公开(公告)号：EP0576624A4

公开(公告)日：1994-02-09

申请号：EP92911878

申请日：1992-03-10

申请人： MICROLIFT SYSTEMS, INCORPORATED

发明人： MAPLES, WILLIAM, A.

IPC分类号： B03D1/26 ,  B01D17/02 ,  B03D1/24 ,  C02F1/24 ,  F16K31/143

CPC分类号： B03D1/1431 ,  B01D17/0205 ,  B01D17/0214 ,  B03D1/028 ,  B03D1/1487 ,  B03D1/24 ,  Y10T137/86372

摘要： A self-cleaning valve for discharge of a pressurized dissolved air flotation aqueous treatment liquid from a high pressure reservoir to a low pressure body of liquid to be treated is provided. The valve includes a discharge head body adapted to be attached to a conduit supplied with pressurized treatment liquid which is provided with a central opening for discharge of a treatment liquid. The opening is controllable by means of a reciprocable cap positioned to reciprocate from a position whereon it restricts flow of liquid through the opening to a position wherein flow in unrestricted. The cap is attached to a reciprocable piston rod attached at its opposite end to a piston that is movable within an enclosed cylinder. The cylinder is provided with a port or opening on each side of said piston into which a source of pressurized air connectable to cause movement of the piston and thus opening and closing of the valve by selectively directing the flow of said pressurized air to either side of the piston. A variable pressure regulating means can be provided to regulate the amount of flow through the valve.

摘要翻译： 提供了一种用于将加压溶解空气浮选水性处理液体从高压储存器（76）排出到低压液体体（70）的自清洁阀（10）。 阀（10）包括适于连接到供应有加压处理液的导管（18）的排出头主体（12），所述加压处理液配备有用于排出处理液的中央开口（22）。 开口（22）可由可往复运动的帽（32）控制，所述往复帽定位成从限制液体通过开口（22）的位置往复运动到流动不受限制的位置。 盖（32）连接到可往复运动的活塞杆（36）上，活塞杆的另一端连接到可在封闭缸（14）内移动的活塞（38）。 所述气缸（14）在所述活塞（38）的每一侧上设有端口（60,62），加压空气源（95）可连接到所述端口中以引起所述活塞（38）的移动并因此打开和关闭所述活塞 阀（10）。