Plant engineers and maintenance staff responsible for ensuring the reliable operation of positive air flow pressure and exhaust ventilation systems will find the FLT93F Flow Switch from Fluid Components International (FCI) provides them a highly sensitive and reliable solution to monitor and alarm if their system is degrading, not operating to specifications, or has shut down.
Positive air flow pressure and exhaust ventilation systems are designed to ensure contaminants are continuously prevented from entering an area or are removed from an area to maintain a safe, healthy closed environment. These systems are found in a wide range of settings such as clean rooms, research laboratories and production environments, as well as analyser houses and sheltered areas. Many industries make use of these systems, including the pharmaceutical, biotech and medical industries, as well as chemical plants, refineries and power plants.
These specialised environmental air systems use fans to maintain a higher than ambient air pressure environment inside a designated area to ensure clean, contaminate-free air and/or strong exhaust fans to remove hazardous fumes. With its SIL 2 rating, the highly accurate and dependable FLT93F Flow Switch is ideal for use when these sensitive application environments are part of a safety instrumented system (SIS) requirement.
The FCI Model FLT93F Flow Switch is specifically designed for air and gas flow detection. It is both fast responding and capable of detecting even very slight changes in air flow. They are available in a variety of process connections for ease of installation in most any pipe, vent, or duct size. Its universal power supply supports powering by 115 VAC, 230VAC, or 24 VDC. Its trip-point/alarm points are easily user set in the field, at the installation. It comes standard with fail-safe, heavy-duty dual alarm (SPDT) or DPDT relay outputs, rated 6 amps at 115 Vac, 240 Vac or 24 Vdc.
The FLT93F Flow Switch’s flow sensor element is an all-welded design and constructed of premium 316L stainless steel. It has no moving parts to break or orifices to foul or clog, so there is no required routine maintenance needed. The flow switch instrument is available in a choice of rugged, all metal enclosures that are NEMA 4X/IP66 rated for long service life in the most demanding installations and environments. Electronics can be mounted integral with the flow element or remote mounted a distance away from hazardous areas.
For applications in potentially explosive dust or gas environments, the FLT93F is also suitable for installation in Div.1/Zone 1 areas and certified to local standards of FM, FMc, ATEX, IECEx, NEPSI, EAC, Inmetro, UKCA, and EQM/ECAS. It also meets the EC directives for EMC and LVD and the flow element complies with Canadian Electrical code requirements of ANSI/ISA 12.27.01-2011 as a single seal device.