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Plumbing Module 2 > Ball Valves > Flashcards

Flashcards in Ball Valves Deck (8)
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1

Explain the way a Portsmouth ball valve is designed.

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

2

List 3 advantages of the garston.

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

3

How does the equilibrium ball valve shut off the water?

Utilises the water pressure to help them to close.

4

Where are equilibrium ball valves used - list 3 places?

Ask mike.

5

State Archimedes principle of floatations.

Ask mike.

6

List 3 defects that occur with ball valves.

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

7

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

Ask mike.

8

Define a ball valve.

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