{"id":317,"count":9,"description":"

A butterfly valve is an industrial valve that opens and closes by rotating a valve disc around a stem. It only requires a quarter-turn (90\u00b0) to switch from fully closed to fully open. Compared with gate valves, butterfly valves operate faster, are more compact and lightweight, and have a lower cost. However, even when fully open, the valve disc remains inside the flow path, resulting in greater pressure loss than a gate valve.<\/p>\r\n

Structure of a Butterfly Valve<\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Component<\/strong><\/td>\r\nFunction<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Valve Body<\/td>\r\nConnects to the piping system and houses the valve disc.<\/td>\r\n<\/tr>\r\n
Valve Disc<\/td>\r\nRotates around the stem to shut off, open, or regulate the flow.<\/td>\r\n<\/tr>\r\n
Valve Stem<\/td>\r\nTransmits force from the lever or handwheel to the valve disc.<\/td>\r\n<\/tr>\r\n
Sealing Ring<\/td>\r\nSurrounds the valve disc and ensures tight sealing when the valve is closed. It is also the component most susceptible to wear.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

Common Types of Butterfly Valves<\/h2>\r\n

Classification by Connection Type<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Type<\/strong><\/td>\r\nCharacteristics<\/strong><\/td>\r\nKey Advantages<\/strong><\/td>\r\nNotes<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Wafer Butterfly Valve<\/strong><\/td>\r\nClamped between two flanges using bolts that pass through the assembly.<\/td>\r\nLowest cost and the most commonly used type.<\/td>\r\nLimited working pressure (typically PN10); the valve cannot be removed from one side without dismantling the piping.<\/td>\r\n<\/tr>\r\n
Lug Butterfly Valve<\/strong><\/td>\r\nThe valve body has separate lugs on both sides, with bolts installed independently on each side.<\/td>\r\nAllows a section of pipe downstream of the valve to be removed without depressurizing the entire pipeline.<\/td>\r\nMore expensive than the wafer type.<\/td>\r\n<\/tr>\r\n
Flanged Butterfly Valve<\/strong><\/td>\r\nThe valve body has integrated flanges and is secured with a complete set of bolts.<\/td>\r\nHigher pressure resistance and more stable sealing performance.<\/td>\r\nBulkier and more expensive.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

Important technical point: Lug butterfly valves are suitable for systems that require regular maintenance of individual sections. For example, in a pumping station with multiple branches, technicians can remove the equipment downstream of the valve for repair without having to shut down the pressure in the entire main pipeline.<\/p>\r\n

Classification by Operating Method<\/h3>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Operating Method<\/strong><\/td>\r\nCharacteristics<\/strong><\/td>\r\nSuitable Applications<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Lever-Type Butterfly Valve<\/strong><\/td>\r\nOperated directly by hand, allowing quick opening and closing within a quarter-turn.<\/td>\r\nSuitable for small- or medium-sized pipelines that require frequent manual operation and do not require precise flow regulation.<\/td>\r\n<\/tr>\r\n
Gear\/Handwheel-Type Butterfly Valve<\/strong><\/td>\r\nEquipped with a reduction gearbox, requiring multiple turns of the handwheel to rotate the valve disc.<\/td>\r\nSuitable for large-diameter pipelines where the force available from a lever is insufficient to open or close the valve, or where the valve needs to remain steadily in a specific throttling position without moving.<\/td>\r\n<\/tr>\r\n
Electric Actuator Butterfly Valve<\/strong><\/td>\r\nAn electric motor rotates the valve stem, allowing remote or automatic opening and closing according to control signals.<\/td>\r\nSuitable for systems requiring automatic monitoring and control, SCADA integration, or unmanned pumping stations.<\/td>\r\n<\/tr>\r\n
Pneumatic Actuator Butterfly Valve<\/strong><\/td>\r\nUses compressed air pressure to rotate the valve stem, providing very fast opening and closing.<\/td>\r\nCommonly used in factories equipped with compressed-air systems, where frequent operation or rapid response according to the production process is required.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

Selection note: The larger the valve size, the greater the resistance when rotating the valve disc. From around DN200 and above, direct lever operation is generally no longer practical. A gear\/handwheel mechanism or electric\/pneumatic actuator should be used instead to ensure safe operation and prevent the valve from becoming stuck during operation.<\/p>\r\n

Where Are Butterfly Valves Commonly Used?<\/h2>\r\n

Thanks to their fast operation and reasonable cost, butterfly valves are widely used in municipal water supply and drainage systems, wastewater treatment, HVAC (central air-conditioning) systems, and pipelines that require frequent opening, closing, or flow regulation. For high-pressure, high-temperature, or highly corrosive fluid systems, the disc and sealing material must be selected correctly to ensure the valve's service life and minimize operating risks.<\/p>\r\n

Butterfly Valve vs. Gate Valve: Which Should You Choose?<\/h2>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Criteria<\/strong><\/td>\r\nButterfly Valve<\/strong><\/td>\r\nGate Valve<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n
Opening\/Closing Speed<\/td>\r\nFast (quarter-turn)<\/td>\r\nSlow (requires multiple turns)<\/td>\r\n<\/tr>\r\n
Pressure Loss When Fully Open<\/td>\r\nHigher (the disc still partially obstructs the flow)<\/td>\r\nLower (the gate is outside the flow path)<\/td>\r\n<\/tr>\r\n
Size and Weight (Same Size)<\/td>\r\nMore compact and lightweight<\/td>\r\nBulkier<\/td>\r\n<\/tr>\r\n
Flow Regulation<\/td>\r\nCan be used for stable partial-opening regulation<\/td>\r\nNot recommended, as it may cause wear and vibration<\/td>\r\n<\/tr>\r\n
Cost (Same Size)<\/td>\r\nLower<\/td>\r\nHigher<\/td>\r\n<\/tr>\r\n
Suitable Sizes<\/td>\r\nDN50 and above<\/td>\r\nWider range of sizes, including small sizes<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

In summary: If you need fast opening and closing, cost savings, and limited installation space, a butterfly valve is suitable. If you need minimal pressure loss in the main pipeline or reliable long-term shut-off, a gate valve is suitable.<\/p>\r\n

Reliable Butterfly Valve Supplier in Ho Chi Minh City<\/h2>\r\n

When it comes to butterfly valves, the question customers most often struggle with is not whether to choose a butterfly valve or a gate valve, but which connection type is suitable for long-term maintenance needs. Many projects choose wafer butterfly valves because of their lower initial investment cost. However, after several years of operation, they may find that individual sections of the pipeline cannot be removed when maintenance is required, resulting in higher costs because the pressure of the entire system must be shut down.<\/p>\r\n

Understanding these concerns, An Phu Thanh always provides customers with detailed advice before placing an order, helping them avoid additional costs, time, and labor during installation and operation.<\/p>\r\n

At An Phu Thanh, we offer:<\/p>\r\n

    \r\n\t
  • A wide range of product lines in various sizes and materials.<\/li>\r\n\t
  • Products with CO\/CQ certificates and clear warranty policies.<\/li>\r\n\t
  • Competitive prices. The larger the quantity purchased, the better the price.<\/li>\r\n\t
  • Dedicated technical consultation and support, accompanying customers from material selection through after-sales service.<\/li>\r\n<\/ul>\r\n

    Contact Us for Butterfly Valve Consultation & Quotation<\/h2>\r\n

    Do you need advice and a quotation for the butterfly valve connection type suitable for your project? Contact An Phu Thanh today at Hotline 0946 729 913. Our team is always pleased to support you.<\/p>\r\n

    An Phu Thanh<\/p>\r\n

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