FCI FLT93C Thermal Flow Switch

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With its stainless steel wetted materials and standard 20Ra finish, available in either mechanical polish or electro-polish finishing, the sanitary FLT93C Thermal Flow Switch supports both skid-mount and stationary clean-in-place (CIP) systems. The primary purpose of these systems is to ensure all process piping and equipment is thoroughly cleaned per ASME BPE standards.

The flow switch monitors the process cleaning solution’s minimum liquid flow rate to ensure it is maintained during the entire cleaning process runtime. Operating over a wide liquid flow range of 0.003 to 0.9 mps, it has accuracy of ±0.5% reading or ±0.012 mps.

Designed with unique temperature compensation technology, the flow switch ensures set point accuracy for process temperatures that can vary up to ±37.8°C. It is easily field-configured or factory preset, providing flexibility, accuracy and stability for all multiple process sensing and switching requirements.

Suitable for 19.05 to 101.6 mm sanitary tubing process lines, it connects with a secure tri-clamp fitting for easy removal for inspection and servicing. The 316 L stainless steel wetted materials are available in both mechanical polish (SF0 to SF3), and electro-polish (SF5 and SF6) surface finishes with 20 Ra maximum (µin) finish; 10 Ra maximum (µin) electro-polish finish (SF 4) is available on request. The construction complies with ASME BPE requirements.

In addition to CIP systems, other pharmaceutical uses include compendial water systems (WFI, PW and HPW) and solution preparation systems (buffer solution). Special options are available for applications requiring more corrosion-resistant, wetted materials such as Hastelloy C and Class 1, Div 1 and 2 hazardous areas.

The dual-function instrument indicates both flow and temperature and/or level sensing in a single device. Dual 6 A relay outputs are standard and are independently configurable to flow, level or temperature. The sensor technology of the series, combined with FlexSwitch temperature-compensation circuitry, introduces liquid level resolution of ±2.5 mm; repeatability of ±1.3 mm.

It also features a standard temperature accuracy ±1°C; repeatability is ±0.6˚C; improved temperature accuracy is available with factory calibration.

FCI’s FlexSwitch technology can be packaged in integral or remote configurations for installation flexibility.

The unit is available with a choice of sensors, including one that is suitable for process temperatures up to 176.67°C and one that is suitable for temperatures up to 260°C. Hazardous approvals include ATEX and EAC/TRCU.