Low Inlet Boiler Feed Units
 

Bulletin 129B

FEATURES

RECEIVING TANK:

Heavy steel construction, mounted on steel saddles fitted with thermometer and gauge glass.

MAKEUP WATER VALVE:

All-bronze float actuated valve, flange mounted in tank head, permits entry of makeup water, when required, to replace system losses. Complete with strainer on make-up water connection.    

PUMP(S): 

Close-coupled, bronze-fitted, centrifugal design, with leakless mechanical shaft seal.

MOTOR(S):

Drip-proof ball bearing type close-coupled to pump(s). Single phase motors in fractional H.P. frame sizes have built-in thermal overload protection. Single phase motors in integral H.P. frame sizes, and all 3 phase motors, are furnished with magnetic starters in NEMA 1 general purpose wall­mounting enclosures. Units are available with 1750 R.P.M. or 3450 R.P.M. motors (see Engineering Selection Table).

UNITS:

Unit is factory assembled. Simplex unit has one receiving tank, one makeup valve and one pump and motor. Duplex unit has one receiving tank, one makeup valve, and two pumps and motors. Triplex unit has one receiving tank, one makeup valve and three pumps and motors. Quadruplex unit has one receiving tank, one makeup valve and four pumps and motors.

OPERATION: 

Boiler feed pump(s) is controlled by a boiler water level controller mounted on the boiler. These controllers are usually furnished with integral low water cut-off and alarm switches. Boiler feed water is taken from the receiver, and if condensate has been lost in the system, it is automatically replaced by the makeup valve

MODIFICATIONS TO STANDARD UNITS

NON-STANDARD TANK SIZES:  Units can be furnished with tank capacities other than shown in the selection table. Diameters and lengths of receivers can be modified where required by space conditions. Return inlet height and location can be modified.

GALVANIZING OF RECEIVER:  Hot-dip galvanized inside and outside.

SPECIAL RECEIVER COATINGS:  Special interior and exterior coatings where job conditions require extra corrosion resistance.

INTERIOR TANK BAFFLES:  Built into tank to prevent air or sludge from entering pump suction.

SPECIAL RECEIVER TAPPINGS:  Special or additional tappings as required.

MANHOLE: Manhole and bolted cover for clean-out and inspection.

DRAIN VALVE:  Tank drain connection can be fitted with bronze drain valve.

EXTERNAL FLOAT CHAMBER MAKEUP VALVE:  Mounted on end of receiver with 3-valve by-pass piping to permit manual and automatic makeup water control. Has built-in strainer.

SOLENOID OPERATED MAKEUP VALVE:  Furnished with reverse-acting float switch in receiver to actuate the solenoid valve. Requires electric service for operation and is furnished with makeup water strainer. Can be furnished with or without air gap.

CORROSION INHIBITOR BAR:  Magnesium anode bar in the receiver to inhibit electrolytic corrosion; with drip-hole to indicate when bar has been completely corroded and requires replacement.

FEED WATER HEATERS:  Perforated brass steam injection pipe operated by temperature regulating valve with sensor.

SPECIAL THERMOMETER:  Standard column type can be replaced by special thermometers as specified.

PRESSURE GAUGES:  Pump discharge pressure gauge available.

NON-STANDARD MOTOR ENCLOSURES:  Standard enclosures are drip-proof. Totally enclosed and explosion-proof enclosures are available.

TRANSFER SWITCHES:  To alternate pump operation or transfer pump-boiler relationship in multiple-boiler installations.

CONTROL PANELS:  Control components can be mounted on factory-wired wall­mounting or floor-mounting panel, in lieu of individual wall-mounting enclosures.

NON-STANDARD MOTOR CONTROLS:  "Hand-off-Automatic" selector switch, pilot light and control circuit transformer for motor starters; waterproof or explosion-proof enclosures for starters; combination magnetic starters and disconnect switches, plus combination magnetic starters and circuit breakers.

LARGER UNITS:  For ratings in excess of 1000 Boiler H.P. and discharge pressures up to 125 psi, consult ABC Electric Corp.

STRAINER:  Fitted to the return inlet connection of receiver.

CONDENSATION RETURN UNITS:  BFV Units can be furnished as condensation return units by substituting a float switch in the receiver to operate each pump and removing the make-up water valve.

SHUT-OFF VALVE FOR PUMP SUCTION:  Units can be furnished with butterfly shut-off valve for each pump suction connection. .

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Suggested Specifications for Architects and Engineers

Furnish and install where indicated on plans, a Type BFV Simplex (or Duplex; Triplex; Quadruplex) Boiler Feed Unit, as manufactured by Federal Pump Corp., Unit No. BFV-_____ sized to provide feed water to _____boiler(s), (each) developing _____boiler H.P. (Each) pump shall deliver _____G.P.M. at a discharge pressure of _____PSIG at the pump(s).

Unit shall be factory assembled by the pump manufacturer, including all required accessories. Pump(s) shall be close-coupled, end-suction, bronze-fitted, centrifugal type, flanged to suction chamber which shall be welded onto the receiver shell. Pump(s) shall have mechanical shaft seal and bronze shaft sleeve and shall be driven by _____H. P., _____phase, _____cycles, _____volts, _____R.P.M. ball bearing, drip-proof (or totally enclosed; explosion-proof) motor(s). Single phase motors in fractional H.P. frame sizes shall have built-in thermal overload protection. Single phase motors in integral H.P. frame sizes and all three phase motors shall be provided with across-the-line type magnetic starters in NEMA-1 general purpose (or NEMA-4 Water-tight; NEMA-7 Explosion-proof) wall-mounting enclosure(s).

Receiver shall have a capacity of _____gallons, heavy steel construction, with gauge glass, thermometer, and connections for low level return inlet, vent and drain. Makeup water valve, flange-mounted on tank head, shall be of all-bronze construction, float operated with makeup water strainer.

Furnish and install on (each) boiler a water level controller to automatically operate the pump(s), with low-water cut-off and alarm switch, plus alarm bell. Controller shall be equal to McDonnell-Miller No. 150 (for boiler pressures up to 150 P.S.I.) or No. 94 (for boiler pressures up to 250 P.S.I.). (Boiler water level controller are not usually furnished by Federal).