New dual alarm flow switch providing pump protection

AMS Instrumentation and Calibration announces the release of a new flow
switch from Fluid Components International (FCI) designed to provide a reliable
early warning alert against potential pump problems in process industries.

Many process industries depend on pumps to move process fluids and keep
cooling systems up and running. Problems such as system variable demand, leaks
or clogs can cause dry running conditions, damaging the pump’s seals or
bearings, and resulting in expensive repair, overhauls or even full
replacement.

Engineers responsible for optimising the uptime of process flow networks
in chemical plants, electric power generation, food and beverage industries,
oil and gas as well as municipal water systems can use the new FLT93 flow
switch to get a reliable early warning alert to the potential of dry running
conditions, cavitation and other pump issues that can lead to emergency shutdowns,
service interruptions and unplanned costly maintenance.

Designed to monitor the flow and temperature of liquids, gases, slurries
and more, FCI’s dual alarm FLT93 flow switches are ideal for wet/dry detection
in pumps, where sudden, unexpected reductions in media flow rates can leave
pumps vulnerable to over-heating conditions that shut down process lines and
require troubleshooting and expensive repairs.

Featuring a no-moving parts design, the FLT93 flow switch offers robust
pump protection with its dual alarm capability.

With Alarm 1, the switch will detect a low flow situation anywhere
between 0.003 to 0.9 MPS (metres per second). This low flow alarm can be
regarded as a pre-warning signal for the control system or operator, who can
then decide to keep the pump running or shut it down.

Alarm 2 will be triggered when the feed line to the pump is running dry,
providing an alert to the operator to shut down the pump immediately because
the bearings now see gas instead of a liquid as a heat transfer media, causing the
temperature of the bearings to rise very fast. Using a flow switch prevents
permanent damage to the pump’s bearings that can otherwise require a complete overhaul
of the pump.

The advanced FLT93 flow switch is a dual-function instrument that
indicates flow and temperature, and/or level sensing in a single device. Dual
6A relay outputs are standard and assignable to flow, level or temperature. The
FLT93 switch can be specified in either insertion or inline styles for pipe or
tube installation.

The rugged FLT93 switch is hydrostatically proof pressure tested to 240
bar (g) at 21¡C. De-rated with temperature, the maximum operation service
recommended is 162 bar (g) at 260¡C. Higher ratings are available with special
construction and test certification. Agency approvals include FM, ATEX, CSA,
CRN and CE.

FCI’s versatile FLT93 flow switches are ideal for applications in
demanding hazardous process industries, and also used extensively with or
without SIL2 certification in a wide variety of applications in the food and beverage,
mining and milling, pulp and paper, pharmaceutical, and water and wastewater
treatment among many more.

For further information, please visit the AMS Instrumentation and
Calibration www.ams-ic.com.au or call 03-9017
8225, or Freecall (NZ) 0800 442 743.

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