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Glossary X
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The following definitions are intended to give basic understanding of the terms
commonly used in the pump industry. Some industry standards, or customer
specifications, may have specific meaning of certain terms that may be different
from their common usage - in such case the terms should be interpreted in the
context of the standards, or specifications, being referred to.
X - a universal symbol for unknown number or variable; a symbol for
multiplication.

X-axis - the horizontal line or principal axis in the Cartesian coordinate system.
In a pump performance curve the flow rate is plotted in the x-axis, and its
corresponding head in the y-axis.

X-Cavalloy - a proprietary and patented austenitic stainless steel casting
material with chromium and manganese alloying elements with good castability.
X-Cavalloy is claimed to have better cavitation resistance than common
commercial stainless steel used in pump parts such as impellers, and is
comparable to stellite material.  X-Cavalloy is a registered trademark by its
owner.  

X-ray inspection - a non-destructive examination (NDE) used to detect the
presence of casting flaw or defect in pump pressure containment parts such as
casing, cover, or barrel. Parts that pass full x-ray examination can use a casting
quality factor of 1.0 (as opposed to 0.80 for non-fully x-rayed parts) in the
calculation of their required minimum metal thickness, or design stress. See
Non-Destructive Examinations (NDE).

Xylem - the name of a commercial pump company engaged in the business of
providing water solutions and technology. (Xylem is a registered trademark by its
owner.)

Xylene - a family of isomeric, colorless aromatic hydrocarbon liquids, such as
benzene among others, widely used in industry as solvent. It is a sweet-smelling
liquid occurring in petroleum products such as gasoline and is produced by the
catalytic reforming of petroleum naphthenic fractions. It is also referred to as
Xylol.

Xylol  - See Xylene.
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