Which component has the same basic configuration and operation as the make-up valve?

Which component has the same basic configuration and operation as the make-up valve?

• A. Unloading valve
• B. Bypass valve
• C. Gland seal regulating station
• D. Stop-check valve

Answer: (A)

The main idea here is that makeup and unloading valves share the same way of controlling flow. Both are spring-loaded, direct-acting regulators that use a movable element (like a valve stem or piston) seated on a valve seat. Fluid pressure on one side and the spring on the other work together to keep the flow in balance: when system pressure drops below the set point, the valve moves to admit makeup fluid or air; when pressure rises, the spring pushes the element back to close. This is why the makeup valve is described as having the same basic configuration and operation as the unloading valve. The other devices serve different roles. A bypass valve simply provides an alternate path for flow, not regulation to maintain a set pressure. A gland seal regulating station is a more specialized regulator setup for gland seals, not the same basic valve arrangement. A stop-check valve is a check valve with a stopping feature to prevent backflow, not a regulator that meters flow to maintain pressure.

The main idea here is that makeup and unloading valves share the same way of controlling flow. Both are spring-loaded, direct-acting regulators that use a movable element (like a valve stem or piston) seated on a valve seat. Fluid pressure on one side and the spring on the other work together to keep the flow in balance: when system pressure drops below the set point, the valve moves to admit makeup fluid or air; when pressure rises, the spring pushes the element back to close. This is why the makeup valve is described as having the same basic configuration and operation as the unloading valve.

The other devices serve different roles. A bypass valve simply provides an alternate path for flow, not regulation to maintain a set pressure. A gland seal regulating station is a more specialized regulator setup for gland seals, not the same basic valve arrangement. A stop-check valve is a check valve with a stopping feature to prevent backflow, not a regulator that meters flow to maintain pressure.