A reference to a pressure
that measures below atmospheric pressure.
VISCOSITY
A liquid has a viscosity
of one poise if a force of one dyne per square centimetre
causes two parallel liquid surface one square centimetre
in area and one centimetre apart to move past one another
at a rate of one centimetre per second. There are a
great many crude and empirical methods for measuring
viscosity which generally involve measurement of the
time of flow or movement of a ball, ring, or other object
in a specially shaped or sized apparatus. The viscosity
of water is 1 centipoise.
VITON A
Trade name for material
used in gaskets and o-ring.
VOLUMETRIC FLOW RATE
Fluid flow expressed as
a volume flowing per unit of time (cc3/sec., ft3/min.,
etc.).
