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The construction technique delivers an excellent thermal conductivity or ‘k’ value rating of ~1.5W/m2K. This provides a highly efficient solution for protecting against frost and condensation and/or providing regulated temperature environments for sensitive field instrumentation – one that offers a quick payback from energy savings compared with many common types of metal enclosures.
As standard, the BASIC VARIO range provides a rectangular-shaped enclosure in a choice of three standard sizes of 105×64,105×84 or 105×104 cm (41.3×25.2, 41.3×33.1 or 41.3×40.9 inches) – with a depth of 35 cm (13.8 inches). These deliver a range of volumes that sit between the typical upper limits of many field instrument enclosure ranges and the smaller sizes of many outdoor cabinets. The volumes are large enough to accommodate several field process transmitters for example, sophisticated analytical instrumentation points, or complex electrical circuitry designs. The construction principles of BASIC VARIO also mean that Intertec is able to provide custom sizes easily.
The enclosures meet the IP65 ingress protection standard – with Type 4X approval pending – and are fitted with a large hinged door (with or without windows) that provides easy access to the interior space. Tube and cable entry is very flexible and can be made through the rear or any of the four sides. Unlike many other competitive products, Intertec’s new field enclosures have flat exterior surfaces and are also free of any overhanging edges, allowing enclosures to be packed side by side or on top of each other – in situations where space is restricted.
The insulated sandwich construction technique that Intertec uses on BASIC VARIO – and almost all of its other enclosures and cabinets – provides superb insulating properties. Insulation efficiency is typically several times more efficient than an enclosure made using single-layer polyester for instance, and substantially better than a case made of sheet metal – two common types of alternative products on the market. BASIC VARIO’s superb thermal resistance is further enhanced by unique accessories available from Intertec, such as hard foam mouldings that may be drilled to accept tubing to minimise the ‘thermal short-cut’ effects of the access holes that invariably have to be made. The thick sandwich construction material used for the walls also has the benefit of allowing lightweight equipment to be mounted directly onto it – avoiding the need for mounting rails in some instances.
The long fibre reinforced grades of GRP sheeting employed by Intertec provides great structural strength that almost matches stainless steel – for just a quarter of the weight. This allows BASIC VARIO enclosures to accept very high equipment loads. The enclosure surfaces are also highly resistant to weather and the corrosive effects of aggressive chemicals. This makes BASIC VARIO enclosures ideal for applications in chemical, oil and gas plants.