Fully automatic self cleaning strainers use an a motorised basket to ensure that the basket surface is
swept clean and/or backflushed to ensure continuous operation and minimum maintenance. Control of the
backwash cycle is by a differential pressure switch with the option of a timer over-ride, thereby ensuring that the basket is cleaned within a minimum timed frequency. The larger self cleaning
strainers normally need prescreening to a minimum of 12 mm, whilst the smaller and lighter units which
are designed for mains water filtration do not require any form of prefiltration.
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T304 is the basic stainless alloy, and unless otherwise specified it is assumed that this type is acceptable. Also called 18-8 due to 18% chromium and 8% nickel. T304 melts at 2600 degrees F (1430 C) but its maximum recommended temperature for continuous service is 1450 degrees F. (790 C) and is useful for intermediate service up to 1650 degrees F (900 C). Its' uses include: sorting and screening of abrasives, liquids, powders and other solids. It is the less expensive alloy but not as corrosion resistant as T316. It is the slightly stronger of the two types.
Type 316 is a special stainless alloy due to the addition of 2% molybdenum. This increases its resistance to corrosion by salts, acids and seawater. Also called 18-10 due to 18% chromium and 10% nickel. T316 melts at 2500 degrees F (1375 C) but its maximum recommended temperature for continuous service is 1500 degrees F. (815 C) and is useful for intermediate service up to 1650 degrees F (900 C). Its' uses include: processing of oils and foods, chemicals, and pharmaceuticals.