A
This type of valve is most widely used in industry.
Ball valve
what does WOG stand for?
Water, oil and gas
An OS&Y valve refers to an _______.
outside screw and yoke
Small valves are considered to be what size?
2" or smaller
what was the name of the video you watched regarding valves?
Choosing the right valve
What type of valve is most suited for throttling?
Globe
What does WWP stand for?
Working Water Pressure
What is the tearing of the surface that occurs when 2 pieces of metal slide across each other under high contact stresses?
Galling
large valves are considered to be what size?
larger than 2"
state the 2 principal functions for the use of valves?
start or stop flow and regulate flow
Name me 2 valves that are non directional.
gate, plug, ball, butterfly
What does WSP stand for?
Working steam pressure
How many leak classifications are there and name 3.
6 classes
there are 4 main types of disc designs for a gate valve. name them.
solid wedge, flexible wedge disc, split wedge disc and double disc
Check valves are designed to prevent _____?
backflow
according to the IPT, what are the 8 basic valve designs. Write it on the board.
gate, globe, check, diaphragm, ball, butterfly, plug and relief
What is the ideal valve location. Between 3' 6" and _____?
4"6"
true or false. A plug valve is directional.
False
there are 3 main designs and flow patterns of globe valves. name them,
straight pattern, angle pattern and y pattern
What kind of material are the seats made of when talking about a ball valve?
Teflon material
How many end connections are there, according to the IPT.
7
Valve that require only a 90 degree turn from fully open to fully closed are classified as what?
1/4 turn
What is required in most plants before any component can be removed from a system or piece of equipment?
Safe work permit
there are 3 main categories of check valves. name them
lift checks, swing checks and non-slam checks.
Which valves are ideally suited in services which carry suspended matter, slurries and solid powder flows?
pinch valves