Ball Valve
The materials most commonly used to create the ball within the ball valve.
What is Teflon and Stainless steel
What is a weakness to the Diaphragm valve?
The diaphragm is prone to tearing.
In a gate valve, is the gate attached to a stem?
Yes.
Are butterfly valves used with pneumatic actuators?
Yes.
What are the two types of globe valves?
Screw Down Non Return (SDNR); and
Screw Down Screw Lift (SDSL).
True or False
The ball valve is excellent at throttling a medium.
False
Ball valves should not be used to throttle a medium.
Are Diaphragm valves used in more in liquid or pneumatic systems?
Liquid
Does the gate raise and lower, or twist in place?
Traditionally the gate will raise or lower.
Do butterfly valve gates move up and down, or twist in place?
The gate twists in place
Is the stem always attached to the flapper in a globe valve?
Not with the Screw Down Non Return (SDNR) style
Why choose a ball valve?
A ball valve is great when you don't want any obstructions that the medium may catch upon while transversing through your valve.
Are there different Diaphragms for different mediums/temperatures?
Yes.
A white diaphragm usually signifies hot water.
What is a common point of failure in a Gate valve?
The gate will detach from the stem.
What an advantage to using a butterfly valve?
Its ability to be rapidly open or closed.
Can a globe valve also act as a check valve?
Yes.
Screw Down Non Return (SDNR) can act as a swing check valve.