Jiangsu Haifa Machinery Manufacturing Co., Ltd.

Large-scale aromatics complex units place extremely high demands on continuous pump operation, light hydrocarbon sealing, NPSH, and-temperature stability. Taking the raffinate column of the Huajin Aramco project as an example, this column is 118 m in height, 15 m in diameter, and weighs 4,366 t at lifting, making it the world's largest and tallest super-large equipment of its kind among columns of the same type. Aromatics units typically encompass processes such as PX adsorption separation, raffinate, extract, xylene distillation, and isomerization; both UOP Parex™ and Axens Eluxyl® employ simulated moving bed adsorption technology to process C8 aromatics. In such units, OH1 is used for utility and ambient-temperature process fluids; OH2 centerline-mounted pumps are suitable for raffinate, xylene, and high-temperature bottom circulation; OH3 and OH4 are used for compact vertical in-line installations; OH6 high-speed pumps are suitable for low-flow, high-head injection. BB1 is suitable for large-flow circulating water; BB2 is used for high-temperature continuous aromatics transfer; BB3 and BB4 handle medium-to-high-pressure multistage boosting; BB5 double-casing multistage pumps (barrel pumps) are suitable for high-pressure feed; propylene recycle pumps; propylene feed pumps and product export. VS1 is used for water and underground sumps; VS4 and VS5 are used for wastewater, condensate, and below-grade discharge; VS6 and VS7 vertical can pumps are suitable for low NPSHa, easily vaporized aromatics, and underground tank transfer. Jiangsu Haifa Machinery Manufacturing Co., Ltd. www.jslgpump.com can provide API 610 OH, BB, and VS series process pumps, and performs engineering selection for aromatics units based on Flow, Head, Vapor Pressure, NPSHa/NPSHr, API 682 Seal Plan, and Material Selection. API 610 13th edition was released in June 2026 and continues to serve as an important standard for centrifugal pumps in the petroleum, petrochemical, and natural gas industries. Summary references [1] API Std 610, Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries. [2] Honeywell UOP, Parex™ Aromatics Recovery Technology. [3] Axens, Eluxyl® Paraxylene Purification Technology. [4] Liaoning Provincial Government/Xinhua Net, engineering data on the raffinate column of the Huajin Aramco aromatics complex unit. https://www.jslgpump.com