Patent ID: 7172697
Filing Date: 2007-02-06
Classification: B01D,Y02A

Abstract:
1. A seal ring holder for membrane elements which is disposed at an end part of a spiral wound membrane element to hold a seal ring on the outer periphery thereof while allowing a raw liquid to flow into a membrane end part of the membrane element, the seal ring holder comprising: a first ring part which has a side wall facing an upstream-side membrane end part of the membrane element and is inserted into an end part of a sheathing member of the membrane element; a projecting ring part which is formed upstream from the first ring part and has side walls respectively on both sides, an edge face of the sheathing member and the downstream-side edge face of the seal ring being fixable respectively to the side walls; a second ring part which is formed upstream from the projecting ring part and to the outer periphery of the second ring part the seal ring is fitted; and a third ring part which has been formed upstream from the second ring part and to the third ring part the upstream-side end face of the seal ring is fixable, wherein a plurality of peripheral groove parts on which height of a peripheral surface was partially low or cut parts in which the ring shape of the cut parts are partially discontinued are disposed on the third ring part.