Multistage Fabricated Centrifugal Blowers

There are three designs of Spencer multistage fabricated machines: standard overhung (SOH), four-bearing overhung (4BOH) and four-bearing outboard (4BOB). Sheet steel construction is standard for blower housings, but other metals can be selected for specialized resistance in cases involving extremely high temperatures, chemicals or corrosive conditions. With housing diameters from 14″ to 88″, these blowers can handle volume to 25,000 ICFM, pressure to 20 PSIG and vacuum to 15″ Hg.

Description

Spencer multistage fabricated blowers cover an extensive line of styles and models used for a wide range of air/gas services in industrial, commercial, institutional and municipal applications. The three basic designs are standard overhung SOH (impellers mounted on extended motor shaft), four-bearing overhung 4BOH (impellers mounted on shaft coupled to motor shaft) and four-bearing outboard 4BOB (impellers mounted on shaft supported at both ends by self-aligning ball bearings, coupled to motor shaft).

SOH and 4BOH machined are noted for the trademarked “sugar scoop” profile of their housings. These are among Spencer’s oldest products, so the sugar scoop profile is your visual assurance of genuine Spencer quality that has endured for more than a century.

These blowers are manufactured of heavy gauge, cold-rolled sheet steel with a tensile strength of 50,000 psi, welded and reinforced, creating an extremely rugged construction. The inlet, outlet and housing are built as an integral structure for greater strength. The fabricated construction allows easy substitution of other metals to counter very high temperatures, chemical or corrosive conditions. We routinely use Hastelloy®, monel, various stainless steels, aluminum, Cor-Ten® steel and many others that provide specialized abilities.

The rotating impeller assembly within the blower housing has ample clearance, 1/8″ or more, for simple, low-maintenance operation. The entire rotor assembly is dynamically balanced to ensure mechanical operation below 1.5 mils total amplitude on the bearing housing at design speed. With housing diameters from 14″ to 88″, these blowers can handle volume to 25,000 ICFM, pressure to 20 PSIG and vacuum to 15″ Hg.

Manufacturer

Since 1892, The Spencer Turbine Company has applied a unique Engineering Edge to create innovative solutions for air and gas handling problems. Today, the world faces extreme challenges in the areas of energy and the environment. They call these issues E2 and are addressing them with our own E2 combination of Engineering and Experience.

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