Cryogenic cooling. (Equipment).

This cryogenic cooling system is said to provide more efficient and environmentally-friendly cooling of rubber and wire and cable products. Ideal for elastomer profiles, hoses, weatherstrip and insulated wire and cable applications, the system eliminates contamination caused by water immersion or spray systems by utilizing gasified liquid nitrogen as the cooling source, according to the company. This patent pending apparatus is said to be the first commercially available system of its kind. The cryogenic cooling system is said to offer the advantages of reduced floor space requirements, faster cooling resulting from significantly higher heat transfer coefficients, a moisture-free cooling environment and modular design. The cryogenic cooling system is designed with double-walled stainless steel to insulate and maintain temperature stability, and is capable of cooling products up to 4" (100 mm) in diameter. The nitrogen is injected into the chamber and allowed to flash to a gas and mix with air. A high velocity blower circulates the air at subsonic speed, providing a wind chill factor effect resulting in exceptional heat transfer rates, according to the company. Products can enter the chamber at 400 [degrees] F and exit at 75 [degrees] F with only seconds of residence time. Venting of the air nitrogen gas coolant can be piped outside the production area or to other cooling needs. The system features adjustable temperature set points, variable air velocity, air inlets with baffles and shut-offs from an operator control station. The unit can operate at high velocity levels between -200 [degrees] F and 500 [degrees] F and may also be used for drying, warming or curing applications. (Davis-Standard, 1 Extrusion Dr., Pawcatuck, CT 06379-2313)

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