Valves And Piping Flashcards
Which of the valve is directly connected to the piping?
The body of the valve
How many 2” pipes are required to carry the same flow as one 8” pipe?
It takes 16 2” pipes
Why are tampered threads used on pipe?
Better seal
What valve is used when there is limited room fof stem travel?
Non rising stem (know the picture difference between rising and non rising)
Which way must a split gate valve stem be in order to open
Vertical
What condition is caused when particles do not move smoothly paralell and causes abrubt changes in flow direction?
This is called turbulent flow
Which valve is commonly used to isolate a component of a system?
Gate valve
Why is a bypass valve used for on a 6” valve?
To equalize the pressure on both sides
How is tubing measured?
It is measured by the outside diameter
How do measure pipe?
Up to 12” is it the inside diameter, after 12” it is the outside diameter
What angle of flare is used for high pressures?
37 degres
What is the recommended slope for air line?
1-2” per 10 feet
What is NPFT?
National pipe fuel thread
What type of valve is used for fine throttling?
Needle valve is used
What is a curved tube that measures pressure?
It is the bourdon tube
