Greening the refining process.
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"Multiplicity ought not to be posited without necessity."

Occam's Razor
William of Ockham (1285-1349)


Otherwise stated:
Everything should be as simple as possible, but not simpler.

About Split Flow™

 

Basic Split Flow Facts and Applications

When process designs use API Standard 610 centrifugal pumps for Dual-Service applications, use of the Split Flow™ feature provides unique benefits, detailed here.


Split Flow Process Pumps Save Energy
Application for U.S. Department of Energy National Industrial Competitiveness Through Energy, Environment, and Economics (Nice 3) Program. Includes many important Split Flow facts.

 

Carbon Dioxide Reduction
Split Flow can save from 233 to 433 metric tonnes of CO2 per year. Read how here.


The Split Flow™ Option
riskEngineers in every discipline need to be alert for opportunities to save capital and reduce operating costs. We must prevent our habits from blinding us to new ways of improving our plants. The Split Flow™ option is a new way of reducing operating and capital costs for auxiliary systems.


Process Engineering Assessments
Split Flow provides cost-saving option to common process problem.


Little Split Flow™

little split flowA single-stage, API overhung centrifugal process pump, either horizontal or vertical inline, 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.


Big Split Flow™

bigA two-stage, API between-bearings centrifugal process pump with radially split centerline-mounted case designed for high-temperature (up to 800°F) hydrocarbon service. This 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. Patents Pending.

Summary Comparison of Big and Little Split Flow features

Split Flow displays and comparisons

Typical Pump Services With Crude Atmospheric Distillation Tower

overAPI Standard 610 and Overhung Pumps
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."


Minimum Flow Bypass
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.


Capital and operating savings at Shell refinery
Split Flow Pumps save Shell project $240,000 Capital and $25,000 per year operating costs.
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Split Flow API centrifugal pumps: Save energy, reduce carbon emissions.