Maximum Working Pressure: 10.5 kgs/cm² (150 psi.) Of the models listed only the Model 93C has an ASME Code pressure vessel, with a stamp indicating compliance with Division VIII, Section 1 of the Code. (Separators designed for higher working pressures and temperatures with ASME Code Division VIII, Section 1 pressure vessels are also available.).

Magnetic Field intensity, field gradient and energy gradient. The F1 Series is designed for maximum economy consistent with effective separation of fine ferromagnetic particles.

Background magnetizing fields measured in the empty separating chamber (with pole pieces but without the matrix in place) are approximately 1000 Oersteds. With the matrix in place the background field increases substantially.

The background field induces a field several times more intense in the collecting elements. A high field gradient is provided at the collecting edges; the dimensions and orientation of the elements are essential to these high gradients.

Energy gradient (HdH/dX) at the collecting edges of a standard matrix element fabricated of steel ribbon 1/4" in width and 0.02" thick is calculated as 2.5 x 10¹¹ Gauss²/cm, assuming that the field induced in the steel near the edge is about 5000 Gauss, as measurements indicate.

Materials of construction: Metallic product-contact parts are types 303 and 304 stainless steel with the exception of those that carry magnetic flux. Most of those parts are type 430 stainless steel, which is highly ferromagnetic.

Standard matrix elements ("grids") are nickel-brazed. Spiders (removable pole pieces at either end of matrix) – may also be made of hot rolled carbon steel, nickel-braze coated for corrosion resistance.

Matrices: Standard grids are fabricated by winding in spiral form two ribbons of type 430 stainless steel, one crimped to provide uniform openings and one flat. Nickel brazing provides rigidity. The matrix supplied for a particular application is composed of grids selected for ribbon dimensions and size of openings suitable for the material to be processed.

Spiders are removable pole pieces made of type 430 stainless steel. Heavy, solid discs with evenly spaced openings, they serve to conduct and distribute magnetic flux. One spider is placed at each end of a stack of grids.

Matrices made of stainless steel wool are available for magnetic filtration of low-viscosity liquids and vapors containing no particles larger than 50 microns.

Matrices composed of sheets of expanded type 430 stainless steel formed to simulate the ribbon-wound grids are also available. Expanded metal sheets are less rigid and durable than standard grids.