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Dixon Sanitary 2014
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Technical
Hygienic Clamp Joint
a tube outside diameter union consisting of two neutered ferrules having flat faces with a
concentric groove and mating gasket that is secured with a clamp, providing a non-protruding, recessless product contact
surface.
ISO 5211
International standard for actuator and valve interface
Impeller
A rotor or rotor blade attached to the end of the stub shaft imparting energy from the motor to the fluid being pumped
Internal Expansion
(
IX) A method using a stem and a ferrule to assemble ends on a hose. Upon assembly of the parts,
a plug, sometimes known as a bullet, or a set of blades (fingers) is used to expand the stem diameter to a new larger size where
the serrations on the stem are forced into the hose and this, in turn, forces the hose cover into the serrations of the ferrule. This
provides a permanent assembly.
Kinetic Energy
Created by a centrifugal pump when the velocity of the fluid is accelerated to the outer rim of the impeller.
The amount of kinetic energy given to the fluid corresponds to the velocity at the impeller vane tip. The faster the impeller
revolves or the bigger the impeller, the greater the energy given to the fluid. This kinetic energy is then harnessed and slowed by
the resistance created by the pump volute.
Laminar Flow
Sometimes known as streamline flow, occurs when a fluid flows in parallel layers, with no disruption between
the layers. In fluid dynamics, laminar flow is a flow regime characterized by high momentum diffusion and low momentum
convection. It is the opposite of turbulent flow. In nonscientific terms laminar flow is "smooth", while turbulent flow is "rough."
Laminar flow is common in viscous fluids, especially those moving at low velocities.
Lubricant
Any fluid that will maintain a film thickness of one micron or more at its operating temperature and load.
Machine Welding
welding with equipment that performs the welding operation under the
constant observation and control of a welding operator. The equipment may or may not perform the loading and unloading of the
works. (see also automatic welding).
Manual Override
Any mechanical device by which an automated valve may be manually operated. On smaller actuators,
this may simply be wrench flats on the output shaft of the actuator. Larger actuators may require a more sophisticated system,
such as de-clutchable hand wheels, manual gears, jack screws or hydraulic hand pump over-ride.
Manual Welding
welding in which the entire welding operation is performed and controlled by hand.
Maximum-Shut-Off Pressure
(
Delta-P) The pressure of the media flowing into the valve against which the valve will
have to close.
Meandering
of or pertaining to a weld bead that deviates from side to side across the weld joint rather than tracking the joint
precisely. Note the controlled sulfur content in BPE weld material.
Mechanical Seal
A positive sealing device used to seal all fluids. Consists of two basic parts, a rotating element attached
to the pump shaft and a stationary element attached to the pump casing. Each of these elements has a highly polished sealing
surface. The polished faces of the rotating and stationary elements come into contact with each other to form a seal that
prevents leakage along the shaft.
Media
The material flowing through the valve.
Glossary of Terms
Y