2.9.2.3
Inlet Water Characteristics
Softened makeup water:
Ph: [_____]
Total hardness (as CaC03):
[_____]
2.9.2.4
Storage Tank
Horizontal design with steel supports [drilled for bolting] of approved
design. Provide storage tank with not less than a 400 by 500 mm 16 by 20
inch minimum size manhole and cover and provide heater section with not
less than a 300 by 450 mm 12 by 18 inch minimum size tray access handhole
and door.
2.9.2.5
Vent Condensing Arrangement
Provide the deaerating heater with a vent condenser which shall condense
the vented steam when the heater is operating at full capacity with the
inlet water mixture at a temperature not exceeding 82 degrees C 180 degrees
F. Construct the vent condenser, when of the direct contact type, with
stainless steel baffling.
2.9.2.6
Materials
Construct trays, tray supports, water distributors, and other parts coming
in contact with undeaerated water or air laden steam of 430 stainless steel.
2.9.2.7
Accessories
Provide deaerating heater with the following accessories:
a.
Pressure Relief Valve:
Sized in accordance with FS W-H-2904.
b.
Thermometers: Two, 125 mm 5 inch dial thermometers, 10 to 149
degrees C 50 to 300 degrees F, with lagging extension type wells
for the storage tank and the heater section. Provide a
thermometer similar to above but with range of minus [_____]
degrees C F to plus [_____] degrees C F for the makeup water
connection.
c.
Lifting attachments for the tray section and the storage tank.
d.
Water Gage Glasses:
Reflex type with shutoff valve and guards.
e.
Pressure Gages: One 150 mm 6 inch dial compound pressure gage for
the heater section with range from [_____] kPa inches of mercury
(vacuum) to [_____] kPa (gage) psig.
f.
Float Controllers:
(1)
Inlet condensate controller
(2)
Makeup water controller
(3)
Overflow controller
g.
Overflow Control Valve: With pneumatic controller arranged for
local automatic operation.
SECTION 15511N
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