Page 318 - Centrifugal Pumps 2E

15

Chemical

Pumps

Metallic and

Nonmetallic

by Frederic W. Buse
Ingersolf-Rand Company

Chemical pumps are designed for many processes and products that are
not normally handled by pumps designed for a single product or process
such as general water pumps, boiler feed pumps, cooling water pumps,
or petroleum industry pumps. The chemical processes vary from acids,
alkalies, toxics, reducing agents, oxides, slurries, organics, or inorgan-
ics causing corrosion, erosion, galvanic action, or leaching to occur on
the pumps and piping system and any other product in the process.
To handle this variety of conditions, the pumps employ various materi-
als such as 316 stainless steel, ductile iron, alloy 20, titanium, Hastelloy
B and C. The continuous development of nonmetallics also make these
pumps available in vinyl esters, epoxies, PVC, or with linings of teflon.
Some pumps employ carbon, ceramic, and glass bodies or linings.
ANSI Pumps

Specifications
Most chemical pumps in the United States in the past 25 years have
been developed according to the ANSI B73.1M and .2M specifications
for horizontal and vertical pumps respectively (Figures 15-1 and 15-2).
These specifications were initially developed in 1955 and were published
in 1962. The current specifications were published in 1991. Besides
safety criteria, the main objective for these specifications was to establish
dimensional standards and interchangeability of various size pumps

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