Valves Flashcards
What does WOG stand for?
Water Oil Gas
What does CWP stand for?
Cold Working Pressure
What does WSP stand for?
Working Steam Pressure
The higher the operating temperature that a valve is subjected to, the ______ its pressure rating is.
Lower
When can you use soldered connections?
On low pressure and low temperature applications
Can you use a gate valve for throttling?
No, it must be fully open or fully closed or else it will damage itself
What positions can a bonnet be in?
It must always be in a up or horizontal position, never downwards.
Bonnet is the frame of a gate valve and other valves
What does a ball valve use to block off the water?
A spherical plug with a passage bored through it
Can you use a butterfly valve to throttle fluids?
Yes they are often used to throttle fluids
When a valve has multiple redirections of the fluid, what happens to the fluid at each redirection?
There is a pressure drop every time the fluid changes direction
When are needle valves used?
When there is a need for precise fluid flow control
How many times does the fluid change direction in a globe valve?
Twice
What an advantage of a balance valve?
They require much less force to operate then conventional globe valves
When are diaphragm valves used?
When throttling corrosive and toxic fluids
What are the three basic parts of a diaphragm valve?
The valve body
The valve bonnet assembly
The flexible disc or diaphragm (the closing element)
