Glossary of Pump Terms: O
O.D.
Outside diameter.
O.E.M.
Original equipment manufacturer. The pump or seal company, not
the distributor of the products.
Oil analysis
A sensible preventative maintenance technique to check the oil
for solids, water etc.
Oil life
Lubricating oil has a useful life of about thirty years at thirty
degrees centigrade if it is not contaminated.
Oil mist
A lubrication system where oil and air are mixed and sent into
the pump bearing case. Not friendly to the environment.
Operating length
Measured after the seal has been compressed the proper amount.
The measurement is usually made from the face of the stuffing
box.
Optical flat
A high quality glass lapped flat on one side and used with a
monochromatic light to read seal face flatness.
O-ring groove
The space into which an O-ring is inserted. Dynamic O-ring grooves
use a different dimension than static O-ring grooves.
OSHA
Occupational and Safety Health Act. Government regulations that
affec the sealing business. OSHA 1910 is one of the more important
that impacts the training of seal mechanics and operators.
Over hung impeller
Not supported with bearings on either side of the impeller.
Oxidizer
Combines with carbon to form carbon monoxide or carbon dioxide.
The oxidizers attack all forms of carbon including the seal face
and any black O-rings in the system.
Ozone
Created by oxygen atoms combining with oxygen molecules in a high
energy atmosphere .Will prematurely age Buna rubber. Ozone forms
in the shop as a result of the sparking of electric motor brushes.
|