发明名称 High pressure abrasive slurry check valve
摘要 A piston check valve for use in a system which conveys abrasive materials includes a gland nut which connects the valve to the piping system, a valve body mounted on the gland nut, a valve seat mounted on the valve body, and a piston mounted within the valve body. The piston can translate within the through bore of the valve seat and has a shaft and a head which contacts the first end of the valve seat when the valve is closed. A coil spring is located within the through bore of the valve seat and biases the valve closed. A first O-ring is mounted on the first end of the valve seat and is sufficiently wide to prevent sufficient quantities of chips from becoming lodged within the surface of the inner O-ring to form a hard bridge across the resilient O-ring, allowing erosion of the valve sealing surfaces. The first end of the valve seat has an O-ring groove which receives the O-ring. A second O-ring can be mounted on the first end of the valve seat at the outer periphery of the valve seat.
申请公布号 US5482077(A) 申请公布日期 1996.01.09
申请号 US19940339027 申请日期 1994.11.14
申请人 MINNESOTA MINING AND MANUFACTURING COMPANY 发明人 SERAFIN, MARK
分类号 F16K15/06;F04B53/10;(IPC1-7):F16K15/06 主分类号 F16K15/06
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