All welded stainless steel filter cartridges are widely used in applications where non-metallic filter cartridges can not work well. They can be high pressure, high temperature, severe corrosive chemical environmental, static electric sensitive, or reusable and washable needed working conditions.
The structure of all welded stainless steel filter element is without any glue or adhesive, thus there is no mechanical limitation caused by the adhesive. All the joint, connection is made by welding, such as TIG, plasma welding or resistant welding ( spot or roll welding).
One special method is merging two filter media of the media and the hard ware by sintering process. This method will give uniform property at all the merging / connecting point.
Applications of all welded stainless steel filter cartridges:
- chemical processing,
- pharmaceutical processing,
- food & beverage,
- steam filtration,
- hot gas / air filtration,
- dedusting,
- polymer filtration,
- catalyst recovery,
- vacuum conveying,
- cryogenic filter, etc.
Filter media of SS all welded filter cartridges:
- stainless steel wire mesh,
Wire mesh filter basket
- stainless steel sintered metal powder,
- stainless steel sintered metal fiber,
and
- stainless steel perforated metal.
All welded cartridges types are mainly divided as pleated and cylindrical. Check this blog for the comparison.
Standard flow direction is from outside to inside. The max differential pressure is 10 bar. Backwash and reverse flow max differential pressure is 3 bar.
*Differential pressure may differ as filter cartridge structure varies.
Filter rating & material of all welded stainless steel filter cartridges
Filter rating range of the all welded SS filter cartridges is determined by the corresponding filter media.
Typical ratings are 0.5 1 2 5 10 15 20 25 30 40 50 100 150 20 microns.
SS 304, 304L, 316 and 316L are the mostly used material for stainless cartridges.
While 310S (for high temperature), 904L (for high corrosion resistant) and Duplex 2205 / 2507 (higher strength and corrosion resistance) stainless steel are also applied in some demanding applications.
Other metal materials ( titanium, nickel based alloy, copper alloy, etc) can also be used for filter cartridges if stainless steel is still not satisfactory.
We have years of experience handling the welding of these metal materials and filter media. And we are willing to explore new materials on your request.