Pneumatic Fundamentals Flashcards
What is compressed air measured in ?
Kilopascals ( kPa).
What does a Air compressor do ?
Utilises electric motor to drive an air pump that delivers pressurised air to reservoirs
What does a compressor Governors do ?
Monitors Air pressure in reservoirs
Turns compressor’s on/off
What is the role of Safety Valves?
Stops reservoirs from overcharging
What is a role of an Air Dryer?
Removes :
-moisture (water)
- oil from pneumatic system
- Dirt
What does a Reservoir do ?
Stores compressed Air
What train equipment and systems employ pneumatic requirements?
-Whistles
-Friction braking
-Air suspension systems
-Sanding equipment
-Pantograph raising
-Saloon doors opening and closing ( commeng only )
-Spring Park brake system
What is a Isolating cock used for ?
Turn equipment off
Redirect compressed air
What are two types of valves ?
Simple
Complex
What is the use of a Isolating cock?
Used to stop the air flow if necessary
What are the two braking types?
1- ELECTRIC BRAKE ( electro dynamic braking )
2- ELECTRO PNEUMATIC ( E.P)
How does a EP brake work ?
Electron pneumatic brake works by :
-Using compressed Air to apply mechanical force
- Achieved through a BRAKE BLOCK or DISC PAD
What does a Spring park Brake do?
Stops the train from rolling away
2 functions of the Whistle are ?
- warnings
- communication
What is a FWN?
Fault warning notice.
Its a defect that impacts the safe running of the train.
