provided with at least four tie-down latches[with locking hasps] [with
tamper-proof fasteners]. The access door shall be designed such that, when
removed, no sharp projections remain [and access to the bag-out port is not
impeded]. [When the access door is closed, it shall not press against the
bag-out port or the PVC bag.]
2.3.2
Filtration Element Sealing Mechanism
[Filtration elements provided with gasket seals shall have a sealing
mechanism that is a replaceable unit, constructed of series 300 stainless
steel, providing a total clamping force of 6200 N 1400 lbs per filtration
element in accordance with DOE HDBK-XXXX.] [Filtration elements provided
with fluid seals shall have a series 300 stainless steel replaceable
sealing mechanism that engages and disengages the element on the housing
mounting frame's knife edge.]
2.3.3
Casings and Insulation
Casings shall be field insulated as specified in Section 15895 AIR SUPPLY,
DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS, paragraph: Casings. For
double wall type casing sections all of the required insulation shall be
placed inside the cavity area.
2.3.4
Housing Man-Entry Doors
Access Doors shall be [single wall] [50 mm 2 inch] [100 mm 4 inch thick
double wall type injected with a minimum of 0.028 kg/cubic meter 2.2
pounds/cubic foot of polyurethane foam]. Each door shall have a [stainless
steel] [hot dipped galvanized steel] finish of the same material as the
housing front and back. [Interior and exterior panels must bond to create
a seamless rigid panel with a minimum insulating value of] [R-13] [_____].
Door panels must [use a high density polyurethane thermal break
and]incorporate an extruded gasket and must be impervious to virtually all
chemicals and be highly flexible in extreme heat or cold. Doors will
include heavy duty stainless steel hinges and a minimum 1250 x 1250 mm 8 x
8 inch [single] [double] pane safety glass view windows with integral wire
mesh reinforcing. Independent lab test must confirm zero total CFM air
leakage at 1250 pascal 5.0 inches wg static pressure for a 600 x 1500 mm 24
x 60 inch [out] [in] swing door with two hinges and two latch points
operable from inside and outside the housing. Test method shall be ASTM E
283.
2.4
FILTRATION ELEMENTS
Air filtration elements shall be listed in accordance with UL 900, except
that high-efficiency particulate air filters and carbon adsorbers shall
meet the requirements indicated.
2.4.1
Roughing Filter
The roughing filter shall be [50] [100] mm [2] [4] inch deep, rigid pleat
panel filter, consisting of cotton and synthetic media, heavy gauge
expanded metal support grid, and rigid board enclosing frame. The roughing
filter shall be UL 586 Class II. The roughing filter shall have an
average atmospheric dust-spot efficiency of 25 to 30 percent based on
ASHRAE 52.1. Initial resistance at [_____] m/s feet/second shall not
exceed [_____] pascals inches wg.
SECTION 15860A
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