Inlet/Outlet Connection Type:
[side in/side
out] [side in/bottom out]
Body/Sump Drain:
[_____] [NPT]
[Flange] [_____]
Vent:
[_____] [NPT]
[Flange] [_____]
Gauge:
[_____] [NPT]
[Flange] [_____]
2.8.7.2
Shell O-Ring Material
The filter housing shell O-ring material shall be [buna-n] [silicon]
[neoprene] [viton-a] [ethylene] [propylene] [_____].
2.9
SAMPLE PORTS
Two sample ports, at a minimum, shall be located on each unit; one to
sample the influent and one to sample the effluent. The sample ports shall
be readily accessible and shall be of the manufacturer's standard design
and placement.
2.10
TURBIDIMETER
**************************************************************************
NOTE: Delete the interface screening requirement if
turbidity monitoring will not be performed at the
media interface and for bag and cartridge filters.
**************************************************************************
A turbidimeter for automatically testing the turbidity of the water shall
be installed in the [influent line] [effluent line] [media interface] for
each filter unit. The [influent] [effluent] sample shall be obtained
directly from the piping. The interface sample shall be collected from a
screen located within the media bed [_____] mm inch above the media
interface. The turbidimeter shall be housed in a NEMA [4x] [12] [_____]
enclosure and located within [_____] from the sensor. It shall be
programmable to read in NTU, FTU, and engineering units. The measurement
range shall be from [_____] NTU to [_____] NTU.
2.11
DRAIN LINE
A drain line shall be located to facilitate the removal of water from the
filter tank. The drain line shall be readily accessible and shall be of
the manufacturer's standard design and placement.
2.12
CHEMICAL FEED
Chemical feed systems shall be in accordance with the requirements of
Section 11242 CHEMICAL FEED SYSTEMS.
2.13
SPARE PARTS
Standard spare parts shall be provided as recommended in the manufacturer's
instruction manuals for each component of the equipment.
2.14
MATERIALS PROTECTION
The interior and exterior of fabricated ferrous metal components shall be
treated after fabrication to prevent corrosion. The surfaces of the filter
tanks shall be sandblasted and completely factory finish painted prior to
shipment. Insulating components such as gaskets, couplings, or bushing or
dielectric-type which will prevent corrosion of bimetallic-type contacts,
shall be used at connections between dissimilar metals.
SECTION 11393
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