| 摘要 |
A gate valve having an inlet and an outlet conduit extending into a housing spaced from each other to provide an opening therebetween with a sleeve telescoping with the inlet and outlet conduits and a valve gate positioned for transverse movement into and out of the opening with the gate valve and sleeve being separately actuated by separate means extending through the housing whereby the outer ends of the conduits may be spaced the prescribed distance apart for interchangeability with standard sized valves and the sleeve may be firmly moved against the gate valve to seal the gate valve against the inlet conduit. Lubricant sealing grooves on the inside of said sleeve adjacent each end of the sleeve for lubricating and sealing the sleeve relative to the inlet and outlet conduits.
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