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Thermal Structures has nearly 250 materials, mostly ceramic-based in its system. Outer covers are mostly 300 series stainless, with an increasing interest in both Inconel for higher temperature applications and aluminum for lower temperature uses."Sometimes there is a preconceived notion that the metal cover is the blanket," Buckett said. "The real key is the insulation under the metal cover. The idea, if we''re in the loop early enough, is to select the right materials and develop a noise or heat blanket for the specific application."

The drain fitting at the bottom of the tank normally has a shut-off valve to stop fuel flow during servicing of the fuel system. Sometimes the valve contains a sediment bowl to trap particulates and water. This sediment bowl should be checked and emptied often.* Fuel Lines -- Fuel lines are usually metal tubing or flexible hose that connect the tank to the filters, transfer pump, and injection pump. They are normally trouble-free, but problems can occur if the tubing or hoses become bent or kinked. In addition, sometimes the internal layer of rubber in the fuel hoses will collapse and reduce or stop fuel flow. Fuel Overflow or Return Lines -- These lines return diesel fuel either to the fuel tank or to the inlet side of a fuel filter. Some manufacturers pass fuel through the nozzles to absorb heat. When nozzles get too hot, fuel can start burning in the nozzles and deposit carbon on the needle and seat, causing the nozzles to fail.

Though light in weight, Airbor magnetic drill has a powerful 1.6-hp air motor and 1,600-lb magnetic holding strength. With its extra rack, stroke length is extended to 10 1/4 in. Annular cutter capacity is up to 2 1/16 in. diam. Geared chuck adapter converts the unit to a standard drill press. The Slugger Air Force pneumatic drill, at 24 lbs, 6 1/4" high, is useful for confined area drilling. The drill''s features include a permanent magnet that turns on or off by air power, a cutter capacity of up to 1 1/16" diameter x 3/4" depth and the ability to use ShortSlugger cutters and frame cutters. These cutters'' geometry allows the operator to drill multi-layered truck frames in a single pass.

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