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Flashcards in Low Pressure Steam Systems Deck (10)
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0

What is the definition of a counterflow main LP steam system?

Condensate returns to the boiler against the steam flow in the horizontal main

1

What would best describe the system in fig 27?

One pipe Gravity system

2

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

3

What is the name of the system in which a self-induced vacuum can occur?

Vapour

4

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

5

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

6

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

7

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

8

How should eccentric reducers be installed in lines used for condensable vapours

Flat on the bottom

9

What size should a drip leg be on a 6" pipe main?

4"minimum