3.1.7.2
Lateral Motion
The installed vibration isolation system for each piece of floor or ceiling
mounted machinery shall have a maximum lateral motion under machinery start
up and shut down conditions of not more than 6 mm 1/4 inch. Restrain
motions in excess by approved spring mountings.
3.1.7.3
Unbalanced Machinery
Provide foundation suspension systems specifically designed to resist
horizontal forces for machinery with large unbalanced horizontal forces.
Vibration isolator systems shall conform to the machinery manufacturer's
recommendations.
3.1.7.4
Nonrotating Machinery
Mount nonrotating machinery in systems which includes rotating or vibrating
machinery on isolators having the same deflection as the hangers and
supports for the pipe connected to.
3.1.7.5
Unitized Machinery Assemblies
**************************************************************************
NOTE: The following table serves only as a
guideline. Delete items that are not applicable.
**************************************************************************
TABLE 3A
Vibration Isolator Types and Minimum Static Deflection
(MSD, mm) for 100-200 mm slab on grade and column supported.
Column
Slab on earth
9.1-12 meters
12.1-15 meters
Spacing
and 0-9 meter
Equipment
Type
MSD
Type
MSD
Type
MSD
_________
(Note (1))
(Note (1))
(Note (1))
Absorption
SV-R
25.40
SV-R
44.45
SV-R
69.85
Refrigeration
Machines
Centrifugal
Chillers or
Heat Pumps
Hermetic Type
SV-B
44.45
SV-B
63.50
SV-B
88.90
Open Type
SV-1
44.45
SV-I
63.50
SV-I
88.90
Reciprocating Air
or Refrigeration
500 to 750 rpm
S-R
44.45
S-R
63.50
S-R
88.90
751 rpm and up
S-R
38.10
S-R
63.50
S-R
88.90
Reciprocating
SECTION 15070N
Page 32