2.6.7.2
Effluent Rate Controllers
Each filter shall be provided with an effluent rate of flow controller
consisting of a [flanged venturi tube] [butterfly valve] [electronic
differential pressure transmitter] [_____].
2.6.7.3
Backwash Controller
One backwash rate of flow controller shall be provided. The backwash rate
of flow controller shall consist of a [flanged venturi tube] [butterfly
valve] [electronic differential pressure transmitter] [_____].
2.6.8
Equipment Control Panel
A control panel with a NEMA [4X] [12] [_____] enclosure shall be supplied
to contain all necessary timers, lights, contact switches, internal wiring,
etc. and associated equipment to allow for the completely automatic
operation of the system. The control panel shall provide for
[automatically starting and stopping pumps] [manual operation of the
control valves] [[manual] [automatic] [_____] backwash initiation] [_____].
Backwash initiation shall be triggered by [elapsed time] [high head loss]
[high turbidity] [manual initiation] [_____]. The panel shall be
completely assembled, wired, and tested at the factory prior to shipment.
The panel shall be provided with required switches for manual operation
should it be required.
2.6.9
Backwash Tank
**************************************************************************
NOTE: The designer should consider the size of the
facility in determining whether a separate
specification section for the backwash tank is
warranted or if the following paragraph is adequate.
**************************************************************************
The backwash tank shall have a capacity of [_____] to backwash the system
at the manufacturer's recommended rate, pressure and frequency. The tank
shall be constructed in accordance with the requirements of Paragraph Tank
Requirements.
2.7
CARTRIDGE FILTER
2.7.1
Equipment Capacity
The Contractor shall supply [_____] filtration units. [_____] units shall
be on-line, [_____] shall be standby. Each on-line and standby unit shall
have the capacity to treat the entire waste stream as specified in
Paragraph Cartridge and Bag Design Criteria.
2.7.2
Filter Material
The filter material shall be of [acetate] [acrylic] [glass] [nylon]
[polyester] [polypropylene] [rayon] [saran] [cotton] [fluorocarbon]
[teflon] [polyethylene] [_____] construction.
2.7.3
Cartridge Style
The cartridge style shall be of [double open end industrial] [single open
ended (SOE) flat closed end to fit housings with 020 O-ring posts] [SOE
SECTION 11393
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