Which component is commonly used to change the speed of a pneumatic cylinder's movement?

The flow control valve is essential in modifying the speed of a pneumatic cylinder's movement. This component regulates the amount of airflow entering or exiting the cylinder, allowing for precise control over the speed at which the cylinder extends and retracts. By adjusting the flow control valve, an operator can increase or decrease the air pressure flowing through the cylinder, resulting in faster or slower movement, respectively. This feature is vital in applications where specific timing and speed are crucial for the operation of machinery or automation processes.

The other options do not serve the purpose of controlling movement speed. The pressure gauge primarily measures the pressure within a pneumatic system but does not influence flow rate or speed. The receiver acts as a storage tank for compressed air, maintaining system pressure, while the compressor generates compressed air but does not control the speed of cylinder movement directly. Thus, the flow control valve is the key component in achieving speed adjustments within pneumatic systems.