Owner's manual

Product Description

General description

Model 3298

Model 3298 is a sealless, close-coupled or frame-mounted, centrifugal pump with an enclosed

impeller that is driven by a synchronous magnetic coupling. All sizes of the 3298 meet the

dimensional standards of ANSI B73.1 except for 1x1.5-5 and the 1.5x2-6.

Model SP3298

SP3298 is a self-priming, sealless, close-coupled or frame-mounted, centrifugal pump with an

enclosed impeller that is driven by a synchronous magnetic coupling. The pump and the frame

or adapter feet locations meet ANSI B73.1 dimensional standards.

Model V 3298

V3298 is a vertical in-line, sealless, close-coupled centrifugal pump with an enclosed impeller

that is driven by a synchronous magnetic coupling. Model V3298 meets the dimensional

standards of ANSI B73.2.

Casing

The casings are one-piece cast ductile iron lined with 1/8-inch Tefzel®1 and have ANSI class

150 flanges with a Tefzel® raised face. The 3298 and SP3298 are end-suction, top centerline

discharge, and are self-venting. The V3298 is side-suction, side-discharge, and is also self-

venting.

Impeller magnet assembly

The 3298 family uses a one- or two-piece impeller magnet assembly. The magnet ring is

balanced to ISO 1940 G6.3 levels and is sealed within the solid, enclosed Tefzel® impeller

magnet assembly.

Stationary shaft

The impeller magnet assembly rotates about a solid stationary silicon carbide shaft. The shaft

is supported at one end by the containment shell and at the other end by the Tefzel® bearing

spider.

Bearing spider

The bearing spider, constructed from solid Tefzel®, houses one of the key silicon carbide thrust

bearings in the pump and supports the stationary shaft at one end.

Rear impeller wear ring

A rear impeller wear ring is standard on M and L group pumps. A wear ring is not required on

theS group. The wear ring is pressed into the rear of the impeller assembly. The wear ring

reduces axial thrust in the M and L group pumps.

Magnetic coupling

The magnetic coupling is a coaxial synchronous type using rare earth magnets of neodymium

iron (NdFe). This concept results in a compact design and allows the impeller to turn at the

same speed as the motor, which means that there is no slip between the drive and the driven

magnets.

Containment shell

The containment shell isolates the pumped liquid from the atmosphere. The containment shell

construction is backed with vinylester FRP.

14 3298 Family Installation, Operation, and Maintenance Manual