Visual inspection is an essential part of valve maintenance and can help identify potential issues or damage during valve inspection that may affect the valve’s performance.
Examine the external components of the valve, including the body, bonnet, stem, handwheel, and any other visible parts. Look for signs of corrosion, leaks, cracks, or any other visible damage. Check for loose or missing bolts, gaskets, or seals.
Operate the valve through its full range of motion to ensure smooth operation. Observe the valve’s movement and listen for any unusual sounds, such as grinding, scraping, or excessive noise.
Valve Inspection Checklist:
Valve evaluation is typically conducted on-site at the factory before shipment, and it’s especially popular for first-time purchases from valve suppliers in India or China.
Inspectors will assess the equipment based on various criteria, using ISO 2859 sample plans or G2 inspection sample plans to determine sample size and acceptance criteria for quality inspection of valves. This process is carried out before the valves are shipped, ensuring a thorough evaluation of their quality.
𝗦𝘁𝗲𝗺 𝗮𝗻𝗱 𝗣𝗮𝗰𝗸𝗶𝗻𝗴:
Inspect the valve stem for signs of bending, corrosion, or excessive wear. Check the stem packing for leaks or damage. If the valve has a gland nut, ensure that it is properly tightened but not overly tightened.
𝗦𝗲𝗮𝘁 𝗮𝗻𝗱 𝗗𝗶𝘀𝗰:
Inspect the valve seat and disc for signs of damage, wear, or pitting. Look for any foreign objects that may be lodged between the seat and disc. Ensure that the disc moves freely and seats properly when closed.
Check the valve connections, such as flanges or threaded connections, for leaks, damage, or signs of loosening. Tighten any loose connections as necessary.