Ball Valves

Question 1

Explain the way a Portsmouth ball valve is designed.

Answer 1

Movement is in a horizontal direction so that the action is smooth.

Question 2

List 3 advantages of the garston.

Answer 2

1. Superior ease of operation.
2. Cost effective.
3. Does not require any lubricant.

Question 3

How does the equilibrium ball valve shut off the water?

Answer 3

Utilises the water pressure to help them to close.

Question 4

Where are equilibrium ball valves used - list 3 places?

Answer 4

Ask mike.

Question 5

State Archimedes principle of floatations.

Answer 5

Ask mike.

Question 6

List 3 defects that occur with ball valves.

Answer 6

1. Water hammer.
2. Furring.
3. Faulty floats.
4. Jammed piston.

Question 7

How was the problem of furring over come in ball valves?

Answer 7

Ask mike.

Question 8

Define a ball valve.

Answer 8

A ball valve is control activated by a leaver and it floats to close the water.