What type of check valve has a disc-shaped flow control element that lifts up off the seat as fluid flows through it and drops back onto the valve seat if the fluid flow stops or attempts to flow in a reverse direction?
A. Lift check valves
B. Ball check valves
C. Swing check valves
D. Plug check valves
A. Correct. Lift check valves have a disc-shaped flow control element that lifts up off the seat as fluid flows through it (forward flow) and drops back onto the valve seat if the fluid flow stops or attempts to flow in a reverse direction (backward flow).
B. Incorrect. Ball check valves are especially well suited for use with fluids containing solids or viscous materials and are available in horizontal, vertical, and angle designs.
C. Incorrect. A swing check valve is used to control the direction of flow and prevent process fluid contamination or damage to equipment caused by backflow.
D. Incorrect. Plug check valves are not a type of check valve.
You might also like to view...
In the U.S. Department of Agriculture's land capability classification systems, some 15% of the Nation's cultivated land is in Class I
Indicate whether the statement is true or false
The circuit in Fig. 5.79 is for a difference amplifier. Find v? given that v? =1V and v? = 2V.
 FIGURE 1.png)
The vendor begins using heavier packaging, which increases the weight of each package by 50 g.
a. How does this affect the mean weight of the packages? b. How does this affect the standard deviation of the weights?
[?] suspensions can alter vehicle ride height and shock absorber damping while the vehicle is in motion
What will be an ideal response?