valutazioni - 2, GPA: 3.5
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The best time to clean is shortly after each use (allow unit to cool to a safe temperature). WARNINGS . Do not use detergents or cleansers that are chloride based or contain quaternary salt. Chloride Cleaners . Do not use a metal bristle brush or scraper. Wire Brush & . Steel wool should never be used for cleaning the stainless steel. Steel Pads . Unit should never be cleaned with a high pressure spray hose. High Pressure Spray Hose . Do not leave water sitting in unit when not in use. CLEANING INSTRUCTIONS 1. Turn unit off. 2. Prepare a warm water and mild detergent solution in the unit. 3. Remove food soil using a nylon brush. 4. Loosen food which is stuck by allowing it to soak at a low temperature setting. 5. Drain unit. 6. Rinse interior thoroughly. NOTES . For more difficult cleaning applications one of the following can be used: alcohol, baking soda, vinegar, or a solution of ammonia in water. . Leave the cover off when the unit is not in use. . For more detailed instructions refer to the Nafem Stainless Steel Equipment Care and Cleaning manual Stagnant Water STAINLESS STEEL EQUIPMENT CARE AND CLEANING (Supplied courtesy of Nafem. For more information visit their web site at Contrary to popular belief, stainless steels ARE susceptible to rusting. Corrosion on metals is everywhere. It is recognized quickly on iron and steel as unsightly yellow/orange rust. Such metals are called “active” because they actively corrode in a natural environment when their atoms combine with oxygen to form rust. Stainless steels are passive metals because they contain other metals, like chromium, nickel and manganese that stabilize the atoms. 400 series stainless steels are called ferritic, contain chromium, and are magnetic; 300 series stainless steels are called austenitic, contain chromium and nickel; and 200 series stainless, also austenitic, contains manganese, nitrogen and carbon. Austenitic types of stainless are not magnetic, and generally provide greater resistance to corrosion than ferritic types. With 12-30 percent chromium, an invisible passive film covers the steel’s surface acting as a shield against corrosion. As long as the film is intact and not broken or contaminated, the metal is passive and stain-less. If the passive film of stainless steel has been broken, equipment starts to corrode. At its end, it rusts. Enemies of Stainless Steel There are three basic things which can break down stainless steel’s passivity layer and allow corrosion to occur. 1. Mechanical abrasion 2. Deposits and water 3. Chlorides Mechanical abrasion means those things that will scratch a steel surface. Steel pads, wire brushes and scrapers are prime examples. Water comes out of the faucet in varying degrees of hardness. Depending on what part of the country you live in, you may have hard or soft water. Hard water may leave spots, and when heated leave deposits behind that if left to sit, will break down the passive layer and rust stainless steel. Other deposits from food preparation and service must be properly removed. Chlorides are found nearly everywhere. They are in water, food and table salt. One of the worst chloride perpetrators can come from household and industrial cleaners. So what does all this mean? Don’t Despair! Here are a few steps that can help prevent stainless steel rust. 1. Use the proper tools. When cleaning stainless steel products, use non-abrasive tools. Soft cloths and plastic scouring pads will not harm steel’s passive layer. Stainless steel pads also can be used but the scrubbing motion must be in the direction of the manufacturers’ polishing marks. 2. Clean with the polish lines. Some stainless steel comes with visible polishing lines or “grain.” When visible lines are present, always scrub in a motion parallel to the lines. When the grain cannot be seen, play it safe and use a soft cloth or plastic scouring pad. 3. Use alkaline, alkaline chlorinated or non-chloride containing cleaners. While many traditional cleaners are loaded with chlorides, the industry is providing an ever-increasing choice of non-chloride cleaners. If you are not sure of chloride content in the cleaner used, contact your cleaner supplier. If your present cleaner contains chlorides, ask your supplier if they have an alternative. Avoid cleaners containing quaternary salts; it 4. Treat your water. Though this is not always practical, softening hard water can do much to reduce deposits. There are certain filters that can be installed to remove distasteful and corrosive elements. To insure proper water treatment, call a treatment specialist. 5. Keep your food equipment clean. Use alkaline, alkaline chlorinated or non-chloride cleaners at recommended strength. Clean frequently to avoid build-up of hard, stubborn stains. If you boil water in stainless steel equipment, remember the single most likely cause of damage is chlorides in the water. Heating cleaners that contain chlorides hav...
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