"Multiplicity ought not to be posited without necessity."
— Occam's Razor
Articles about Split Flow™
The United States Patent Office has issued the patent for the 2015 edition of Split Flow — an innovative API centrifugal pump that employs two different impellers in the same pump casing. The new Split Flow applies to both overhung and between bearing pumps. The new patent is a substantial upgrade from the original, 1997 version of Split Flow, which only covered overhung pumps.
This Split Flow application involves a two-stage, API between-bearings centrifugal pump. This design features a radially split centerline-mounted case designed for high-temperature (up to 800°F) hydrocarbon service. The Split Flow feature precludes the need for two separate pumps and saves energy when one pump is used for two separate process flowstreams. The pump is effectively two pumps in one.
Essential facts, specifications and parameters of the new Split Flow patent.
The Split Flow patent applied to a single-stage, API overhung centrifugal process pump — either horizontal or vertical inline. The Split Flow feature incorporates a low-flow auxiliary impeller which receives inlet liquid from the discharge of the primary impeller. The Split Flow feature allows the economy of combining two separate pumps into one. See Little Split Flow design configuration options.
When process designs use API Standard 610 centrifugal pumps for Dual-Service applications, use of the Split Flow™ feature provides unique benefits, detailed here.
Application for U.S. Department of Energy National Industrial Competitiveness Through Energy, Environment, and Economics (Nice 3) Program. Includes many important Split Flow facts.
The efficiency of the Split Flow application saves energy, and thus reduces carbon emissions — anywhere from 233 to 433 metric tonnes of CO2 per year.
Engineers in every discipline need to be alert for opportunities to save capital and reduce operating costs. The Split Flow™ option is a new way of reducing operating and capital costs for auxiliary systems.
Split Flow provides cost-saving option to common process problem.
The API 610 Taskforce has noted that the two-impeller design for dual service "...has a niche where it is desirable and does not want to discourage its application by inclusion."
Use of the Split Flow feature with process pumps allows the specified operating range to be closer to BEP (best efficiency point), as recommended by the API Standard 610 hydraulic fit criteria. This optimized pump-to-system fit reduces the pump's minimum flow and simplifies turndown control.
About Split Flow™
“The obvious often escapes us.”