SOFT SEALING GATE VALVE

PROBLEM TO BE SOLVED: To provide a soft sealing gate valve capable of surely suppressing melting of a rubber component to water, and exhibiting excellent durability of a guide protrusion of a valve element.SOLUTION: A soft sealing gate valve includes a valve element 2 moved to an opening and closing direction and opening and closing an internal flow passage 10 of a valve casing 1. The valve element 2 includes a valve body 20 having cut-off parts 22 and 23 abutted to valve seat parts 13 and 14 of the valve casing 1, and a guide protrusion 21 fitted in a guide groove 15 of the valve casing 1 and movable in the guide groove 15, and at least the cut-off parts 22 and 23 of the valve body 20 are covered by a rubber material. When the valve element 2 is guided and moved to the closing direction by the guide protrusion 21 and the guide groove 15, the cut-off parts 22 and 23 are abutted to the valve seat parts 13 and 14, and water is cut off by elasticity of the rubber material. The whole outer surface of the rubber material of the valve body 20 is covered by a resin material, and at least a portion of the guide protrusion 21 slidably contacted with the guide groove 15 is covered by the resin material. The resin material of the guide protrusion 21 is thicker than the resin material of the valve body 20. 【課題】ゴム成分の水への溶け出しをより確実に抑え、かつ、弁体のガイド突部の耐久性がよいソフトシール仕切弁を提供する。【解決手段】ソフトシール仕切弁は開閉方向に移動して弁箱１の内部流路１０を開閉する弁体２を備える。弁体２は、弁箱１の弁座部１３、１４に当接する止水部２２、２３が設けられた弁本体２０と、弁箱１のガイド溝１５に嵌ってガイド溝１５内を移動可能なガイド突部２１とを備え、弁本体２０の少なくとも止水部２２、２３はゴム材で覆われている。弁体２がガイド突部２１とガイド溝１５とによって閉方向に案内されて移動すると、止水部２２、２３が弁座部１３、１４に当接し、ゴム材の弾性によって止水が行われる。弁本体２０のゴム材の外面全体は樹脂材で覆われており、ガイド突部２１の少なくともガイド溝１５に摺接する部分は樹脂材で覆われている。ガイド突部２１の樹脂材は弁本体２０の樹脂材よりも厚みがある。【選択図】図２