Boilers Flashcards
What can be used if a 20 degree differential is not possible
Belly pump internally circulating
How much temperature change can a condensing boiler have
40 degrees
Can be as low as 80 degrees
What is the purpose of a water meter
Helps calculate chemical treatment
Would show system leak
What is the purpose of a corrosion/oxygen inhibitor
Protects the system
What is a buffer tank for
Stores energy
Reduces number of cycles
Temp set a few degrees less than boiler
What systems can you use for steam boilers
Water and fire tube
Usually use water tube
Fire tubes are for smaller applications
What pressure in a steam boiler is considered low in fire tube
less than 15 PSI
What pressure in steam boilers are consider high in fire tube
15 PSI and up
What pressures for steam are considered
Low
Med
High
Very high
Low-150 to 250
Med 300 - 550
High 600 to 950
very high over 1000
Purpose of steam traps
Filters out condensate from steam without letting steam escape
How much energy can condensate have
10 percent
What is a condensate feeder tank
Pumps condensate back into system
For every KG of steam how much water must be pumped back in
1 to 1 ratio
How much can scale decrease efficency
10 percent
Purpose if blow down tubes
remove scale and sludge from system
