What type of check valves are especially well suited for use with fluids containing solids or viscous materials and are available in horizontal, vertical, and angle designs?
A. Lift check valves
B. Ball check valves
C. Swing check valves
D. Plug check valves
A. Incorrect. 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. Correct. 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.
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