HomeMy WebLinkAbout200240 VIBRATION CONTROLTHE KENT
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SECTION 20 02 40 – VIBRATION CONTROL
PART 1 - GENERAL
1.01 RELATED SECTIONS:
A. Drawings, general provisions of the Contract, including General and Supplementary
Conditions, and Division-1 Specification Sections and Division 21, 22, and 23
Specification Sections, apply to work of this Section.
B. This section applies to Division 21, 22 and 23 Specification Sections.
1.02 DESCRIPTION OF WORK:
A. Extent of vibration control work required by this section is to verify that all equipment has
the proper vibration control systems.
B. Types of vibration control products specified in this section include the following:
1. Neoprene Pads.
2. Isolation Hangers.
3. Flexible Pipe Connectors.
C. Vibration control products furnished as integral part of factory-fabricated equipment are
specified as part of equipment assembly in other Sections.
D. Refer to Division 21, 22 and 23 sections for equipment foundations, hangers, sealants,
gaskets, and other work related to vibration control work.
E. Refer to Division 21, 22 and 23 sections for requirements of duct connections to air
handling equipment isolated on vibration control products.
1.03 QUALITY ASSURANCE:
A. Manufacturer's Qualifications: Firms regularly engaged in manufacture of vibration
control products, of type, size, and capacity required, whose products have been in
satisfactory use in similar service for not less than 5 years.
1. Except as otherwise indicated, obtain vibration control products from single
manufacturer.
2. Engage manufacturer to provide technical supervision of installation of vibration
control products and to provide a report on installation of mechanical system.
1.04 SUBMITTALS:
A. Product Data: Submit manufacturer's technical product data and installation instructions
for each type of vibration control product. Submit schedule showing sizes, type,
deflection, and location for each product furnished.
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B. Shop Drawings: Submit manufacturer's assembly-type shop drawings indicated
dimensions, weights, required clearances, and method of assembly of components.
Detail bases, and show location of equipment anchoring points, coordinated with
equipment manufacturer's shop drawings.
C. Maintenance Data: Submit maintenance data for each type or vibration control product.
Include this data, product data, and shop drawings in maintenance manual; in
accordance with requirements of Division 1.
PART 2 - PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS:
A. Manufacturer: Subject to compliance with requirements, provide vibration control
products of one of the following:
1. Amber/Booth Co.
2. Korfund Dynamics Corp.
3. Mason Industries, Inc.
4. Peabody Noise Control, Inc.
5. Vibration Eliminator Co., Inc.
6. Vibration Mountings and Controls, Inc.
2.02 VIBRATION CONTROL MATERIALS AND SUPPORT UNITS:
A. Neoprene Pads: Oil-resistant neoprene sheets, of manufacturer's standard hardness
and cross-ribbed or waffled pattern.
B. Vibration Isolation Springs: Wound-steel compression springs, of high-strength spring
alloy steel; with spring diameter not less than 0.8 of compressed height of spring at rated
loads. Provide minimum additional travel to solid, equal to 50% of rated deflection.
Provide spring at rated loads. Provide minimum additional travel to solid, equal to 50% of
rated deflection. Provide spring wire with elastic limit stress exceeding stress at solid
deflection.
C. Isolation Hangers: Hanger units formed with brackets and including manufacturer's
standard compression isolators of type indicated. Design brackets for 3 times rated
loading of units. Fabricate units to accept misalignment of 15 degrees off center in any
direction before contacting hanger box, for use with either rod or strap type members,
and including acoustical washers to prevent metal-to-metal contacts.
1. Provide vibration isolation spring with cap in lower part of hanger and rubber
hanger element in top, securely retained in unit.
D. Flexible Pipe Connectors:
1. For non-ferrous piping, provide bronze hose covered with bronze wire braid with
copper tube ends or bronze flanged ends, braze-welded to hose.
2. For ferrous piping, provide stainless steel hose covered with stainless steel wire
braid with NPT steel nipples or 150 psi ANSI flanges, welded to hose.
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3. Flexible Pipe Connectors: Provide neoprene or EDPM construction consisting of
multiple plies of nylon tire cord fabric and elastomer molded and cured in
hydraulic rubber presses. Provide straight or elbow connector as indicated, rated
at 125 psi at 220 deg. F (104 deg. C).
PART 3 - EXECUTION
3.01 INSPECTION:
A. Examine areas and conditions under which vibration control units are to be installed. Do
not proceed with work until unsatisfactory conditions have been corrected in manner
acceptable to Installer.
3.02 PERFORMANCE OF ISOLATORS:
A. General: Comply with minimum static deflections recommended by ASHRAE, for
selection and application of vibration isolation materials and units as indicated.
B. Manufacturer's Recommendations: Except as otherwise indicated, comply with
manufacturer's recommendations for selection and application of vibration isolation
materials and units.
3.03 APPLICATIONS:
A. General: Except as otherwise indicated, select vibration control products in accordance
with ASHRAE Handbook, 2003 Applications Volume, Chapter 47 "Sound and Vibration
Control", Table 42. Where more than one type of product is offered, selection is
Installer's option.
B. Piping: For piping connected to equipment mounted on vibration control products, install
isolation hangers as indicated, and for first 3 points of support for pipe sizes 4" and less,
for first 4 points of support for pipe sizes 5" through 8", and for first 6 points of support for
pipe sizes 10" and over.
3.04 INSTALLATION:
A. General: Except as otherwise indicated, comply with manufacturer's instructions for
installation and load application to vibration control materials and units. Adjust to ensure
that units have equal deflection, do not bottom out under loading, and are not
short-circuited by other contacts or bearing points. Remove space blocks and similar
devices intended for temporary support during installation.
B. Adjust leveling devices as required to distribute loading uniformly onto isolators. Shim
units as required where substrate is not level.
C. Locate isolation hangers as near overhead support structure as possible.
D. Flexible Pipe Connectors: Install on equipment side of shutoff valves, horizontally and
parallel to equipment shafts wherever possible.
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3.05 ADJUSTING AND CLEANING:
A. Upon completion of vibration control work, prepare report showing measured equipment
deflections for each major item of equipment as indicated.
B. Clean each vibration control unit, and verify that each is working freely, and that there is
not debris in immediate vicinity of unit that could possibly short-circuit unit isolation.
END OF SECTION