The inlet supply system must provide the pump with Net
Positive Suction Head (NPSH) equal to or greater than
that required by the pump at any capacity on its operating
curve. If you need assistance to calculate or measure
suction supply system NPSH, contact your Peerless
Pump representative.
Related information
.4.2 Foundation, grout and anchor bolt installation
4
.3
Foundation
Install the pump on a foundation rigid enough to support the weight
of the pump plus the fluid in the pump. Weak foundations or
foundations on unstable ground can cause misalignment, vibration,
and even foundation failure.
See standard engineering reference manuals for
allowable bearing loads of structural steel and floors.
Local building codes may recommend allowable bearing
loads for different soil types.
The mass of the foundation should be at least five times that of the
rotating element of the pumping equipment for a permanent and
rigid support for the base plate. Even then, it is possible the
foundation mass might not be adequate, so a civil engineer should
review and approve the steel support structure before pump
installation. Ensure proper foundation and base plate bolt sizing,
particularly on high-pressure pumps, to adequately restrain reaction
forces such as from directional flow change, system transients and
sudden valve closure. Concrete foundations may have anchor bolts
installed in sleeves that are two times the diameter of the bolt to
allow alignment and should be located by a drawing or template.
Ensure that a civil engineer reviews and approves a steel
support structure before pump installation.
Whether the base plate is installed prior to the pump installation or
at the same time, the pump must be attached to the base plate. To
avoid excessive vibration, ensure the pump feet are clean and free
of burrs and nicks. Follow the instructions in this manual for leveling
and grouting. After the grout cures (48 hours minimum), the pump
unit may be finished for pump installation. We do not recommend
installing the base plate without the pump.
Position the foundation and the foundation bolts so that
pump inlet and outlet flanges align with the outlet pipes.
Related information
.4.2 Foundation, grout and anchor bolt installation
4
.3.1
Seismic analysis
When the pump is located in a seismically active area or in certain
critical installations, ensure that the pumps, supports, and
accessories are earthquake-resistant. The design specifications for
earthquake resistance vary depending on the geographical area
and the class of the equipment. The class of the
equipment depends on defining how critical is the survival of the
equipment, the characteristics of the structure's response to
accelerations, and the foundation supporting the pump.
If a seismic analysis is required, please refer to the
governing bodies recommended for grouting and
foundation requirements.
The customer must supply complete specifications for earthquake-
resistance requirements including seismic criteria, acceleration,
magnitudes, frequency spectrum, location and direction relative
to the pump and qualification procedure.
Related information
4
.4 Installation preparations
4
.4.1
Pre-installation check
All pump parts are carefully inspected before leaving the factory but
may become soiled or damaged in shipping and handling or storage
at site. The installer must ensure that all parts are clean and
undamaged before installation.
Do not step or walk on the pump components. Do not
place other parts or equipment on the pump components.
Use appropriate solvent to wash off any protective coating from the
shaft sections and wipe thoroughly clean and dry.
Dirt, sand, etc. in the system will cause premature wear on the
critical pump internal surfaces, resulting in reduced pump
performance.
4
.4.2
Foundation, grout and anchor bolt installation
1
2
3
4
5
6
7
8
11
9
10
TM054775
Fig.
Foundation, grout, and anchor bolt installation
Position
Description
1
Finished grouting
2
0.75-1.25 in (19-32 mm) allowance for grout
3
Formwork
4
Pipe sleeve
5
Washer
6
Base plate
7
0.2-0.4 in (5-10 mm)
8
Lug
9
Grout
10
Wedges or shims left in place
11
Top of foundation
Related information
1
0
English (US)