Web Exclusive April 2006

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Coupling Ensures Secure Connection, Eliminates Need for Rethreading

Uncertainty about a connection can risk exposing workers to hazardous substances and can cause drips or spills. To avoid doubt, Colder Products Co. (CPC; St. Paul, MN) developed polypropylene couplings with a push-button latch that emits an audible click sound to indicate a secure connection.

Suited for such analytical-instrument applications as mass spectrometry, reagent lines, microplate washers, electrophoresis, pneumatic lines, and chromatography, the PMC12 line of quick-disconnect couplings is offered with ¼-28 UNF threads and a ¼-28 flat bottom port.

Following the initial installation of the microbore tubing with a nut and ferrule into the coupling, users can feel confident in the connection because of the click and the ability to "feel" the parts connect, according to CPC. The company asserts that these characteristics eliminate the uncertainty associated with using HPLC-style nuts and ferrules, which requires rethreading and tightening each time. One-hand connection and disconnection capabilities also act as time savers.

Equipped with an integrated shutoff valve, the coupling automatically contains fluid upon disconnection, ensuring safety and cleanliness. Constructed from polypropylene, the couplings are chemically resistant and gamma-sterlizeable. The product also allows tubing connections as small as 1 mm, operates within temperatures ranging from 32° to 160°F, and features an operating pressure range from vacuum to 120 psi.

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