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Dixon Sanitary 2014
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Technical
Flow
See
capacity
Flow Coefficient (C
v
)
The flow in U.S. gallons of water (at 60°F) that will pass through the valve in one minute with a
differential pressure across the valve of 1 PSI.
Fluid End
The portion of the pump that comes in contact with the fluid being pumped.
Fluorocarbon
Elastomer known as FKM a registered trademark of DuPont. (FKM is generic equivalent)
Fluoropolymer
polymer material having a carbon chain either partially or completely bonded to fluorine atoms. FKM (FKM)
and PTFE are examples of this material type.
Foot Valve
A type of check valve. Used at the point of the liquid intake to retain liquid in the system, preventing the loss of
prime when the liquid source is lower than the pump.
Frame
See
C-Face
Friction Head
The pressure needed to overcome the resistance to the flow in the pipe and fittings.
Friction Loss
The part of the total loss that occurs as the fluid flows through straight pipe.
Gas Tungsten-Arc Welding (GTAW)
an arc welding process that produces coalescence of metals by heating them
with an arc between a tungsten (non-consumable) electrode and the work. Shielding is obtained from a gas or gas mixture.
(
This process is sometimes called TIG welding, a non-preferred term.) GTAW may be performed by adding filler material to the
weld or by a fusion process in which no filler is added.
Gasket
static seal made from deformable material compressed between two mating surfaces.
GPM
Gallons per minute
Hard Face
A seal face either rotating or stationary. The most common materials are silicon carbide, ceramic and tungsten
carbide.
Head
The equivalent height of the liquid. 20°C water is used as the standard where 33.9ft of water equals one atmosphere
(14.7
psi). The pressure in a column of liquid. Pressure will increase as the height of the column increases. Head refers to the
height in feet: pressure refers to the PSI. Centrifugal pump discharge is measured in head.
Heat Number
an alphanumeric identification of a stated tonnage of metal obtained from a continuous melting in a furnace.
Heat-Affected Zone
that portion of the base metal that has not been melted, but whose microstructure or mechanical
properties have been altered by the heat of welding or cutting.
Hertz
Frequency (cycles per seconds)
Hex Union Nut
An internally acme-threaded six-sided connector used to assemble some fittings.
Horsepower
Unit for measurement of power or rate of work. One horsepower = 33,000 foot pounds per minute.
Glossary of Terms
Y