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