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May . 13, 2024 11:15 Back to list

Types Of Cast Iron Butterfly Valves



Types Of Cast Iron Butterfly Valves

Wafer Type Butterfly Valve

 

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With a Wafer valve, a longer bolt or threaded rod is used that passes right through both flanges and the valve. This pulls the flanges together which holds the valve in place.

THREADED BUTTERFLY VALVE

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The Wafer type Butterfly Valve is placed between pipe flanges, and the flange bolts surround the valve body. The Wafer Type Butterfly Valve is suitable for most flanges (including Table E, PN16 and Ansi150). If either side of the valve needs maintenance, then the entire line must be shut down

Lugged Butterfly Valve:

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Lugged butterfly valves have threaded lugs on the valve body. The flange holes align with the threaded lugs, meaning that flanges can be bolted directly to the valve

 

The Lugged Butterfly Valve has threaded lugs on the periphery of the valve body to provide passages for bolt holes that match with those in the flanges. This design enables the disconnection of one side of the line without affecting the other. The Butterfly Valve is classified as a quarter-turn valve. This works like a ball valve for quick shutoff, however, it can open and close incrementally unlike a ball valve.


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