Modified design for clogged orifice plates in standard flow meters
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For standard orifice plate flow meters, the orifice is located at the center; blockage affects the pressure difference across the orifice, so it is necessary to make adjustments. Are annular and eccentric configurations feasible?
When the central hole of a standard orifice flow meter tends to get clogged, it is indeed possible to consider using an eccentric orifice plate or an annular orifice plate: 1. Eccentric orifice plate: – The orifice diameter is located off-center, at the lower part of the pipe, which facilitates the passage of dirt and solid particles. - Suitable for media prone to deposition and clogging, such as fluids containing solid particles or impurities. 2. Annular orifice plate: – It features an annular opening with a large orifice area; these openings are located along the wall of the pipe, resulting in more uniform flow conditions and reduced risk of clogging. - Suitable for media containing dust, a small amount of solid particles, or fibers. Both methods can effectively reduce clogging, minimize measurement errors caused by clogging, and improve the reliability of orifice plate flowmeters. The actual modification must be selected based on the on-site operating conditions and the properties of the medium. .