Place of Origin: Hebei, China (Mainland) Brand Name: RENCHUN Model Number: HWJ850 Usage: Liquid Filter Type: Filter Cylinder Material: stainless steel or carbon steel Hole Shape: wedge Filter Rating: 99% Thickness: Customize Size Length: 3000~4000mm Width: Customize Size Tube Diameter: 200~850mm Welding Transfer Power: 200KVA Welding Speed: 6~20rpm Clearance of Slot: 0.15~16mm Precision of Slot: within 0.03mm Characteristics of Johnson Screens made by Welded Johnson Screen Machine: Easy Clearing The narrowest part of the aperture comes at the top and the steady opening out from that point promotes easy clearing. Lateral Strength Increases rapidly with the width of the profile and sufficient is needed to avoid the likelihood of the Wedge Wires being bent sideways and the accuracy of the slot being thereby lost. Load Carrying Capacity or Vertical Strength Increases rapidly with the depth of the profile and is needed to a greater degree than is lateral strength Percentage Open Area For any given aperture size this depends on the number of apertures per foot width of Johnson screen. The wider the profile the fewer the apertures, and the less is open area - likewise the smaller the number of pressed Wedge Wires per foot, the greater the open area. Wearing Life With abrasive materials the top surface of the profile becomes worn away and inevitably the aperture must increase. With a small angle of opening the increase is gradual, but with a large angle it is rapid. The apertures quickly reach the oversize limit and the working life is reduced.