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Outdoor Equipment Enclosures come in application-specific sizes.

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December 2, 2011 - Able to be specified to millimeter accuracy, Multibox Vario environmental protection enclosures accommodate size and form factor needs to precisely match instrumentation content and layout demands of instrumentation and control engineers' applications. Dimensions range from 100 x 100 x 100 mm with 20 mm thick walls to 2,000 x 1200 x 800 mm with 102 mm thick walls, and sandwich type construction is based on UV-resistant glass-fiber reinforced plastic skins and internal insulative foam core.

Outdoor Equipment Enclosures for Perfectionists: Application-Specific Sizes to Millimeter Accuracy Now Available


(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

INTERTEC Instrumentation Ltd
255 Henry Dr.
Sarnia, ON, N7T 7H5
USA



Press release date: November 24, 2011

  • CNC manufacturing plus energy-efficient construction slashes operating costs

  • non-metal construction provides wireless-friendly homes for new-generation plant instrumentation

    Sarnia, Ontario - A new range of insulated outdoor enclosures from field equipment protection specialist Intertec significantly extends users' choice of environmental protection solutions. The company's Multibox Vario enclosures are produced using an advanced patented CNC manufacturing process, capable of accommodating a wide variety of custom sized enclosures. This means that instead of having to select a standard size of enclosure, or commission a special hand-built model, instrumentation and control engineers are now free to specify the precise dimensions they need for their particular application.

    The advantages of this approach are considerable for field-based equipment operators in sectors such as oil, gas, chemical and petrochemical processing, power generation and transportation infrastructure. By optimizing the size and form factor of the enclosure to precisely match the instrumentation content and layout, engineers can minimize its surface area and thereby secure optimum thermal performance. Until now, due to lack of form factor options, they have often been forced to use an unnecessarily large standard enclosure or even a cabinet, leading to wasted space and excessive energy use for heating or cooling.

    Intertec's Multibox Vario enclosures can be specified to millimeter accuracy and cover an extremely wide range of potential sizes. These span dimensions from about 100 x 100 x 100 mm with 20 mm thick walls, through to models that are 2000 mm high, 1200 mm wide and 800 mm deep, with a wall thickness of 102 mm. This flexibility simplifies containment of awkwardly shaped components, such as process valves or analyzer equipment. It also allows the enclosures to be fitted in locations where there may not be enough space for standard sized units, contributing to ease of installation and maintenance access.

    The range of dimensions offered expands upon Intertec's existing enclosure sizes and also encompasses those of some of the company's smaller cabinets, enabling users to choose a more cost-effective and thermally efficient form of environmental protection.

    To help instrumentation engineers accelerate their design process, Intertec has developed a web-based configurator specifically for Multibox Vario enclosures. Backed by Autodesk Inventor 3D mechanical design software on Intertec's CAD server, the configurator is free to use and does not cause any software to be downloaded to the user's computer. It merely requires that the user has access to Intertec's website, via a standard web browser. After inputting the required enclosure dimensions, users are emailed a fully-dimensioned PDF schematic completely automatically, together with a STEP file and a DXF file for direct import into their 3D or 2D CAD system. They are then able to progress their design, optimizing internal layout to make best use of available space. The same data is subsequently used by Intertec to control the CNC manufacturing process, with production samples available within very short timescales.

    All Multibox Vario enclosures employ an energy efficient sandwich type construction, based on UV-resistant GRP (glass-fibre reinforced plastic) skins and an internal core of highly insulative foam. The internal and external GRP skins are 4 mm thick to provide a very high degree of rigidity. Depending on the particular model, the overall wall thickness with its insulation core is 20 mm, 55 mm, 85 mm or 102 mm. This type of construction has an exceptionally low heat transfer coefficient, or 'k' value, of just 1.2, 0.43, 0.27 or 0.2 W/mK respectively (corresponding to insulation, or R values, of 4.3, 13, 21 or 28 h ft F/Btu), which helps minimize heat loss or gain and thereby reduces the amount of energy required for heating or cooling. The enclosures are far more thermally efficient than types constructed from sheet metal with added insulation.

    One other major advantage of Intertec's non-metal GRP and foam construction materials is that the new enclosures provide a benign environment for housing the new generations of wireless-enabled field instrumentation that are starting to become popular - extending their applications potential in outdoor locations. Intertec enclosures don't cause any damping of electromagnetic signals.

    Multibox Vario enclosures are based on a two-part design with external hinges and clasps; the female half incorporates neoprene edge seals, which are compressed when the male half is clamped shut. The enclosures have an ingress protection rating of IP65 as standard, with IEC 60079 compliant versions available for use in hazardous atmospheres. Instrumentation is usually mounted on C-rails, although lightweight equipment can be secured direct to the internal walls, with tubes and electrical connections brought in via the bottom edge. The enclosures feature a wide range of options, including clasps, hinges and prop-stays in galvanized and stainless steel, acrylic and safety glass viewing windows, and free-standing and wall-mounting brackets.

    Compared to most cabinets, which necessarily incorporate features such as metal door frames that act as thermal short cuts between the interior and exterior, Multibox Vario enclosures provide a much more efficient and stable thermal environment, making it easier to maintain equipment at the correct temperature. The design avoids heat short cuts by using GRP as a construction material - this has a thermal conductivity which is 250 times lower than steel and 1000 times lower than aluminum. All access holes for tubes and cables can be plugged with hard foam molding accessories from Intertec.

    The form of GRP used for Multibox Vario enclosures, as with other Intertec field protection products, provides numerous advantages over traditional enclosure fabrication materials. Its strength virtually matches that of stainless steel, yet it weighs 75 percent less and is several orders of magnitude more stable than non-reinforced plastic. It is also fire resistant and inherently immune to salt spray and harsh corrosive media, making the enclosures ideal for applications in the offshore oil, petrochemical and gas industries.

    More information: www.intertec.info

    Contact details

    INTERTEC Instrumentation Ltd, 255 Henry Drive, Sarnia, Ontario N7T 7H5, Canada. t: 519-337-2773; info@intertec-inst.com

    INTERTEC Instrumentation Inc., PO Box 421891, 11116 West Little York, Building 1, Houston, Texas 77242-1891, USA. t : 832 243 0790; info@intertec-inst.com
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