Substantially fluid tight sealed is such that fluid receiving chamber, for example milk products, coupled to the chamber for stirring or dilute the fresh food such as chocolate products, provides a one-way valve for opening and closing the flow passage in the chamber at any time to. The present valve is, and has high robustness valve seat, an inlet located at one end of the valve seat, normally closed with a sealing wall extending in the over-axis direction between the outlet and inlet and outlet located at the other end of the valve seat valve internal channel is formed along the axial direction, and such that the sealing wall by the valve within the passage inlet and outlet between section is sealed fluid-tight, flexible high valve material is superposed on the valve seat , equipped with a. Building frame extends axially, so that the space can be a hit passage to clean the valve and the fluid receiving chamber is formed between the valve member, spaced in a radial direction relative to the valve member.実質的に流体密封止されるよう流体受容室、例えば乳製品、チョコレート製品等の生鮮食品を希釈乃至攪拌するための室に連結され、その室に至る流路を随時開閉する一方向弁を提供する。本弁は、堅固性が高い弁座と、弁座の一端に位置する入口、弁座の他端に位置する出口並びに入口・出口間に亘り軸方向に延びる封止壁を有する常閉型の弁内流路が軸方向に沿い形成され、その封止壁によって弁内流路の入口・出口間区間が流体密封止されるよう、弁座に重畳されていて可撓性が高い弁材と、を備える。躯体は軸方向に延び、本弁及び流体受容室の清掃に当たり流路となりうる空間が弁材との間に生じるよう、弁材に対し径方向に間隔を置く。
