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Questions and Answers
EASY What is the purpose of a vacuum breaker in a low-pressure steam heating boiler?
Which of the following is not a required fitting by ASME BPVC IV for a low-pressure steam heating boiler?
Why is a gauge glass not required on a hot water boiler?
What is the benefit of installing a feedwater regulator in a low-pressure steam heating boiler?
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What is the purpose of an air separator in a hot water heating boiler?
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Why is a stop valve in the return pipe connection required if a stop valve is installed in the steam outlet of a low-pressure steam heating boiler?
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What is the purpose of a drum vent valve in a low-pressure steam heating boiler?
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When does a low-pressure steam heating boiler typically remain off for several hours or days?
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MEDIUM What is the primary reason for installing a feedwater regulator in a low-pressure steam heating boiler?
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What is the purpose of the air inlet connection on a vacuum breaker?
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What is the primary function of a circulating pump in a hot water heating boiler?
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Why is a gauge glass not typically fitted on a hot water boiler?
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What is the consequence of not having a vacuum breaker in a low-pressure steam heating boiler?
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What is the purpose of a drum vent valve in a low-pressure steam heating boiler?
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What is the primary benefit of installing a stop valve in the steam outlet of a low-pressure steam heating boiler?
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What is the condition that can occur in a low-pressure steam heating boiler during the off cycle?
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What is the primary function of a feedwater regulator in a low-pressure steam heating boiler?
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Why is an air separator installed in a hot water heating boiler?
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What is the primary reason for installing a stop valve in the steam outlet of a low-pressure steam heating boiler?
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What is the purpose of the stainless steel check ball in a vacuum breaker?
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Why is a circulating pump installed in a hot water heating boiler?
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What is the primary benefit of maintaining a consistent water level in a low-pressure steam heating boiler?
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Why is a gauge glass not typically fitted on a hot water boiler?
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What is the primary consequence of not having a vacuum breaker in a low-pressure steam heating boiler?
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Match the following components with their functions in a hot water heating boiler:
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Match the following components with their functions in a low-pressure steam heating boiler:
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Match the following components with their benefits in a low-pressure steam heating boiler:
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Match the following components with their locations in a hot water heating boiler:
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Match the following components with their purposes in a low-pressure steam heating boiler:
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Match the following components with their benefits in a hot water heating boiler:
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Match the following components with their consequences of not having them in a low-pressure steam heating boiler:
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Match the following components with their installation requirements in a low-pressure steam heating boiler:
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Study Notes
Hot Water Heating Boiler Fittings
- A hot water heating boiler is equipped with all code required fittings, as shown in Figure 9.
- Desirable but not required fittings include an air separator in the supply line, a circulating pump, and an automatic fill valve.
- A gauge glass is not required on a hot water boiler, but is usually fitted on the expansion tank.
Low-Pressure Steam Heating Boiler Fittings
- A low-pressure steam heating boiler is equipped with many fittings required by ASME BPVC IV, as shown in Figure 10.
- Feedwater regulators are not required by ASME BPVC IV, but can reduce fuel consumption, thermal shock, carryover, and low water conditions by maintaining a consistent water level.
- A stop valve is not required in the steam outlet for single steam heating boiler systems, but if installed, a stop valve must also be installed in the return pipe connection.
Low-Pressure Steam Heating Boiler Operation
- Low-pressure steam heating boilers controlled by an outside air temperature sensor may remain off for several hours or days during spring or fall months.
- During the off cycle, the boiler cools, forming an internal vacuum that draws water into the boiler from the feedwater system, causing flooding.
- Vacuum breakers are installed to prevent this, automatically drawing air into the boiler when it cools and pressure drops below atmospheric.
Vacuum Breaker
- A vacuum breaker is a small fitting containing a stainless steel check ball.
- It has connections for a steam inlet and an air inlet.
- When the boiler operates, steam pressure holds the ball on its seat, and when the boiler cools, air is automatically drawn into the boiler to prevent a vacuum.
Drum Vent Valve
- Although not required by ASME BPVC I, most boilers are equipped with a drum vent valve.
- The vent valve is used for:
- Allowing air to escape from the boiler when it is being filled with water.
- Allowing air into the boiler when it is being drained or cooled, preventing vacuum formation.
- Releasing air and non-condensable dissolved gases from the boiler during warm-up, preventing return line corrosion and air binding.
Hot Water Heating Boiler Fittings
- A hot water heating boiler is equipped with all code required fittings, as shown in Figure 9.
- Desirable but not required fittings include an air separator in the supply line, a circulating pump, and an automatic fill valve.
- A gauge glass is not required on a hot water boiler, but is usually fitted on the expansion tank.
Low-Pressure Steam Heating Boiler Fittings
- A low-pressure steam heating boiler is equipped with many fittings required by ASME BPVC IV, as shown in Figure 10.
- Feedwater regulators are not required by ASME BPVC IV, but can reduce fuel consumption, thermal shock, carryover, and low water conditions by maintaining a consistent water level.
