Hopkinson double parallel plate gate valve
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Question for experts in instrumentation: The Hopkins double parallel plate gate valves come in straight-through and venturi types – how should one choose between them? What are the characteristics of the venturi type?
Overall diameter: The parallel sliding design boasts the advantage of maintaining liquid sealing without the need for wedging. There is no mechanical stress between the valve petals, and there are no issues related to liquid cooling. Venturi tube design: The venturi tube design can be used when a relatively high pressure drop is acceptable. The well-established principles of liquid flow in venturi tubes are used to minimize pressure drop. The venturi valve features a suspension ring follower design. The swivel member at the fully open position can fill the gap between the valve seats, thereby providing a smooth flow path and maintaining an intact venturi profile.