Preventive maintenance of control valves
Thread Content
Control valves are the most commonly used end-control elements in the process industry; they determine whether process control is timely and effective. They play a crucial role in the entire control loop, yet have long been a area with relatively weak technical capabilities. If the control valve fails, the control circuit will be forced to interrupt the control operation, which could lead to more serious system failures and cause immeasurable economic losses. Users have an urgent need to monitor and evaluate the status of control valves in process industries, that is, to identify and diagnose control valve failures. Let’s discuss what the typical maintenance methods and principles for control valves are
Pneumatic control valves have many air-related faults; it is necessary to check on a regular basis whether the air supply is functioning properly and whether there are any leaks. Condensate water should be drained frequently during winter； Regularly check whether the packing is leaking or stuck ； Check whether the locator is working properly.