New in Pumps & Systems:
These innovative API process pumps offer simple, efficient, reliable and cost-effective operation for many processes. See full article in Pumps & Systems.
The philosophy of William of Ockham (1285–1349) is the inspiration for a unique pump innovation used for petrochemical refining. Split Flow™ simplifies the current practice of selecting multiple or oversize pumps for dual service applications. In doing so, Split Flow embodies the maxim, “everything should be as simple as possible, but not simpler.” (See full article, pages 63-65.)
The Split Flow modification uses the same pump case, primary impeller and bearing bracket as standard pumps. Only the case cover and shaft are modified to incorporate the auxiliary impeller; the case cover and shaft are modified to incorporate auxiliary impeller; the case cover seal chamber remains in compliance with API 682. By Heinz Bloch,
February, 2002. Addendum.
Big Split Flow is an adaptation of the API Standard 610 two-stage, between-bearings centrifugal process pump. This adaptation allows two, like-liquid services to be satisfied by a single pump. Selected by Les Kane, Stephany Romanow-Garcia and David Nakamura (editors), Hydrocarbon Processing, September 1998.
Split Flow incorporates an auxiliary low-flow impeller
in an API Standard 610 overhung process pump, which effectively becomes two pumps-in-one. The Split Flow concept saves
energy by allowing use of smaller motors. Hydrocarbon Processing, January 1998.
Pumps and Systems Magazine
Split Flow is a unique design modification wherein a pump inlet flow is separated into two outlet flowstreams: a high-flow, low-head main stream and a lower-flow, higher-head slipstream. The pump effectively becomes two pumps in one with a common suction and both primary and secondary discharges.
Process requirements often demand capacities below those achievable with a conventional centrifugal pump.
American Petroleum Institute Literature
Innovative energy-conserving approaches should be aggressively pursued by the manufacturer. API Standard 610, 8th Edition, August 1995
Igor J. Karassik
Igor Karassik discusses some misconceptions about
desirable construction features of centrifugal pumps.
A three-part series which examines the performance of centrifugal pumps operating at flows either higher or lower than the rate for which they were designed to achieve their highest efficiency. Published in Chemical Processing, April (part 1), May (part 2), June 1987 (part 3).
civilization as we know it today could not exist. By Igor Karassik
In Memoriam: Igor Karassik
Igor Karassik (1911-1995) contributed to the pump industry with an elegant meld
of technical development, commercial reality, and education. By
J. T. (Terry) McGuire