What is true about flow control valves regarding built-in check valves?

Flow control valves are essential in hydraulic systems as they regulate the flow rate of fluid through the circuit. The presence of built-in check valves in these devices can vary significantly based on the design and intended application of the specific valve.

When stating that most do not include a built-in check valve, it reflects the reality that many flow control valves are designed primarily to manage flow rates rather than prevent backflow. While check valves serve an important function in some applications by allowing fluid to flow in one direction and preventing reverse flow, not all flow control valves incorporate this feature as a standard.

This understanding aligns with the fact that flow control valves are often selected based on the needs of the system and may or may not feature additional components such as check valves, which are specialized for certain situations. Therefore, it is accurate to assert that the majority of standard flow control valves typically do not come with built-in check valves, although some specialized models may include them depending on the manufacturer and specific functionality required.