New pumps are expensive, so engineers will appreciate how the FLT93 Series Flow Switch from FCI provides a reliable early warning alert to dry running conditions, cavitation, and other issues that can lead to emergency shutdowns, service interruptions and unplanned costly maintenance.
Many demanding process industries depend on pumps to move process fluids and keep cooling systems up and running. Pumps are expensive to operate and costly to maintain. This is particularly true when dry running conditions suddenly occur. It can be due to system variable demand, leaks, clogs or other problems that could affect a pump’s seals or bearings. The resulting damage can require expensive, time-consuming repairs, overhauls or replacement at an even higher cost.
The dual alarm FCI FLT93 Series Flow Switch reliably monitors the flow and temperature of liquids, gases, slurries and more. It is ideal for pump wet/dry detection. This is where sudden, unexpected reductions in media flow rates can leave pumps vulnerable to over-heating conditions that shut down process lines. It can require troubleshooting, fixes and more. This SIL-2-rated instrument is designed for heavy-duty, hazardous process industry environments. It comes with a comprehensive list of global safety approvals.
With no moving parts as part of the design, the FLT93 Switch offers a highly robust scheme for pump protection with its dual alarm capability. With Alarm 1, the switch will detect a low flow situation anywhere between 0,003 meters to 0,9 meters per second MPS. This low-flow alarm is a pre-warning signal for the control system or operator. The system or operator can then decide to keep the pump running or to shut it down.
Alerts from FCI flow switch support better maintenance
If Alarm 2 occurs because the feed line to the pump is running dry, this condition would be an emergency signal to shut down the pump immediately because the bearings now see gas instead of liquid as a heat transfer media. In such situations, the temperature of the bearings may rise very fast. Using a flow switch prevents permanent damage to the pump’s bearings that will require an overhaul of the pump before more damage occurs.
The sophisticated FLT93 switch is a dual-function instrument that indicates both flow and temperature. It can also work as a level sensor in a single device. Dual 6A relay outputs are standard and are assignable to flow, level or temperature. The FLT93 switch can be specified in either insertion or in-line styles for pipe or tube installation.
Designed for demanding heavy-duty processes, the 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 on the full instrument include FM, FMc, ATEX, IECEx, UKCA, CSA, CRN, and CE.
Highly dependable, FCI’s versatile FLT93 switches are ideal for applications in many demanding hazardous process industries. They are also used extensively with or without SIL2 certification in a wide variety of applications.
FCI is the only thermal manufacturer providing built-in temperature compensation to ensure set point accuracy for process temperatures that vary up to ±100°F. The FLT93 is easily field-configured, providing unparalleled flexibility, accuracy and stability for all multiple process sensing and switching requirements.
For further information, visit www.ams-ic.com.au
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