FLANGE AND PUMP SYSTEM USING FLANGE

PROBLEM TO BE SOLVED: To provide a flange exhibiting high strength and anticorrosion equivalent to those of a bronze or stainless steel flange and capable of suppressing raw material cost and manufacturing cost, and a pump system using the flange.SOLUTION: A flange comprises: a synthetic resin flange 40 including a pipe female screw provided in a central portion and formed of synthetic resin; and a metal member fixedly attached to an outer circumference of the pipe female screw, the metal member being fixedly attached to the synthetic resin flange 40 by insert molding, and a plurality of holes in which the synthetic resin flows being provided in the metal member. A pump system including a pump portion performing pump action by causing a pump drive motor 2 to drive an impeller provided in a casing to rotate comprises: an inlet pipe-connecting the pump portion to a water source; and an outlet 7 pipe-connecting water pumped up and pressure-increased by the pump portion to a use position (tap or the like). 【課題】青銅製やステンレス製のフランジと同等の高い強度や耐食性を有し、原材料ならびに製造コストが抑えられるフランジ及びそのフランジを用いたポンプ装置を提供する。【解決手段】中央部に管用めねじを有し合成樹脂で形成される合成樹脂製フランジ４０と、前記管用めねじの外周に固着される金属部材と、を有し、金属部材と、前記合成樹脂製フランジと、をインサート成形で固着し、前記金属部材に合成樹脂が流入する複数個の孔を設けたフランジ。ケーシング内に設けられた羽根車をポンプ駆動用モータ２により回転させてポンプ作用を行うポンプ部を有し、前記ポンプ部と水源とを配管接続する吸込口と、前記ポンプ部により揚水増圧された水を使用位置（蛇口等）まで配管接続する吐出口７と、前記フランジを備えたポンプ装置。【選択図】図２