- A stop valve is not required in the steam outlet for single steam heating boiler systems, but if installed, a stop valve must also be installed in the return pipe connection.
Low-Pressure Steam Heating Boiler Operation
- Low-pressure steam heating boilers controlled by an outside air temperature sensor may remain off for several hours or days during spring or fall months.
- During the off cycle, the boiler cools, forming an internal vacuum that draws water into the boiler from the feedwater system, causing flooding.
- Vacuum breakers are installed to prevent this, automatically drawing air into the boiler when it cools and pressure drops below atmospheric.
Vacuum Breaker
- A vacuum breaker is a small fitting containing a stainless steel check ball.
- It has connections for a steam inlet and an air inlet.
- When the boiler operates, steam pressure holds the ball on its seat, and when the boiler cools, air is automatically drawn into the boiler to prevent a vacuum.
Drum Vent Valve
- Although not required by ASME BPVC I, most boilers are equipped with a drum vent valve.
- The vent valve is used for:
- Allowing air to escape from the boiler when it is being filled with water.
- Allowing air into the boiler when it is being drained or cooled, preventing vacuum formation.
- Releasing air and non-condensable dissolved gases from the boiler during warm-up, preventing return line corrosion and air binding.
Hot Water Heating Boiler Fittings
- A hot water heating boiler is equipped with all code required fittings, as shown in Figure 9.
- Desirable but not required fittings include an air separator in the supply line, a circulating pump, and an automatic fill valve.
- A gauge glass is not required on a hot water boiler, but is usually fitted on the expansion tank.
Low-Pressure Steam Heating Boiler Fittings
- A low-pressure steam heating boiler is equipped with many fittings required by ASME BPVC IV, as shown in Figure 10.
- Feedwater regulators are not required by ASME BPVC IV, but can reduce fuel consumption, thermal shock, carryover, and low water conditions by maintaining a consistent water level.
- A stop valve is not required in the steam outlet for single steam heating boiler systems, but if installed, a stop valve must also be installed in the return pipe connection.
Low-Pressure Steam Heating Boiler Operation
- Low-pressure steam heating boilers controlled by an outside air temperature sensor may remain off for several hours or days during spring or fall months.
- During the off cycle, the boiler cools, forming an internal vacuum that draws water into the boiler from the feedwater system, causing flooding.
- Vacuum breakers are installed to prevent this, automatically drawing air into the boiler when it cools and pressure drops below atmospheric.
Vacuum Breaker
- A vacuum breaker is a small fitting containing a stainless steel check ball.
- It has connections for a steam inlet and an air inlet.
- When the boiler operates, steam pressure holds the ball on its seat, and when the boiler cools, air is automatically drawn into the boiler to prevent a vacuum.
Drum Vent Valve
- Although not required by ASME BPVC I, most boilers are equipped with a drum vent valve.
- The vent valve is used for:
- Allowing air to escape from the boiler when it is being filled with water.
- Allowing air into the boiler when it is being drained or cooled, preventing vacuum formation.
- Releasing air and non-condensable dissolved gases from the boiler during warm-up, preventing return line corrosion and air binding.
Hot Water Heating Boiler Fittings
- A hot water heating boiler is equipped with all code required fittings, as shown in Figure 9.
- Desirable but not required fittings include an air separator in the supply line, a circulating pump, and an automatic fill valve.
- A gauge glass is not required on a hot water boiler, but is usually fitted on the expansion tank.
Low-Pressure Steam Heating Boiler Fittings
- A low-pressure steam heating boiler is equipped with many fittings required by ASME BPVC IV, as shown in Figure 10.
- Feedwater regulators are not required by ASME BPVC IV, but can reduce fuel consumption, thermal shock, carryover, and low water conditions by maintaining a consistent water level.
- A stop valve is not required in the steam outlet for single steam heating boiler systems, but if installed, a stop valve must also be installed in the return pipe connection.
Low-Pressure Steam Heating Boiler Operation
- Low-pressure steam heating boilers controlled by an outside air temperature sensor may remain off for several hours or days during spring or fall months.
- During the off cycle, the boiler cools, forming an internal vacuum that draws water into the boiler from the feedwater system, causing flooding.
- Vacuum breakers are installed to prevent this, automatically drawing air into the boiler when it cools and pressure drops below atmospheric.
Vacuum Breaker
- A vacuum breaker is a small fitting containing a stainless steel check ball.
- It has connections for a steam inlet and an air inlet.
- When the boiler operates, steam pressure holds the ball on its seat, and when the boiler cools, air is automatically drawn into the boiler to prevent a vacuum.
Drum Vent Valve
- Although not required by ASME BPVC I, most boilers are equipped with a drum vent valve.
- The vent valve is used for:
- Allowing air to escape from the boiler when it is being filled with water.
- Allowing air into the boiler when it is being drained or cooled, preventing vacuum formation.
- Releasing air and non-condensable dissolved gases from the boiler during warm-up, preventing return line corrosion and air binding.
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Description
This quiz covers the required and desirable fittings for hot water and low-pressure steam heating boilers, including gauge glasses and automatic fill valves.
