| Part
1 - General |
| 1.1
Scope of Work |
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Under
this item, the Contractor shall furnish and install ______ Conveyor
Type Sludge Collectors as manufactured by NRG Company Incorporated
or equal in ______ Tanks. The installation shall be as shown on the
drawings and in substantial compliance with these specifications.
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| 1.2
Design Criteria |
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System
design shall be based on dry tank conditions and the following: |
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1.
Bearing Friction - 0.05 per set of bearings.
2. Dry friction, UHMW on UHMW - 0.11.
3. Shaft Deflection - less than 3/64 inches per foot at mid-span.
4. Flight speed : 2 FPM in Longitudinal, 4 FPM in cross
5. Tank Dimensions and quantity: |
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_______ Mechanisms _____L x _______W x ______ SWD |
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6.
Design flow: _____ AVE ______ Peak |
| 1.3
Experience Qualifications |
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The
manufacturer of the equipment shall attest to a minimum of 10 years
of previous experience in the design and manufacture of non-metallic
rectangular sludge collectors. A minimum of three installations in
operation for more than five years shall be submitted to confirm the
requisite experience. |
| 1.4
Bolts and Anchor Bolts |
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All
flight assembly bolts, nuts and washers shall be ANSI Type 304 stainless
steel. Anchor bolts and washers shall be stainless steel and shall
comply with the anchor bolts and expansions anchors section. |
| 1.5
Surface Preparation |
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All
welds shall be thoroughly cleaned and ground smooth in preparation
for painting. All ferrous iron and steel surfaces, except motors,
speed reducers, chain shall be solvent cleaned in accordance with
SSPC-SP1 before shop primer is applied. |
| 1.6
Shop Painting |
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All
ferrous iron and steel surfaces except motors, speed reducers, chain,
and sprockets shall be given a shop coat of the manufacturer's standard
rust-inhibitive primer. Field finish coat painting is to be provided
by others. Manufacturer's primer to be compatible with the finish
coat. |
| 1.7
Power Supply |
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Power
supply to the equipment will be 230/460 volts, 60 Hz, 3 phase. |
| 1.8
Spare Parts |
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The
manufacturer shall provide a minimum of _____% (2%) spares of the
following components: FRP Flights, Longitudinal chain, Attachment
links, filler blocks, wear shoes, sprockets, shear pins, flight hardware,
wear strip, and wear strip hardware. |
| 1.9
Service |
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The
manufacturer shall provide the services of a factory representative
to oversee the start-up procedures, inspect the installation and size
the shear pins. |
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