Medium crystallization problem

Valve failures may lead to system shutdowns and even safety accidents. The following are common problems and countermeasures: 1. Leakage: Seat wear: Regularly replace the sealing ring or grind the valve seat. Packing box failure: Use graphite or PTFE packing to enhance the sealing performance.   2. Sticking: Medium crystallization: Use steam tracing or clean the pipeline (for example, in a urea plant, flush the check valve with hot water). Actuator failure: Check whether the air supply pressure or the motor torque meets the standard.   Maintenance suggestions: • Lubricate the valve stem every quarter and conduct a pressure test every year. • Establish a valve file to record the maintenance history and the replacement cycle of spare parts.