Common valve fault handling methods The manufacturer teaches you how to deal with valve faults
The valve is a control component in the fluid conveying system. It has the functions of cut-off, regulation, diversion, prevention of reverse flow, stabilization, diversion or overflow and pressure relief. Valves used in fluid control systems, ranging from the simplest shut-off valves to the various valves used in extremely complex automatic control systems, have a wide range of varieties and specifications. Valves are pipeline accessories used to open and close pipelines, control flow, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on.
Stainless steel valve-ball valve
Common valve troubleshooting methods
Common valve failure | Failure cause analysis | solution |
Valve packing leakage | 1. The packing gland is not tightly pressed. 2. The filler becomes invalid due 3. to long-term use or improper storage. | 1. Tighten the nuts evenly to compress the packing. 2. Replace the packing. |
Leakage between sealing surfaces | 1. There is dirt on the sealing surface. 2. The sealing surface is damaged. | 1. Remove dirt and debris. 2. Reprocessing or replacement. |
Leakage at the junction of valve body and bonnet | 1. The connecting bolts are not evenly tightened. 2. The flange sealing surface is damaged. 3. The gasket is cracked or failed. | 1. Tighten evenly. 2. Re-dressing. 3. Replace with new gaskets. |
Handwheel rotation is not flexible or the valve disc cannot be opened and closed | 1. The packing is too tight. 2. Packing pressure plate, pressure sleeve device is skewed. 3. The stem nut is damaged. 4. The thread of the stem nut is severely worn or broken. 5. The valve stem is bent. | 1. Properly loosen the nut on the packing pressure plate. 2. Correct the packing pressure plate. 3. Disassemble and trim threads and remove dirt. 4. Replace the stem nut. 5. Correct the valve stem. |
The above is the treatment method for common valve failure causes. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.) according to materials, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc.