Low Pressure Steam Systems Flashcards
What would best describe the system in fig 27?
One pipe Gravity system
What is the definition of a counterflow main LP steam system?
Condensate returns to the boiler against the steam flow in the horizontal main
How is a two pipe Gravity return system balanced so the steam will fill each radiator at approx same time
By proper sizing of the orifice in the air vent
What is the name of the system in which a self-induced vacuum can occur?
Vapour
What will occur if the automatic water feeder cannot keep up with the rate of steam evaporation from the boiler
The low water cut-off will shut off the fuel source
What could result of a high water level reduces the available steam space at the top of the boiler
Priming and carryover with possible water hammer
Why are residential one-pipe Gravity return system designs for a maximum of a 1/2” pressure drop a cross the system
To maintain low steam velocities in the system
If the volume of steam flow per hr is known, what else do you need to know to calculate the probable velocity in a pipe?
Cross sectional area of the pipe
How should eccentric reducers be installed in lines used for condensable vapours
Flat on the bottom
What size should a drip leg be on a 6” pipe main?
4”minimum
