Allen-Bradley Guardmaster is launching a stainless steel version of its Lifeline 4 cable-pull emergency stop switch for industries where hygiene and/or corrosion resistance are essential requirements.
Allen-Bradley Guardmaster is launching a stainless steel version of its Lifeline 4 cable-pull emergency stop switch for industries where hygiene and/or corrosion resistance are essential requirements.
With a 316 grade stainless steel body, this model of Lifeline4 is suitable for both internal and external use, providing users with constant emergency stop access along exposed conveyors and around awkward machinery. The stainless steel Lifeline4 is claimed to be a unique product that meets a known market need: it is said to be the only investment cast stainless steel cable pull switch of its type for use in harsh environments.
The new product takes the proven technology of the standard Lifeline4 and extends it into hygiene-conscious industries, such as food and beverage, and also those such as quarrying and mining, paper production and automotive, where corrosion can be a major problem. In all of these industries the ability of the stainless steel Lifeline4 to deliver robust, reliable and
cost-effective emergency stop provision is a factor not only in improved safety, but also in achieving more continuous production through reductions in unscheduled downtime; this being the result of solving problems due to corroded cable-pull switches.
Offered with the benefits of IP66 protection for hose-downs, and IP67 for full immersion, the stainless steel Lifeline4 is designed to address the problems of continuous operation in demanding environments. The robust, 316 investment cast body is unpainted, which prevents contamination in industries such as food processing. Similarly, the markings on the lid and on the side of the product are laser etched to ensure that they cannot flake off. In addition, the seal between the lid and the body of the switch protrudes slightly, so that it is not a food trap; and the pads on the base of the stainless steel Lifeline4 have been built up, allowing washdown water to flow behind the switch more easily.
Complementing these external design features is a positive-mode operating mechanism that delivers positive, immediate-latched operation in response to a definite deflection, at the same time protecting against the effects of nuisance tripping and thermal expansion. The positive-mode operation is one of several features that make the Lifeline4 a versatile cable-operated safety switch.
In addition to its integrated cable status indicator and four sets of contacts (two normally-closed and two normally-open), the stainless steel Lifeline 4 also includes a switch lockout and a lid-mounted, mushroom-headed emergency stop button that conforms to the requirements of EN418 and provides an emergency-stop facility even at the extreme ends of the cable span.
For more information, visit www.ejaltd.com
