Table of Contents
Page 10 of 62 User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Term Description
OSI model
Open Systems Interconnection model. The model is a conceptual model that
standardizes communication systems without regard to the underlying internal
structure. The model partitions a communication system into abstraction layers.
Out of range Definition of position. The outgoing shaft is outside the defined position area.
PF Power factor
PCB Printed circuit board.
PLC
A Programmable Logic Controller is a digital computer used for automation of
industrial processes, such as control of machinery on factory assembly lines,
measurement and control of process plants etc.
RSW Refridgerated sea water system
SDoC Supplier Declaration of Conformity.
SOLAS
Safety Of Life At Sea – conversion under IMO concerning safety for personnel and
ships at sea
VA Voltampere
UPS Uninterruptable power supply.
Valve
A valve is a device that controls the flow of materials (gases, fluidized solids,
slurries, or liquids) by opening, closing, or partially obstructing various
passageways.
This manual refers to quarter-turn valves with a 90 degrees movement between
Closed and Open position.
Valve actuator A device for control of valves in various process control systems.
Valve top
flange
The flange on top of the valve which integrates the actuator. Key parameters to
be aware of are summarized in 3.3 Technical specification on page 17.
As an example, most butterfly valves comprise four screw holes for the flange
integration and a square stem for valve operation.
Within range Definition of position. The outgoing shaft is within the defined position area.
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