If you have a flow control valve issue after the pump, here are the steps you can take:

1-Check the pump: Verify that the pump is functioning correctly. Ensure it has power, the motor is running smoothly, and there are no pump-related problems. Address any pump issues as necessary.

2-Check the strainer: Inspect the strainer to ensure it is not clogged or obstructed, as this can affect the flow control valve downstream.

3-Inspect the flow control valve: Examine the flow control valve downstream of the pump. Look for visible signs of damage, blockage, or misalignment. Check if the valve is stuck partially closed or fully closed. For manual valves, ensure they are positioned correctly according to system requirements.

4-Check for obstructions: Ensure there are no blockages or debris in the piping system or downstream of the valve that could restrict flow.

Verify the valve settings: Review the settings and parameters of the flow control valve. Ensure the valve is properly adjusted to control the desired flow rate. Check if any control parameters, such as pressure differentials or flow rate limits, require adjustment.

5-Inspect the instrumentation: Check the pressure gauges, flow meters, or any other instrumentation associated with the flow control valve. Ensure they are calibrated correctly and providing accurate readings. Recalibrate or replace the instrumentation if needed.

6-Consider system variables: Evaluate any changes in system variables that could affect the flow control valve, such as temperature, pressure, viscosity, or fluid properties. Make adjustments accordingly.

7-Consult with experts: If you are unable to identify or resolve the issue on your own, seek assistance from mechanical or process control experts. They can provide further troubleshooting guidance, perform detailed analysis, or recommend necessary repairs or replacements.

8-Check for spill back: Verify if there is any spillage or backflow upstream of the flow control valve.

Remember to prioritize safety when working with pumps and flow control valves.

Follow proper lockout/tagout procedures and adhere to relevant safety guidelines and regulations