line should not have any high spots. This can create air pockets. The suction piping should be level or slope
slightly upward to the pump. See figure 8.
6. The NPSH available to the pump must be greater than the NPSH required. Filters, strainers, and any other fittings in the suction
line will lower the NPSH available and should be calculated into the application.
7. A check valve and a control valve (if used) or isolation valve should be installed on the discharge line. The control valve is used
for regulating system flow. An isolation valve is used to make the pump accessible for maintenance. It is recommended that
the control or isolation valve be closed prior to stopping or starting the pump. The check valve is installed to protect the pump
against water hammer damage. These recommendations are particularly important when the static discharge head is high.
8. It is advisable to install a flush system in the piping to allow the pump to be flushed before the pump is removed from service.
9. When connecting piping to the pump suction and discharge flanges, if lock washers are used, install under the head of the bolt.
See figure 9.
figure 8
RECOMMENDED
NOT
RECOMMENDED
figure 9