Ball Valves Flashcards
1
Q
Explain the way a Portsmouth ball valve is designed.
A
Movement is in a horizontal direction so that the action is smooth.
2
Q
List 3 advantages of the garston.
A
- Superior ease of operation.
- Cost effective.
- Does not require any lubricant.
3
Q
How does the equilibrium ball valve shut off the water?
A
Utilises the water pressure to help them to close.
4
Q
Where are equilibrium ball valves used - list 3 places?
A
Ask mike.
5
Q
State Archimedes principle of floatations.
A
Ask mike.
6
Q
List 3 defects that occur with ball valves.
A
- Water hammer.
- Furring.
- Faulty floats.
- Jammed piston.
7
Q
How was the problem of furring over come in ball valves?
A
Ask mike.
8
Q
Define a ball valve.
A
A ball valve is control activated by a leaver and it floats to close the water.
