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Dixon Sanitary 2014
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Technical
Centistoke
The kinematic unit of viscosity. Viscosity in centipoise divided by the liquid density at the same temperature
gives kinematic viscosity in centistokes.
Centrifugal Pump
Moves liquid with centrifugal force.
Ceramic
A hard, chemically inert seal face material that has very high compressive resistance.
Clamp
A device used to join mechanical parts, fittings, ensuring a quick leak-proof connection and enabling easy tear down.
Clean-In-Place (CIP)
internally cleaning a piece of equipment without relocation or disassembly. The equipment is
cleaned but not necessarily sterilized. The cleaning is normally done by acid, caustic or a combination of both with water-for-
injection (WFI) rinse.
Close Coupled
The pump impeller is mounted directly to the motor shaft or stub shaft that is mounted directly on the motor
shaft. There is no separate bearing case.
Cold Flow
Continued deformation or movement of rubber or PTFE under stress.
Compression Set
The deformation that remains in rubber or PTFE after it has been subjected to and released from stress
such as a clamp. The longer the stress is maintained the more definitive the deformation.
Controlled Sulfur
in weld ends of 316L materials used in BPE installations, the sulfur content must be between .005%
and .017% to assure better orbital welding.
Corrosion
a chemical or electrochemical interaction between a metal and its environment, which results in changes in the
property of the metal. This may lead to impairment of the function of the metal, the environment and/or the technical system
involved.
Cycle
See Hertz
DC
Direct current. The movement of electrical charge is only in one direction.
DPDT
Double pole-double throw, a type of limit switch.
Dead Head
The condition of a centrifugal pump running with a closed discharge line.
Dilatent Fluid
Viscosity increases with shear.
Discharge Head
The outlet pressure of a pump.
Double-Acting (DA) Pneumatic Actuator
Any pneumatic actuator which uses air to drive the actuator output
shaft in both the open and close direction. The air supply is piped to one side of a piston-drive or a diaphragm while the air
contained on the opposing side is exhausted.
Dry Running
Occurs when a pump is running with insufficient or no fluid in the pump.
Durometer
An instrument for measuring the hardness of rubber by resistance to penetration.
Glossary of Terms
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