flanged butterfly valve

Body:   ASTM A536 65-45-12, WCB, CF8M
Bonded with NBR or EPDM
Disc:  ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462
Stem:  SS420,SS431
Body style:   Flange
Nominal diameter:   2″ – 88″ (DN50mm – DN2000mm)
Top flange:  ISO5211
Operating pressure:  16bar for DN50-DN300, 10bar for DN350-DN2200


    Flanged butterfly valve

    Double flanged butterfly valve features a bonded liner extending over the flanges. The double flange design is suitable for high pressure loading and for use in heavy industry, shipbuilding, severe vacuum applications and water treatment industry like potable water, water treatment and wastewater applications.

    Double flanged butterfly valve – a versatile and high-performance solution for fluid control applications. Engineered with precision and crafted from top-quality materials, this innovative valve offers unparalleled performance, durability, and ease of use.

    Material & Specifications

    Flange Butterfly Valve is made from robust materials to ensure longevity and resistance to corrosion. The valve body is available in WCB, CF8M, DI, and CI. The disc is manufactured from CF8M, CF8, 2507, and 1.4529 materials, providing you with a wide range of options tailored to your requirements. Moreover, the valve seats come in EPDM, NBR, VITON, and PTFE materials, catering to the diverse needs of fluid control systems.

    Product Function

    This advanced valve system serves multiple functions, such as:

    • Fluid Control: Precise regulation of fluid flow within pipes and channels
    • Switch Control: Seamless switching between fluid flow lines and process streams
    • Modulating Control: Accurate adjustment of fluid flow rates for optimal process control

    Key Features & Benefits

    Our Flanged Butterfly Valves boasts several cutting-edge features that set it apart from other valve systems:

    ISO5211 Top Flange

    The ISO5211 top flange, coupled with a stem heat design, makes it perfect for direct mounting of actuators. This feature allows for easy integration with your existing fluid control infrastructure and eliminates the need for additional adaptors or couplings.

    No Exposed Pins or Bolts

    The stem-to-disc connection is equipped with a secure and streamlined design. By eliminating exposed pins and bolts, the chances of leakage or corrosion are significantly reduced, ensuring optimum performance and an extended service life.

    For added versatility, our butterfly valve flange type is compatible with both pneumatic and electric actuators. This compatibility allows you to choose the most suitable actuation method for your specific needs and ensures flawless operation.
    To sum up, the Flanged Butterfly Valve offers a superior solution for a vast array of fluid control applications. Backed by robust materials, advanced features, and unmatched versatility, our valve system ensures seamless integration, optimal performance, and lasting durability. Upgrade your fluid control system with our Flanged Butterfly Valve – a game-changer for precise and efficient fluid management.

    1,ISO5211 top flange together with stem heat suitable for direct mounting of actuators
    2,Stem anti-blowout design keep safety in field use
    3,Bonded seat protects the body and shaft out of contact with medium
    4,No exposed pins or bolts for stem-to-disc connection
    5,Single flange mounting is possible
    6,Can be installed in any desired position
    7,Bubble-tight shut off at full pressure rating
    8,Large flow capacity and enough strength



    NO. Part name Material
    1 Body ASTM A536 65-45-12, WCB, CF8M
    Bonded with NBR or EPDM
    2 Disc ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462
    3 Stem SS420,SS431
    4 Screw SS304
    5 Retainer SS201
    6 Weather seal NBR
    7 Bearing RPTFE with Graphite on I.D.
    8 Lower Stem SS420, SS431
    9 Bottom cover Same as body
    10 Bolt SS304
    11 Screw SS304


    Body style Flange
    Nominal diameter 2″ – 88″ (DN50mm – DN2000mm)
    Top flange ISO5211
    Operating pressure 16bar for DN50-DN300, 10bar for DN350-DN2200
    Temperature range -20 °C to + 140 °C (depending on pressure, medium and material)
    Flange accommodation EN 1092 PN 6/PN10/PN16
    ASME Class 150AS 4087
    PN10/ PN16JIS 5K/10K
    Applications Potable Water, Wastewater, Seawater, HVAC
    Operation Hand lever, gear box, pneumatic actuator, electric actuator


