d.
Grade A - Guaranteed removal from water of all dissolved oxygen in
excess of 0.005 cubic centimeters (cc) per liter 0.0012 cubic
inches per gallon, over a ten to one load swing.
2.14.2.1
Heater Capacity
Provide deaerating heater capable of heating and deaerating makeup water
consisting of [_____] kg per second pounds per hour of softened makeup
water from [_____ to _____] degrees C F (outlet temperature).
2.14.2.2
Inlet Water Characteristics
Softened makeup water:
a.
Ph: [_____]
b.
Total hardness (as CaC03): [_____]
2.14.2.3
Storage Tank
Horizontal design with steel supports [drilled for bolting] of approved
design.
Provide storage tank with not less than a 410 by 510 mm 16 by 20
inch minimum size manhole and cover and provide heater section with not
less than a 300 by 460 mm 12 by 18 inch minimum size tray access handhole
and door.
2.14.2.4
Vent Condensing Arrangement
Provide deaerating heater with a vent condenser which shall condense vented
steam when heater is operating at full capacity with inlet water mixture at
a temperature not exceeding 82 degrees C 180 degrees F. Construct vent
condenser, when of the direct contact type, with stainless steel baffling.
2.14.2.5
Materials
Construct trays, tray supports, water distributors, and all other parts
coming in contact with undeaerated water or air laden steam of 430
stainless steel.
2.14.2.6
Accessories
Provide the 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 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 tray section and 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.
SECTION 15501N
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