Solving gas-flow problems with a semi-open impeller
This company recently worked with Eastman Chemical to address a problematic vertical inline-style pump, which experienced erratic, periodic vapor locking. The gas load was too high for the pump’s closed-style impeller and casing to handle. To optimize the system, suction pressure, flow, head, gas concentration and piping layout were evaluated. This company was able to provide an API OH2-style pump (photo), using a special semi-open impeller, which is suitable for three-phase liquid service. This special pump hydraulic design allows, in certain working conditions, up to 25% entrained gas by volume in the liquid without any impact on the pump’s performance. Booth 4004 — Emile Egger & Cie SA (Egger Pumps), Cressier, Switzerland