ZD Filtration is professional Witches Hat Strainer manufacturer and supplier. Witches hat strainer can be made from perforated plates and woven have a wide range of material types to suit our customers' different filtration applications. DEZE offer custom witches hat strainers. Depending on the direction of the water flow, stainless steel mesh can be added inside or outside the porous iner. It is used to remove particles from fluids in many applications including the oil and gas, chemical and rmaceutical industries.