INCLINED PLATE SETTLERS
This section covers the
technical specifications for
flow control de
ck, effluent troughs and appurte
ces for a
complete working syst
Under this section of the specification, the contractor shall provide and install
the sedimentation equipment for the pre
treatment facility, including inclined
, inlet infusers, collection troughs and suppo
as shown in the
contract drawings and as described herein.
The sedimentation equipment shall include, but not be limited to, inclined plate
settlers with integrated side baffles, flow control deck, collection launders,
support structures, end
fusers, mounting brackets, anchor bolts
and fasteners, and related appurtenances. This equipment shall be provided as
an integral package by a single manufacturer who shall take responsibility for
proper functioning of the sedimentation
equipment as a system.
The contractor shall provide product data, drawings and calculations as follows:
Basic design, la
yout, including inlet
ers, weirs, and support structures.
Design velocities including inlet velocity, velocity at
through plates, velocities at flow control points a
t top of plates and at inlet to
trough and velocities
Head loss calculation through plate settling units at maximum/average design
A statement of the terms of the warranties.
List of spare parts which should be p
urchased and kept on hand.
All ancillary equipment to be provided by the manufacturer shall be listed.
Complete shop drawings of all equipment furnished including cut
components with the specific components highlighte
Operation & Maintenance Manuals
Equipment shall be stored and protected in accordance with the manufacturers
Plate packs shall be shipped on flat bed trucks to allow access by crane
provided by the contractor.
If access by crane to the basins is not possible, then the plate settlers shall be
as a pack which can be disassembled for individual component
skilled installation, supervision and start
services as specified.
Qualifications and Experience
Manufacturer shall have been in continuous business for a period of at least 10
years, engaged in the manufacture of water treat
ment equipment for
municipalities. Said manufacturer shall have
at least 10 years
experience in the
design and building of high rate lamin
ar flow clarification equipment.
Prior to bid each m
provide a list of at least ten
installations of all
stainless steel plate settlers used in municipal applications
along with names and phone numbers of references to be contacted. A list of
FRP plate installations will not be acceptable.
a certificate of NS
61 certification of the
tainless steel inclined plate settlers.
NSF approval on the material by
itself is not acceptable.
Said certificate must accompany
the manufacturer’s bid
package to the contractor befo
re bid opening.
Any manufacturer bidding alternate un
named items of equipment shall provide
a written indemnification against patent infringement to the owner.
The manufacturer of the plate settler shall guarantee all componen
ts provided by
said manufacturer including buy
not manufactured by said
anufacturer for a period of twelve (12) months, commencing from the date the
equipment is put into service, or eighteen (18) months from delivery of the
ment, whichever is shortest.
This section covers the individual components which make up the plate settler
Design & Scope of the Work
The work includes the supply, delivery, supervising the installation,
commissioning, and training in use and maintenance of the plate settler
The basins shall be in number and dimension as shown in the contract drawings
and as specified herein.
The manufacturer shall provide plate settling equipment that
will provide the
maximum settling performance
The inclined plate settler system shall comprise the following elements:
plates and frames with integral side baffles.
Stainless steel e
ffluent collection troughs
Stainless steel e
Stainless steel support beams
which span the basin to support the ends of
the plate packs. Said beams shall be provided by the manufacture of the
All wall mounted brackets as required.
The plate settler shall be manufactured by Meurer
, Inc. of
To assure system integrity and responsibility, all items of equipment described in
this section shall be manufactured by a single manufacturer regularly engaged in
the production of this equipment.
Process Requirements/Conditions (Any blanks to be filled in by manufacturer)
Design flow (process)
Maximum Influent Turbidity
Average Influent Turbidity
Required Effluent Turbidity
e Rise Rate (Hazen velocity)
Allowed Plate Efficiency
Angle of Inclination
Effluent Trough Loading
Design Velocity between plates
Design Velocity in Feed Channels
Number of Basins
Dimension of Basins
Rows per Basin
Plates per Row
The plate manufacture shall provide an effective inlet diffusion system to reduce
the velocity to
.5 ft. per second when entering the feed flumes o
The inlet velocity shall not exceed 2 ft
second in order to prevent floc damage.
The plate settling units shall operate in counter
current mode with clarified water
flowing upward while settled solids move do
wn. The incoming water shall be
near the lower end of the plate from the side to allow the settled solids to fall to
the floor of the clarifier without being re
entrained by the incoming flow.
The plates shall be arranged in packs
The packs shall
be installed on cross
beams provided by the manufacturer.
The incoming water shall be fed near the lower end of the plate from the side to
allow the settled solids to fall to the floor of the basin while minimizing re
entrainment by the incoming flow.
he plates shall be inclined at an angle of 55° from the horizontal. The plate
settlers shall have no moving parts.
at the top of the plate shall be removed in at least four (4)
points to insure even distribution across the full width of
less than four (4)
take off point
are not acceptable.
The plates shall be removable individually for
or repair and to ease
structures or troughs
required to be remove
The effluent troughs shall be located to the side of the
If each plate has a tubular top support structure, the plate shall be manufactured
of 24 gauge (minimum), T
304 stainless steel. If each plate does not
have a top
tube, then plate material shall be 22 gauge, T
304 stainless steel. FRP
(fiberglass) will not be accepted.
be self supporting and shall
not exceed the maximum
allowable deflection limits stipulated below.
The plate sett
lers shall be designed so that an operator may walk out onto the
plates at any time, even during operation, without the need to remove any
The entire top of each plate settler must be visible for inspection.
Local OSHA regulations should be fol
The plates shall be designed structurally for the following conditions:
0 lbs. per
A maximum deflection of 1/360 for all structures, troughs, etc.
A concentrated load of 250 lbs. anywhere on the flow deck (t
op tubes) or top
edge of plates.
The effluent troughs shall be located to the
side of the plate rows. Troughs
located over the plate settlers obstructing access to the tops of the plates will
The effluent collection troughs shall be manufactured of T
All brackets trough supports, reinforcing sections, stiffeners, flanges
fasteners shall be of
Structural Support System Requi
f the plate settlers
shall provide stainless steel beams to
support the plate
settler packs to insure compatibility
Support frames and beams shall be adequately sized to carry the load of the
ate settling syst
em under both wet and dry conditions without exceeding a
/360 of the span.
The manufacturer will be required to coordinate the structural details of the
design with the engineer
This will be required to determine the final loc
rough wall openings, sludge collection mechanism and other design
details which may affect the supply of structural support components.
END OF SECTION