What are the maintenance procedures for steam pressure reducing valves?

What are the maintenance procedures for steam pressure reducing valves?

Steam pressure reducing valve is a device that controls the opening of the opening and closing parts in the valve body to regulate the flow of media, reduce the pressure of the media, and adjust the opening of the opening and closing parts with the help of the pressure behind the valve to maintain the pressure behind the valve within a certain range. However, during use, the steam pressure reducing valve requires maintenance, so what maintenance procedures are available for the steam pressure reducing valve? Next, let's share the steam pressure reducing valve - Fushan Valve.

When removing the steam pressure reducing valve, use steel letters to mark the maintenance number on the steam pressure reducing valve and the flange connected to the valve, and record the working medium, working pressure, and working temperature of the valve, so that corresponding materials can be selected for repair. When repairing valves, it is required to carry out in a clean environment. First, clean the outer surface of the steam pressure reducing valve, or blow with compressed air or clean with kerosene. However, remember the nameplate and other marks clearly. Check the external damage and make records. Next, disassemble the other components of the steam pressure reducing valve, clean them with kerosene (do not use gasoline to avoid causing a fire), inspect the damage to the other components, and make a record. Perform a strength test on the valve body and bonnet. For high-pressure valves, non-destructive testing, such as ultrasonic testing and X-ray testing, is also required.

The sealing ring can be inspected with red lead powder to determine the fit of the valve seat and valve flap (valve office). Check the valve rod for bending, corrosion, and thread wear. Check the wear of the valve stem nut.

Handle the detected problems. Repair welding defects of valve body. Overlay welding or renew the sealing ring. Straighten or replace the valve stem. Repair any other components that should be repaired; Replace if it cannot be repaired.

Reassemble the steam pressure reducing valve. During assembly, all gaskets and fillers should be replaced.

Conduct strength test and sealing test.

Fushan Valve (Suzhou) Co., Ltd. was first established in, and due to development needs, an independent legal entity was established: Fushan Valve (Jiangsu) Co., Ltd., with two holding factories in Suzhou and Kunshan. The company is committed to manufacturing high-quality Fushan brand valves in the fields of air conditioning water system, process cooling water (PCW system), compressed air (CDA system), pure water system, electric butterfly valve, electric ball valve, and steam pressure reducing valve, It has a large number of loyal customers including CSCEC, CEC, CEC, and the Institute of Physics of the Chinese Academy of Sciences. Looking forward to your call consultation!