Installation
Model 3410 Installation, Operation, and Maintenance Manual
23
The installation must be evaluated to determine that the Net Positive Suction Head Available
(NPSH
A
) meets or exceeds the Net Positive Suction Head Required (NPSH
R
), as stated by the
pump performance curve.
Foundation requirements
Requirements
• The foundation must be able to absorb any type of vibration and form a permanent, rigid
support for the unit.
• The foundation must weigh at least five times the weight of the pump unit.
• Provide a flat, substantial concrete foundation in order to prevent strain and distortion
when you tighten the foundation bolts.
Foundation bolts
• Foundation bolts must be embedded in the concrete to a depth of 8âM M 12 in. (20âM M 30
cm) and locked with either a hook around a reinforcing bar or a nut and washer at the
bottom.
• Foundation bolts must have a sleeve around them at least six times the bolt diameter in
length and at least two bolt sizes larger in ID.
• If a nut and washer are used for locking, then the washer must have an OD two sizes
larger than the sleeve.
• Foundation bolts must be sized 0.125 in. (3.175 mm) less than the anchor bolt holes in the
base.
Bolt installation diagram
1. Baseplate
2. Grout
3. Alternate bolt and washer
4. Concrete
5. Bolt sleeve
Figure 9: Bolt installation
Set the baseplate
Pumps are checked at the factory for the ability to be aligned to the required tolerances. Due to
the flexibility of an ungrouted base and handling in shipment, do not assume that the unit is in
alignment when it is placed on the rough foundation. If these directions are followed, then the
required alignment must be readily achieved.
1. Perform the initial or rough alignment.
Rough alignment is designated as 0.020 in. (0.051 cm) TIR for parallel alignment and 0.009
in. (0.023 cm) TIR per inch of radius for angular alignment. Use blocks at the anchor bolts
and midway between to position the bottom of the base at a finished height with the
