Chapter 10- Hot Water Boiler Accesories Flashcards
What is a Centrifugal Pump
A dynamic pump with a rotating impeller inside a cast iron or steel housing
Expansion Tank and Compression tank?
Older Natural Circulation system uses expansion tanks and modern forced circulation uses compression tank
They flip it
What is an Expansion Tank?
Is used to relieve pressure in a natural circulation hot water heating system
What is a Compression Tank?
Is used to absorb changes in water pressure in a forced circulation hot water heating system
What is Point Of No Pressure Change?
The point where a compression tank connects to a piping system
What is Make Up water?
Water added to boiler to make up for the water loss due to leaks or lost condensate
What is a Pressure Reducing Valve?
It reduces incoming makeup water pressure to the system operating pressure
What is a Backflow Preventer?
A boiler accessory that prevents the flow of water back to the potable water supply
What is a water strainer?
It removes solid particles from the water inside a piping system
What is a check valve?
A valve that permits fluid flow in only one direction
What is a swing check valve?
Prevents backflow thorough the use of a hinged disc within the valve body
What is a lift check valve?
Prevents backflow through the use of a disc that moves vertically within the valve body
What is a Diverter Fitting?
A hot water boiler accessory resembling a piping tee that meters water flow from a supply line to a heating unit
What is a three way valve?
A three way diverting valve is a valve with three opening used in a diverter applications suitable for fluid transfer or as a control or mixing valve
What is a Flow control valve?
Opens and closes automatically to prevent natural circulation in a hot water heating system when the circulating pump is not operating
