| 摘要 |
A slurry gate valve is disclosed for controlling the flow of slurry along a pipeline. The gate valve comprises a cylindrical conduit portion and a gate housing portion. The cylindrical conduit portion includes a first and second annular bolt flange defining first and second terminals disposed at opposite ends of the cylindrical conduit portion. A first and a second metallic sleeve liner, respectively, extend inwardly from the bolt flanges and define therebetween a gate receiving slot. The gate housing portion is secured to the cylindrical portion and houses a gate guide track which is in planar alignment with the gate receiving slot. A gate has a lower portion which cooperates with the gate receiving slot in substantially fluid tight relationship therewith. The gate travels from a closed position to an open position wherein the gate substantially fully withdrawn from the conduit portion. The gate valve further includes means for driving the gate between the open and the closed position. In a further embodiment of the invention, the first and the second sleeve liners each include an annular channel and an undercut key portion for the reception of an annular wiping seal permanently formed therein. The wiping seal extends outwardly from the annular channel and sealingly engages adjacent surfaces of the gate to inhibit seepage of the slurry thereby.
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