Specifications

Document No. DER01122 DESCRIPTION AND OPERATION

Page 6 of 6 Effective Date 30 Aug 07

VIBRATION SWITCH (CONT’D)

The vibration switch is mounted on the centrifuge base in an orientation that is most affected by

out-of-balance vibration of the bowl assembly. Clogging of the conveyor or worn bearings may

produce sufficiently high vibration to trip the switch.

Figure 1122-5 Vibration Switch

CASE AND BASE

When the top cover is closed, the case provides a sealed, protective enclosure that fully

surrounds the bowl assembly. The liquid discharge chute and solid discharge chute are installed

at the bottom of the lower case half. Mating baffles installed inside the top and bottom case

halves separate the solid and liquid. Bolts secure the top and bottom halves together; a gasket in

the bottom case half seals the two halves.

The case is bolted onto the welded steel base assembly, which contains mounting provisions for

the bearing pillow blocks. The base assembly supports the centrifuge components and contains

hollow rubber vibration isolators that engage with centering pins embedded in the mounting

platform.

The content of this document is subject to change at any time. Information provided does not cover all details or variations possible

with DERRICK equipment; nor does it cover every contingency that may be met in conjunction with installation, operation,

maintenance, or troubleshooting of the equipment. Should additional information be required, or should situations arise that are not

covered by this manual, bring the matter to the attention of your local DERRICK representative or the Service Department at

DERRICK Corporation in Buffalo, New York.