Valve leakage is a common and vexing problem in industrial production. To ensure productivity and safety, it is critical to understand how to diagnose the cause of a leak, take appropriate remedial measures, and implement effective preventative measures. Below is a guide to solving valve leaks specifically for industry.
First, quickly diagnose the source of the leak
First, pinpointing the source of the leak is critical. Leakage can stem from sealing surface wear, material deterioration, improper installation, operational errors or media corrosion and other factors. With the help of advanced detection tools, such as ultrasonic leak detector, combined with visual inspection and pressure test and other traditional methods, you can quickly locate the leakage point, to provide strong support for subsequent repair work.
Second, targeted solution to the leakage problem
Leakage caused by dislodged closure parts
Reason: Improper operation leads to jamming or excessive wear of the closure parts, and the material of the connection parts is not resistant to corrosion or wear.
Solution: operate the valve correctly, avoid excessive force; regularly check and strengthen the connection between the closure piece and the valve stem; choose corrosion-resistant and wear-resistant material for the connection piece.
Leakage at the sealing ring connection
Reason: Seal ring installation is not tight, poor welding quality or threads, screws loose corrosion.
Solution: Use adhesive to reinforce the sealing ring; repair welding defects and re-welding; replace corroded or damaged threads, screws; according to the specification of the sealing ring welding connections.
Valve body and valve cover leakage
Cause: Casting defects, freezing cracks, poor welding or impact damage.
Solution: Improve casting quality and strength test; insulation treatment for low-temperature valves; operate according to welding procedures and flaw detection and strength test; avoid stacking heavy objects on the valve or impact.
Sealing surface leakage
Reason: uneven sealing surface, incorrect stem connection or wear, stem bending or improper assembly, improper material selection.
Solution: Select the appropriate gasket material and type according to the working conditions; carefully adjust the valve operation; tighten the bolts evenly and use a torque wrench to ensure that the preload; repair, grind and check the static sealing surface; keep clean when installing the gasket.
Leakage at packing
Reason: improper selection of packing, incorrect installation, aging, low precision of valve stem or damaged parts.
Solution: choose suitable packing according to working conditions; install packing according to specifications; replace aging or damaged packing; repair or replace bent or worn valve stem; repair or replace damaged parts in time; comply with operating procedures, smooth operation of the valve.
Third, the implementation of effective preventive measures
Regular inspection and maintenance
According to the frequency of use of the valve and the working environment, develop a detailed maintenance program. This includes cleaning the internal and external surfaces of the valve, checking the looseness of fasteners, lubricating transmission parts, etc. Through regular maintenance, potential problems can be identified and dealt with in a timely manner to extend the service life of the valve.
Selection of high-quality valves
The key to reducing the risk of leakage at the source is to select high-quality valve products. These products from the choice of materials, structural design to the production process have been strictly controlled to ensure excellent performance.
Correct operation and installation
Follow the operating procedures and operate the valve correctly. During installation, pay attention to the installation position and direction of the valve to ensure that the valve can be opened and closed properly. Also, avoid applying excessive force or impact to the valve.
By following this guide, industry can deal with valve leakage more effectively, improve productivity and ensure production safety.
Translated with DeepL.com (free version)
