Choosing the Right Valve for Control
Which of the following valves is better for on/ off control?
a) Butterfly valve
b) Ball valve
c) Plug valve
d) Knife valve
In globe valves, the flow rate control is determined by
a) Size of the opening
b) Lift of the valve plug
c) Pressure difference
d) Gravity
A--------is a connector showing the relationship between the representative shapes.
A. Line
B. Arrow
C. Process
D. Box
Answer:
For the first question, the better valve for on/off control is the Ball valve. This is because it has a simple design, is less prone to clogging, and is capable of tight sealing.
For the second question, in globe valves, the flow rate control is determined by the lift of the valve plug.
For the third question, a Line is a connector showing the relationship between the representative shapes.
Understanding Valves for Control
Ball Valve for On/Off Control: The Ball valve is considered better for on/off control due to its simple design, low chance of clogging, and excellent sealing capabilities. This makes it a reliable choice for applications where quick shut-off is required.
Flow Rate Control in Globe Valves: The flow rate in globe valves is determined by the lift of the valve plug. By adjusting the position of the valve plug, flow rates can be effectively controlled according to the requirements of the system.
Connector in Representational Shapes: A Line is used as a connector to show the relationship between shapes in diagrams or schematics. It helps to visualize how different components or processes are connected to each other.
Overall, choosing the right valve for control applications is crucial to ensure efficient operation and safety in various industries. Understanding the functions and characteristics of different valves can help in selecting the most suitable option for specific needs.