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US3348567A
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Compound pressure sealant-sealed valve
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Automatic sealant-sealed valve
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Automatic plastic-sealed valve having groove cleaning means
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US3253609A
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Push-pull automatic sealing system for valves
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US3190304A
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Automatic plastic-sealed valve with two-stage sealing
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US3190303A
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Automatic plastic sealed gate valve
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US3190302A
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Dual sealed automatic lubricant sealed gate valve
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Pressure sealed valve
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Automatic lubricant-sealed plug valve
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Automatic sealed gate valve
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Gate valve construction
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Automatic sealant-lubricant supply fitting for pressure vessels
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Automatic lubricant-sealed plug valve
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Automatic lubricated gate valve
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Stem and stuffing box construction for non-rising stem gate valves
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US2954044A
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Automatic lubricant sealed gate valve
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US2869574A
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Automatic lubricated gate valve
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Quick sealing automatic sealing gate valve
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US2780233A
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Through conduit gate valve
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US2657898A
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Smooth opening automatic lubricated gate valve
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