Local Instrument Racks (lir)
Description
In any process activity involving the measurement of process variables like pressure, flow and level of gas, steam or fluid and temperature of static and dynamic elements, transmitters are used. These measurements are extremely critical for satisfactory and trouble free operation of a plant. The transmitter converts these physical parameters to electrical signals which are further fed into the plant DA S or DM. Since the transmitters are housed in the fields near the source of origin of signal, special provision for their mounting has to be provided. As per the field location, the transmitters and related equipment may be housed in racks or in enclosures.
Enclosures are cubicles which, besides providing proper support for mounting of local instruments, provide protection against ingress of dust and water. These are put in places where the presence of moisture and impurities may impede the proper functioning of the equipment On the other hand, racks are free standing structures for supporting local instruments. These are placed at locations where the atmosphere is clean and free from impurities.
Local Instrument Enclosure (lie)
Description
The Local Instrument Enclosure is a robust protective housing designed to ensure the safe and reliable operation of field-mounted instruments in demanding industrial environments. It shields critical devices such as pressure transmitters, flowmeters, temperature sensors, analyzers, gauges, switches, and junction boxes from adverse conditions including dust, moisture, extreme temperatures, vibration, and chemical exposure.
Constructed from high-grade stainless steel, aluminum, or powder-coated mild steel, the enclosure provides superior corrosion resistance and long service life in process plants, refineries, power stations, and outdoor installations. Its weatherproof and IP-rated design ensures complete environmental sealing, while optional thermal insulation, sunshields, heaters, or cooling arrangements protect instruments from thermal stress.
The enclosure is engineered for easy access with hinged or removable doors, allowing safe and convenient maintenance, calibration, or inspection activities. Cable entry glands, mounting brackets, and customized cutouts can be provided to suit specific project or instrument requirements.
Local Instrument Enclosures form a vital part of SWAS systems, analyzer panels, and field instrumentation loops, enhancing reliability, reducing maintenance downtime, and ensuring compliance with safety standards in harsh operating conditions.