The Sure Clamp Spiral is a clamp-together ductwork system that reduces installation costs, according to the manufacturer. The new connection is constructed using a precision-fabricated clamp with a neoprene sponge gasket. The company claims that with the Sure Clamp Spiral, complete systems can be installed with ease and taken apart and reassembled just as easily. The product is ideal for various applications, such as dust, fume and HVAC systems. Langdon fabricates ductwork to Sheet Metal and Air-Conditioning Contractors’ National Association construction standards, as well as specialty systems. Sure Clamp Spiral is available in galvanized, galvanneal, stainless steel and aluminum in even and odd sizes from 3 inches to 22 inches. Sure Clamp is also available in longitudinal seam ductwork.

Langdon Inc., 9865 Wayne Ave., Cincinnati, OH 45215; (513) 733-5955; fax (513) 733-8050;