Block 1 - Oil Controls & Components Flashcards
What are the three general zones of an oil supply system?
- Oil supply
- Fuel train
- Atomizing air
What components are included in the oil supply section?
- Shutoff valve
- Vacuum gauge
- Check valve
- Priming tee
- Strainers
- Supply pump
- Supply pressure gauge
- Oil relief valve (bypass valve)
- Return back pressure orifice
What components are typically found in a main oil valve train for light oil?
- Two solenoid safety shutoff valves (SSOVs)
- Oil pressure regulator
- Oil metering valve
- Mixing manifold block for mixing atomizing air and oil
What is the function of the atomizing air section?
- Supplies atomizing air to the oil supplied to the burner
What components make up the atomizing air section?
- Air pump
- Air strainer & check valve
- Lube oil strainer
- Air/oil receiver tank
- Air proving switch
What does the Oil Drawer Switch do?
Opens the limit circuit if the oil drawer burner gun is not latched in the forward position required for burning oil
What is the purpose of the Atomizing Air Proving Switch?
Pressure-actuated switch whose contacts are closed when sufficient atomizing air pressure is present for oil firing
What is the function of the Oil Solenoid Valve?
Opens when energized to allow fuel oil flow from the oil metering valve to the burner nozzle
What are the integral parts of a Fuel Oil Controller?
- Oil metering valve
- Oil modulating cam
- Oil burner pressure gauge
- Oil pressure regulator
What does the Oil Relief Valve (Bypass) do?
Maintains a constant oil supply pressure to the fuel oil controller by bypassing excess fuel oil
What is the function of the Back Pressure Orifice?
Creates back pressure to maintain a constant supply pressure to the fuel metering valve
What is the role of the Air Pump Module Assembly?
Provides the compressed air required to atomize the fuel oil for proper combustion
What does the Low Oil Pressure Switch do?
Opens when fuel oil pressure drops below selected pressure and interrupts the limit circuit
What is the purpose of the Fuel Oil Pump?
Transfers fuel oil from the storage tank and delivers it under pressure to the burner system
What are the requirements set by ASME CSD-1 regarding filters or strainers?
Filters and strainers shall be installed upstream from the safety shutoff valve(s)
What is the function of a pilot gas train in larger oil-fired burners?
Necessary for safe lighting of the burner, controlling fuel flow to the pilot nozzle
What does an oil heater do for heavy oil?
Heats heavy oil to reduce viscosity for effective atomization and combustion
What is the role of pressure and temperature switches in oil systems?
- Supervises oil supply pressure
- Monitors atomizing media pressure
- Provides safety shutdowns for high oil temperature
Fill in the blank: The two main methods of oil atomization for oil-fired burners are _______ and _______.
[Pressure atomization], [Air atomization]
What is the key factor in the pressure atomization process?
The pressure at the oil nozzle
What is the typical oil pressure range for pressure atomization?
100-300 psi
What is the turndown ratio for an air atomized burner?
6:1 to 8:1
What is the required steam pressure for steam-atomizing burners?
75 to 150 psi
What supervises low oil pressure for systems greater than 20 gph?
Low oil pressure interlock switch
Which part of the oil system supplies oil from the storage tank to the burner?
Oil supply
What is the typical turndown ratio for an air atomized burner?
6:1 to 8:1
Which part starts and stops with the forced draft fan motor in the CB-LE model?
Air pump motor
What is the main function of the oil heater for heavy oil?
Reduce viscosity for effective atomization
What is included in the fuel oil controller?
Oil metering valve, regulator, and gauge
What component prevents backflow in the oil supply system?
Check valve
What ensures proper combustion by atomizing fuel oil?
Oil injection nozzle
Which component mixes atomizing air and oil?
Mixing manifold block
What is used to supervise high oil temperature in preheated oil systems?
High oil temperature interlock switch
What controls oil flow to meet load demands?
Oil modulating cam
What does the air filter in the CB-LE model do?
Cleans air supply entering the pump
Which component holds a supply of lubricating oil for the air pump?
Air/oil receiver tank
What method of atomization is commonly used in small power plants?
Steam atomization
Which atomization method requires fewer piping components?
Pressure atomization
What causes a safety shutdown if atomizing media pressure drops below design pressure?
Low-pressure interlock switch
What is the oil pressure range for pressure atomizing burners?
100-300 psi
What maintains a constant oil supply pressure in the fuel system?
Oil relief valve
What is the role of the fuel oil strainer?
Prevent foreign matter from entering the system
Which component is optional in smaller oil-fired burners?
Low oil pressure switch
What does the oil metering valve do?
Regulates the flow of oil to the burner nozzle
What type of atomization requires an air compressor?
Air atomization
What does the vacuum gauge in the oil supply system measure?
Suction pressure in the supply line
What component prevents surging back through the pump and air filter?
Check valve
What controls the movement of the metering stem?
Modulating motor through linkage and cam
What is the purpose of the atomizing air proving switch?
Ensures sufficient atomizing air pressure is present for oil firing
Which component is used to cool lubricating oil in the atomizing air system?
Lube oil cooling coil
What is the turndown ratio for pressure atomizing burners?
3:1 to 4:1
What ensures proper atomization in steam atomizing burners?
Low oil pressure and high steam pressure
What type of safety shutoff valves (SSOVs) are used in oil systems?
Electro-hydraulic actuators
