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Glossary Y
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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.
Y-axis - the vertical plane, or ordinate, in the Cartesian coordinate system.


Y-Strainer - A Y-shaped device with perforated or wire mesh straining element
used for removing unwanted solids, or foreign matter, from a process liquid in a
system to protect downstream equipment , such as pump, heat exchanger,
boiler, etc., from being damaged from solids that may pass through the system
with no straining protection.

Y-Strainer is cost effective and compact straining solutions suitable where the
amount of solids to be filtered from the liquid is relatively small, thereby
permitting long intervals between screen cleanings. It can be installed in either
horizontal or vertical position but the screening element must be downward of
the strainer body so that the entrapped material can collected.


Yield point - the point whereby a metal ceases to be elastic and starts to
develop plasticity. Yield point, in mechanical engineering, load at which a solid
material that is being stretched begins to flow, or change shape permanently,
divided by its original cross-sectional area; or the amount of stress in a solid at
the onset of permanent deformation.


Yield strength or yield stress is the material property defined as the stress at
which a material begins to deform plastically whereas yield point is the point
where nonlinear (elastic + plastic) deformation begins.


Young's modulus - the tangent modulus of the initial, linear portion of a
stress-strain curve determined from tensile tests; a measure of the stiffness of
an elastic material; the ratio of tensile stress over tensile strain in the elastic
portion of the stress-strain curve.

Young's modulus ( E ) describes tensile elasticity, or the tendency of an object
to deform along an axis when opposing forces are applied along that axis; it is
defined as the ratio of tensile stress to tensile strain. It is often referred to simply
as the elastic modulus

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