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Rec. Spec. 106DA
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RECOMMENDED SPECIFICATIONS FOR PARKER TRAY
OR SPRAY TYPE PACKAGED FEEDWATER DEAERATORS
A. Furnish one (1) Parker Model __________ ❏Tray or ❏Spray Type Packaged Deaerating
System rated for __________ lb/hr. The system shall be a single tank design with integral
storage and shall guarantee oxygen concentrations not to exceed .005 cc/liter throughout all
load conditions from 5 percent to 100 percent of rated capacity. CO
levels shall be virtually
2
zero.
The deaerator shall have __________ minutes storage capacity, & __________ gallons
storage capacity, and shall be __________" diameter by __________" overall length. The
tank shall be ASME Code Construction to Section VIII and, U Stamped. The vessel shall be
registered with the National Board for 50 PSIG. Unit shall be factory assembled, wired and
broken down for shipping, if required.
The tank stand shall be constructed of square tubing with the vessel section bolting to the
pump stand.
The deaerator shall consist of a stainless steel ❏ tray or ❏ spray assembly, and a tank
scrubber section. All necessary piping to field points of connection shall be provided and
wiring to pumps and controls shall be included.
B. The total inlet flow to the deaerator will be made up of the following:
________% make-up water @ ____ ºF and ____ PSIG (standard is 50ºF @ min 45 PSI)
________% low temperature returns @ __________ºF
________% medium temperature returns @ __________ºF
________% high temperature returns @ __________ºF
The deaerator shall serve __________ (# of) boilers of __________ HP. Operating pressure
of boilers shall be __________ PSIG.
C. Furnish _______ (#) Grundfos boiler feed pumps Model # __________ each having a
capacity of __________ GPM of 225 Deg. F water at a T.D.H. of __________ ft. Pumps
shall be suitably constructed for operation with water at 250 deg. F. Seals shall be of the
mechanical type, suitable for the intended use. Each pump shall be coupled to it's respected
__________ HP 208/230 460v/60hz/3ph, ODP, 3500 RPM NEMA rated motor. A
recirculation orifice shall be provided for each pump, if required.
Boiler Feed Pumps Operation to be ❏ on, off or ❏ continuous. The boilers are fitted with ❏
No feedwater regulating valve, ❏ Modulating feedwater regulating valve or ❏ on/off solenoid
feedwater regulating valve.
The entire assembly shall be factory preassembled and consist of the following accessories:
1. NEMA 4 Electronic level controller with adjustable level setting and proportional
band with LCD display of level & set point.
2. Electronic high and low level lights & low water shutoff of pumps.
3.
Water level gauge glass and cocks.
4. Electronic modulating makeup water control valve with stainless steel trim and
dead-end shut off capability. Valve shall have a capacity of __________ gpm at
__________ psig inlet water pressure.
W:\Bulletin\Recommended Specifications\106DA.doc
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Rec. Spec. 106DA
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RECOMMENDED SPECIFICATIONS FOR PARKER TRAY
OR SPRAY TYPE PACKAGED FEEDWATER DEAERATORS
5. Makeup valve mounted in a three-valve bypass assembly complete with bronze
inlet y-strainer.
6. NEMA 4 Electronic modulating steam pressure controller with LCD Display of
temperature & set point.
7. Electronic Modulating Steam Control Valve with stainless steel trim and dead-end
shut off capability. Mounted assembly consists of (2) shut off valves, check valve,
strainer & pressure gauge. Inlet steam pressure to control valve _______ PSIG.
8. Overflow drainer sized to relieve full capacity of deaerator.
9. Relief valve - Sentinal 50 PSIG.
10. Vent valve.
11. Pressure gauge with siphon pipe and cock.
12. Thermometer.
13. All necessary connections.
14. Pump(s) shall be mounted on a heavy-duty base. Interconnecting piping between
the deaerator storage vessel and the pump suction shall be furnished and include
suction shut-off valve and strainer. Pipe sized for minimum pressure loss.
15. Furnish one complete factory wired and tested control panel and mount on
deaerator. The enclosure shall be NEMA 12 complete with necessary motor
starters with fused protection, disconnect control circuit transformer with fused
primary and secondary circuits, terminal block, selector switches, motor running
lights, and low and high water lights. All switches and lights shall be oil tight
construction and lights shall be of the transformer type. Panel shall be
constructed in accordance with the National Electric Code & be UL or ETL Listed.
16.
Services of a factory representative shall be made available to check installation
and instruct all plant personnel in recommended operation and maintenance
procedures. All the above shall be supplied by a single manufacturer for
undivided system responsibility.
OPTIONS:
1. Manhole (standard on tanks 42" Diameter & larger)
2. Pump standby capability with automatic start of secondary pump after pressure is not
generated in feed water line after a time delay period.
3. Low water alarm
4. Low water dry contacts.
5. High water alarm
6. High water dry contacts.
7. TEFC pump motors.
8. Stainless steel dome for tray type deaerator.
9. Sample cooler mounted ❏ Copper or ❏ Stainless steel.
10. Chemical injection quill & valve ❏ sulfide (in tank), ❏ phosphate in pump suction line.
11. Flexible expansion coupling on pump inlet.
12. Pump discharge check valves.
13.
Parallel pump piping with pump discharge check valves, & (2) shut off valves.
14.
Factory insulated with Aluminum Metal Jacket.
W:\Bulletin\Recommended Specifications\106DA.doc
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