Durable woven mesh filtration media for heavy duty applications

Replacement of sensitive, low-grade filter components is common place. The automatic self-cleaning filters are used in upstream of UV disinfection systems. High grade alloys are used in saline lake beds, shipboard reverse osmosis desalination, plant desalination, and designed water applications to minimize replacement components due to corrosion, to enhance sustainability and decrease maintenance and labor costs.

Applications

·         Petrochemical

·         HVAC

·         Metal works

·         Seawater

·         Water-car wash

·         Food processing

·         UF pre-filtration

·         Membrane safety

·         Drinking water

·         Wastewater

·         Recycled water and reuse

·         Desalination

·         Golf- turf

·         Agriculture

·         Greenhouse

·         Nursery

100% of particles removed above the degree of filtration, even one can also receive a significant particle reduction of 25 to 50% in 5 to 50 micron size due to the filter cake effect. The filter cake effect simply shows the fact that degree of filtration becomes finers as a screen accumulates dirt. It explains 25% reduction in particles at 5 to 15 range.

Advantages

·         Automatic backwash

·         No need to replace cartridges

·         Less system downtime

·         Less time used on regular maintenance

·         Nominal water used for backwash

·         Durable stainless steel design

·         Predictable solid filtration barrier

·         Does not need a minimum velocity

·         Removes solids, irrespective of density

·         Static filtration barrier

·         Higher flow rates

·         Robust MOC

Custom automatic self-cleaning water filter for shipboard reverse osmosis desalination, the custom fabricated sintered wire mesh filter screens are developed using duplex stainless steel to withstand corrosive seawater conditions.

Advanced automatic self-cleaning filters used in the reverse osmosis desalination system, conventional solid-liquid separation technologies in various aspects including decreased service costs. The level of pre-filtration allows continuous operation without any reduction in system performance or increase in service costs or maintenance.

Surface finishes and processes

·         Mill finishes

·         Mechanical smoothing

·         Sandblasting

·         Beadblasting

·         Electropolishing

·         Chemical vapour deposit

·         Hydrogen annealing

Second generation of duplex steels was developed with enhanced welding properties through nitrogen alloying. Common duplex grade is 2205 that has a nominal composition of 22% chromium, 5% Nickel, 3% Molybdenum and 0.16% Nitrogen. The steel is used in varied applications in a wide range of product forms. Various grades have become popular for their chromium and nickel concentrations. Alloy 2205 is a nitrogen improved duplex stainless steel grade. Nitrogen significantly improves the corrosion resistance properties that also include a yield strength that is more than double of conventional austenitic stainless steels particularly in the welded condition.

Earlier duplex grades had medium resistance to general corrosion and chloride stress corrosion cracking, however experienced a major loss of properties when used in the as-welded condition. Duplex 2205 stainless steel offers corrosion resistance in various conditions that is better than SS 304, 316 and 317 austenitic stainless steels. The duplex stainless steel is usually used in the form of welded pipe or tubular components and formed sheet product and welded sheet product in conditions where resistance to general corrosion and stress corrosion cracking is crucial. High strength develops opportunities for reduction in tube wall thickness and prevents damage.