Page 27 - Rotating Machinery Pratical Solutions to Unbalance and Misalignment

Rotating Machinery: Practical Solutions

example, centrifugal pumps should have a block off test run to
determine the actual head produced. The voltage and amperes
should be measured and the actual horsepower consumed calcu-
lated. These data should be plotted on the pump’s performance
curve and a record maintained.
A comprehensive listing of all equipment should be as-
sembled, and any missing data should be requested from the
manufacturer. Further, this will assist in determining what spare
parts need to be carried in inventory, and what parts may be in-
terchangeable.

EQUIPMENT IDENTIFICATION
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No. Category Value Yes/No
————————————————————————————————
1 Hazardous Service 5.00
2 Critical to Operations 3.50
3 Chain Reactive 2.00
4 Expensive to Repair 1.50
5 One of a Kind 2.00
6 Long, Tedious Repair 1.10
7 Hard to find Parts 1.10
————————————————————————————————
Total Points
————————————————————————————————

The above form is filled out for each piece of equipment and
then they are ranked by points. The equipment with the most
points is the most critical and deserves the most attention.
The above categories are further defined below:

1. Hazardous Service
This category of equipment can be a result of high tempera-
ture, high pressure, high velocity or the specific material
being handled. Caustic, poisonous, corrosive, and flammable
materials should be considered and assigned an appropriate
value.