| 摘要 |
PCT No. PCT/SE85/00189 Sec. 371 Date Dec. 24, 1985 Sec. 102(e) Date Dec. 24, 1985 PCT Filed Apr. 26, 1985 PCT Pub. No. WO85/05430 PCT Pub. Date Dec. 5, 1985.A minimum flow valve device includes a housing providing a liquid passageway therethrough having an inlet end and an outlet end; a guide element mounted in the liquid passageway which provides an internal chamber that is open towards the inlet end of the liquid passageway, the guide element including a discharge orifice communicating with the internal chamber; an unloading pipe extending through the housing and communicating with the discharge orifice; an annular non-return valve element; and a valve sleeve member connected to the non-return valve element and extending within the internal chamber. The valve sleeve member includes orifices such that when the non-return valve element and the valve sleeve member are positioned to block liquid flow through the liquid passageway, liquid will flow through the discharge orifice and out the unloading pipe.
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