Foundation Requirements - Xylem Bell & Gossett e-80SCXL Series Instruction Manual

4.4 Foundation requirements

Requirements
• A substantial foundation and footing should be built to suit local conditions and form a
rigid support to maintain alignment.
• The foundation must be able to absorb any type of vibration and form a permanent, rigid
support for the unit.
• If the foundation is installed over the floor, it must be properly bonded and tied to the
floor.
Recommendations
• Floor weight can be included in the Pump Foundation weight calculation within the
boundary of the Pump Foundation if properly attached/bonded to the floor.
• Pump Foundations should extend 4-6" (100-150 mm) or more from pump base plate
edges.
• The Pump Foundation width should include sufficient width to cover a 30 degree rule.
• Pump Foundation construction minimum requirements: 3000 psi (200 bar) concrete with
steel re-enforcement.
• Pump Foundations should be a minimum of 4" (100 mm) above the floor to prevent water
collection around the pump base plate.
Pump Foundation Width 30° Rule
The width of the pump foundation should be wider than the extended 30° lines. When
viewing the pump from the end of the base plate establish a vertical line through the pump
flange center. On both sides of this vertical line a line that starts at the pump flange center
and extends downward at 30°. These lines must pass through the bottom of the foundation.
Pumps on Spring Isolation Bases
• Spring mounting isolates the vibration from a pump from the floor or the foundation it is
mounted on. Spring mounting can absorb piping loads from thermal expansion or
reactions to internal pressure for properly supported piping systems. Be sure to anchor
the piping before mounting to the pump.
• The pump unit can be installed on a spring isolated base. The spring isolators are not to
be installed directly to the pump base plate given. The entire unit must be put on an
isolation base that has the spring mounts attached to it. These isolation bases are
welded structural steel with reinforcing and are filled with concrete or grout. The design
requirements and installation of these isolation bases are the responsibility of the
installing contractor.
• Use flexible piping on both suction and discharge sides with an isolation base. Flexible
piping decreases the strain on the flanges.
Series e-80SCXL INSTRUCTION MANUAL
MIN MIN
30º 30º
4 Installation
15