Chapter 94- Basic Fittings For Hot Water Boilers Flashcards
The following fittings are required on every hot water boiler
Pressure or altitude gauge Thermometer Safety relief valve Temps true relief device Stop valve Blow off or drain connection Expansion tank
In order to indicate the working pressure in hot water boilers, each hot water boiler shall be equipped with a
Pressure or altitude gauge
In what manner must a pressure or altitude gauge be connected to a hot water boiler
In such a manner that it cannot be shut off, except by a cock with a tee or lever handle
The scale on a gauge must be graduated to what specifications
Not less than 1 1/2 or more than 3 times the maximum allowable working pressure
How many pointers does an altitude gauge have?
2
One for water height one for pressure
What does it mean if the water pressure reading is lower than the water height reading?
The boiler is no longer full of water
A safety relief valve is used for
Steam pressure
A pressure relief valve is used for
Liquid
What may be installed between a pressure relief valve and the boiler?
Absolutely fucking nothing
The discharge piping from a safety relief valve must be connected how
It can’t be connected directly there must be an air break
What’s an expansion tank
To provide storage space for excess water due to thermal expansion
A pressure or altitude gauge for a hot water boiler does not require a
Siphon
In a hot water boiler heating system when the system is cold
The auto fill valve will maintain a system minimum pressure
The temperature indicator of a hot water boiler should indicate water temperature
At the boiler outlet
Hot water heating boilers must be equipped with a
Thermometer
A boiler pressure relief valve
Are usually installed on the boiler
For hot water bless operating up to 414 Kpa, a pressure relief valve opening pressure variation may be as much as
20 Kpa
A hot water boiler is protected from over pressure by means of
A safety relief valve
Hot water boilers have stop valves in there inlet and outlet piping
S that the oiler may be drained without draining the system
Boiler stop valves shall be
Identifiable with durable tags
During warmup of a cold water boiler excessive pressure buildup is prevented with
An expansion tank
The air released from the water in the closed expansion tank type hot water heating system is directed to
The expansion tank
In a closed expansion tank system, an air separator
Directs air into the expansion tank
In a hot water heating system the closed type expansion tank should be
Partly filled with water
