| 摘要 |
PURPOSE:To prevent a filter area from being reduced due to the deformation of a corrugated filter body by molding the corrugated filter body into a cylinder form to obtain an element main body and allowing a reinforcing member to abut against the inner surface of the filter body and also to hold the element main body to the corrugated cylinder and equipping both this element main body and the reinforcing member to the element for filtration in a casing. CONSTITUTION:An element 13 for filtration is arranged into a casing 3 and water is passed to a secondary side from a primary side of the element 13 and purified. This element 13 is equipped with both an element main body 17 wherein a corrugated filter body is molded in a cylinder form and a reinforcing member 18 which is allowed to abut against the inner surface of the filter body and holds the element main body 17 to the corrugated cylinder. As a result, the element main body 17 to the corrugated cylinder. As a result, the element main body 17 can be held in a required shape and the filter area can be prevented from being reduced by the change in the shape of the element main body 7. Further when a precoat layer is formed, uniformity and continuity of the precoat layer can be drastically improved. |
