A firebox boiler is a cylindrical scotch marine boiler.

Suction lift is the pressure at a pump inlet when the liquid supply to the pump is taken from a tank or other supply source that is above the pump.

In the combustion process, approximately 75 lb of air are required for every pound of fuel burned.

A feedwater ___ valve is located next to a feedwater stop valve and prevents feedwater from flowing from the boiler back to the feedwater pump.

A reciprocating compressor is a compressor that has reciprocating cylinders to compress refrigerant.

An aquastat controls the burner by sensing steam pressure in a hot water boiler.

Stop valves before and after a pressure-reducing valve allow servicing of the pressure-reducing valve.

The location of an auxiliary low water fuel cutoff allows it to act as a backup if the primary low water fuel cutoff fails to shut the burner OFF in a low water condition.

A steam strainer should be located in a steam line after a steam trap.

An aquastat controls the burner by sensing steam pressure in a hot water boiler.