Overflow Level Protection, Acid
Refinery, Gallup, New Mexico, USA
Kayden CLASSIC 800 Series Thermal Dispersion Flow, Level, Interface & Temperature Switch & Transmitter
Reliable and repeatable level control is critical in order to prevent contamination of the process upstream or downstream. The acid must not be allowed to flow into the process except when required as a chemical additive.
Prior to Kayden, the customer tried a competitor’s thermal switch and a gap switch in this application. Kayden was chosen and has succeeded where the other instruments failed:
For a level switch to perform well in this application it must resist failures caused by:
The Kayden CLASSIC 800 Series Thermal Dispersion Flow, Level, Interface Temperature Switch is used to provide the critical control for acid additive level. The switch is set to activate or deactivate the feed valve, either directly or as is done in this case through a master control system, using either of the independent relay contacts or the 4-20mA analog output.
Although often overlooked in level applications in favor of more complicated and expensive technologies, Kayden thermal dispersion switches provide digital repeatability and fast response in a rugged package that is not bothered by coating on the probe and will not drift, seize, or ever require calibration.
Easy, Display Panel controls and display make set-up fast and easy. Unlike float, paddle or gap switches Kayden switches feature all-welded sensors, no-moving-parts design, true digital electronics with autodiagnostic functions, two independent relay timers, a Bypass Timer for auto pump restart, simultaneous process temperature monitor and a 4-20mA analog output corresponding to the process level (flow).
Display Panel Indicators:
On steady when Relay 1 is energized
On steady when Relay 2 is energized
Indicates a self-test error or fault condition
Set Point 1
On steady when viewing Set Point 1
Set Point 2
On steady when viewing Set Point 2
Flashing when switch is operating
Flashing when the Start-up Bypass Timer is active
Displays Thermal Signal
The Thermal Signal increases as:
The flow rate increases
The sensor is submerged
The sensor is submerged by the second liquid of greater thermal conductivity
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