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Dixon Sanitary 2014
800.789.1718
Technical
Durometer Hardness
A numerical value which indicates the resistance to indentation of the blunt indentor of the
durometer.
Dynamic Head (System Head)
A moving fluid exerts a pressure higher than the static pressure due to the kinetic
energy of the fluid.
EPDM
Ethylene propylene diene monome, a synthetic rubber.
Efficiency
Power out of the pump divided by power into the pump.
Efficiency Formula:
TDH X GPM
HP X 3960
Elastomer
Any of various elastic substances resembling rubber.
Elastomeric Material
a material that can be stretched or compressed repeatedly and, upon
immediate release of stress, will return to its approximate original size.
Electropolishing
a controlled electrochemical process utilizing acid electrolyte, DC current, anode and cathode to smooth
the surface by removal of metal.
Electric Actuator
An electro-mechanical device used to open and close or modulate a valve. The actuator
(
which is mounted and coupled to the valve in similar fashion as the pneumatic actuator), operates the valve using
an electric motor driving a gear train. While the basic function of the electric actuator is similar to the pneumatic, there are distinct
differences in the application and flexibility of the two types, and these differences should be considered to select the proper
type.
Electric Fail-safe Actuator
Electrically driven actuator that contains an internal spring to close the valve on
loss of electricity.
Encapsulation
The enclosing of material by an encapsulant for protective purposes. In a ball valve the ball is
encased in PTFE, for example, preventing the material flowing through the valve from getting behind the ball causing
contamination problems.
Eye of the Impeller
The center of the impeller where the fluid enters.
Fail-Closed
Spring return pneumatic actuator is applied to the valve such that the spring will drive the valve to
the closed position upon loss of air (may be termed air-to open).
Fail-Open
Spring return pneumatic actuator is applied to the valve such that the spring will drive the valve to the open
position upon loss of air (may be termed air-to close).
Ferrule
A bushing used to secure a tube joint. A special bushing designed for welding to the end of tubing.
Two ferrules and a gasket make a leak-proof connection when used with the complimentary clamps.
Fitting
A small part of an apparatus (may be detachable).
Flooded Suction
When the liquid source is higher than the pump and the liquid flows to the pump by gravity. Preferable
for centrifugal pump installations.
Glossary of Terms
Y