Valves

Question 1

What is another name for a gate valve?

Answer 1

Wedge or knife valve

Question 2

Where would you use a globe valve?

Answer 2

Throttling applications

Question 3

What does wog stand for?

Answer 3

Water, oil, gas

Question 4

What does WSP stand for?

Answer 4

Working steam pressure.

Question 5

What kind of flow does a ball valve create?

Answer 5

Laminar

Question 6

What is the purpose of a check valve?

Answer 6

Prevent back flow or reverse flow within the piping system

Question 7

What one some different names for cheat valves?

Answer 7

Non-return, reflux, retention, foot and one-way valve

Question 8

What are some advantages / disadvantages of diagram pumps?

Answer 8

Advantages
Throttling usage
Used for different materials
No steam leak or packing to be serviced
Disadvantages
Corrosion / abrasion are factors
May erode quickly if used for serve throttling

Question 9

What are some advantages/disadvantages of ball valves?

Answer 9

Advantages
- quick to open/close
- small/light
- minimal resistance
- available in multi part design
Disadvantages
- not suitable for sustained periods for throttling
- removing handle is not locking out

Question 10

What are some advantages / disadvantages of a butterfly valve?

Answer 10

Advantages
- compact/require minimal space for installation
- light weight
- available in NPT 1.5 to 200 inches
Disadvantages
- throttling is limited from 30 - 80 degrees of the disc opening
- prone to cavitation or chocked flow when used for throttling
- turbulence will affect the movement of the disc