Discrepancies in valve disc elevation refer to inconsistent heights of valve discs among different valves within the same piping system; this results in varying flow resistance and affects the system's normal operation. The primary causes for these elevation discrepancies include the following:
Improper installation: During installation, a lack of technical proficiency or failure to adhere to specifications can result in inconsistent mounting heights for the valve bases.
Valve base wear: Prolonged use can cause wear on the valve base, leading to height inconsistencies and, consequently, variations in valve disc elevation.
Valve disc looseness: Over time, a loose connection between the valve disc and the stem can cause the disc to shift or become loose, resulting in elevation discrepancies.
