BUTTERFLY VALVES DEFINITION BASIC AND TUTORIALS


A butterfly valve is a quarter-turn valve that controls flow by means of a circular disk pivoting on its central axis.



Recommended
● For fully open or fully closed service
● For throttling service
● For frequent operation
● Where positive shutoff is required for gases or liquids
● Where minimum amount of fluid trapped in line is allowed
● For low pressure drop across valve

Applications
● General service, cryogenic service, high-temperature service, liquids, gases, slurries, liquids with suspended solids

Advantages
● Compact, lightweight, low-cost
● Low maintenance
● Minimum number of moving parts
● No pockets
● High capacity
● Straight-through flow
● Self-cleaning

Disadvantages
● High torque for actuation
● Limited pressure-drop capability
● Prone to cavitation

Variations
● Construction: wafer, lug wafer, flanged, screwed, fully lined
● Style: single offset, double offset, triple offset

Materials
● Body: bronze, iron, ductile iron, carbon steel, low-alloy steel, stainless steel, Monel, nickel alloys, PVC plastic, plastic/elastomer lined
● Disk: all metals, elastomer coatings such as TFE, Kynar, Buna-N, neoprene, Hypalon
● Seat: elastomeric, plastic, nickel plated, stellite, tungsten carbide, ceramic


Special Installation and Maintenance Instructions
● May be operated by lever, handwheel, or chainwheel.
● Allow sufficient space for operation of handle if lever-operated.
● Valves should remain in closed position during all handling and installation operations.

Ordering Specifications
● Type of construction
● Style
● Type of seat
● Body material
● Disk material
● Seat material
● Type of actuation
● Operating pressure
● Operating temperature


Related post



3 comments:

Valves Only said...

Thank you for sharing for such informative blog post. I really appreciate your efforts and dedication. Get more info about steam trap manufacturer in USA

racheprocess said...

Your blog is awfully appealing. I am contented with your post. I regularly read your blog and its very helpful. If you are looking for the best floating ball valve manufacturers, then visit Rache Process Equipment. Thanks! I enjoyed this blog post.

henry said...

The legacy of DBV Valve (Dong Bao Valve) starts in 2001. After retiring from the air force, Gavin Gu went back to Wenzhou, the base of valve manufacturers in China. DBV valve

Post a Comment

free counters

Archive