Boiler feed pump

Heating · Components and Problems · printed page 198 (PDF page 199)

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Book index entries

Steam Heat – Systems

Text in the illustration

receiver
air vent (do not block)
from returns
feed pump is controlled by the pump and low water control on the boiler
receiver is much larger than the receiver in a condensate pump
motor
to boiler inlet
check valve
feed pump
water
pressure reducing valve
water supply
12 PSI
solenoid valve
float
float switch
auto water feeder
the auto water feed system adds water to the receiver (from the house supply plumbing) as necessary to keep the receiver 1/4 filled
it may be controlled by a float switch/solenoid valve or a simpler ballcock valve
cross section

Generated explanation

The cross section shows a steam-heating boiler feed pump with a vented receiver collecting water from the system returns. A motor-driven pump draws water from the bottom of the receiver and sends it through a check valve to the boiler inlet, under control of the boiler's pump and low-water control. An automatic water feeder supplies makeup water through a pressure-reducing valve marked 12 PSI and a solenoid valve operated by a receiver float switch. The annotations specify keeping the receiver one-quarter filled, leaving the air vent unobstructed, and using a receiver much larger than that of a condensate pump. A ballcock valve is noted as an alternative makeup-water control.

Components

boiler feed pump pump motor receiver tank air vent return piping check valve boiler inlet piping automatic water feeder pressure-reducing valve solenoid valve float float switch water supply piping

Related illustrations

1113

Boiler feed pump

· p. 194

A cross section shows a steam-heating boiler feed pump drawing water from a receiver and discharging it through a check valve to the boiler inlet. Condensate enters from the returns near the top of the receiver, which ha

1112

Location of boiler feed pump

· p. 194

A building cross section shows a steam boiler and boiler feed pump below a radiator. Red arrows trace steam from the boiler header through the supply main and up the radiator supply pipe, while blue arrows indicate retur