    flange butterfly valve


    SIZE A B C D E F n d G J L WT(kg)
    50 2″ 142 80 13.5 165 9 50 4 8 70 15 108 9
    65 2 1/2″ 155 89 13.5 185 9 50 4 8 70 15 112 10
    80 3″ 161 95 13.5 200 9 50 4 8 70 17 114 12
    100 4″ 180 114 13.5 229 11 70 4 10 90 17 127 16
    125 5″ 193 127 17.5 254 14 70 4 10 90 19 140 24
    150 6″ 205 139 17.5 285 14 70 4 10 90 19 140 29
    200 8″ 250 175 24.5 343 17 102 4 12 125 21 152 39
    250 10″ 282 203 25 406 22 102 4 12 125 23 165 60
    300 12″ 326 242 25 483 22 102 4 12 125 24 178 82
    350 14″ 358 267 30 533 27 125 4 14 150 24 190 108
    400 16″ 380 301 30 597 27 125 4 14 150 28 216 145
    450 18″ 422 381 39 640 36 140 4 18 175 33 222 183
    500 20″ 479 387 39 710 36 140 4 18 175 40 229 230
    600 24″ 562 457 49 840 46 165 4 22 210 40 267 303
    700 28″ 560 465 95 910 63.35 254 8 18 300 40 292 410
    750 30″ 610 508 95 984 63.35 254 8 18 300 43 308 552
    800 32″ 620 519 95 1025 63.35 254 8 18 300 43 318 610
    900 36″ 692 576 130 1125 75 254 8 18 300 46 330 750
    1000 40″ 735 640 130 1255 85 254 8 22 300 50 410 945
    1100 44″ 813 735 150 1355 85 254 8 22 300 53 450 1120
    1200 48″ 917 783 150 1485 105 298 8 22 350 57 470 1350
    1400 56″ 1000 925 200 1685 120 356 8 32 415 60 530 1700
    1500 60″ 1050 950 200 1820 140 356 8 32 415 78 570 2000
    1600 64″ 1150 1045 200 1930 140 356 8 32 415 65 600 2500
    1800 72″ 1260 1156 280 2130 160 406 8 40 475 70 670 3500
    2000 80″ 1363 1350 280 2345 160 406 8 40 475 75 760 4000
    2200 88″ 1500 1430 300 2555 180 483 12 40 560 85 636 4500


    What is a flanged butterfly valve?

    A flanged butterfly valve is a type of flow control device commonly used in water supply systems, wastewater treatment facilities, and other industrial process applications. It consists of a flat disc mounted to the end of a spindle that is rotated by an actuator. The disc has a circular hole cut into it which can open or close depending on the direction of rotation.

    The main benefit of using this kind of valve lies in its capacity for both throttling and shut-off operation. That is to say, while other valves are largely limited to one or the other function (for example, ball valves are typically used for shut-off alone), butterfly valves have proven themselves capable of both throttling and shut-off services depending upon their design parameters. This flexibility makes them particularly useful when dealing with process flows where volume adjustment may be required (such as in chemical plants).

    In terms of construction, most flanged butterfly valves feature unpacked glands coupled with soft seal seat rings that permit use over wide temperature ranges without compromising tightness. Furthermore, they can generally be customized for different operating conditions via optional components such as air filters/regulators or anti-static devices – all while maintaining their inherent low pressure drop characteristics and good flow control capabilities.

    What are the flange types of butterfly valve?

    Butterfly valves come in a variety of flange types, including:

    Wafer type butterfly valve: This type of butterfly valve is designed to fit between two pipes or other fittings with the same size and rating. It has two wings that form a disc which seals when they are brought together. The wafer type butterfly valve creates an even seal throughout the system, making it ideal for use in water supply systems and other low-pressure applications.

    Lugged type butterfly valves: These have lugs that extend from the body to connect with separate mounting bolts which keep the valve securely closed when tightened down. They are usually used in medium-to–high pressure applications where precise control over flow rate is needed, such as in steam distribution systems or compressed air lines.

    Flanged end butterfly valves: This particular type of flanged end is most often seen on industrial pipelines and vessels due to its robust nature and excellent sealing capabilities when compared with conventional wafer designs. It also provides easy access for cleaning purposes by simply removing a few bolts without having to take apart the entire system. A downside to this design may be increased cost since most manufacturers require special hardware for installation as well as additional reinforcements around their flange connectors which can add cost onto your piping infrastructure project budget if you’re not careful!

    What is a single flange butterfly valve?

    A single flange butterfly valve is a type of control valve that uses a circular disc – or the ‘butterfly’ – to regulate the flow rate of a fluid. This type of valve can be used as an isolation, actuation or throttling device for many industrial applications. The unique construction of the single flange design provides several advantages over other types of valves.

    First, because it requires only one flange connection, this reduces total cost and assembly time while allowing for easy installation and maintenance in tight spaces with limited access. Additionally, it features high lift capabilities which allow for better regulation at high flow rates than other designs available on the market today. This feature also makes them more resistant to corrosion and abrasion when compared to standard valves made from traditional materials such as stainless steel or bronze.

    flange valve

    Furthermore, this type of valve is one-piece in design, meaning there are no moving parts that can potentially wear out over time. As such, they provide improved reliability when exposed to shock loads associated with unpredictable operations often found in today’s industrial process environments. Because the disc remains completely contained within its housing during operation there are minimal chances for cavitation erosions or external fouling build up around critical areas like seats and seals – making them ideal solutions where safety and sustainability are key factors in your system’s performance requirements.

    What is a double flange butterfly valve?

    A double flange butterfly valve is a type of rotary disc valve used to regulate the flow of liquids and gases. It consists of two concentric discs with matching grooves encased in an outer body. The inner disc, also known as the “butterfly” rotates around its own axis to open or close off portions of the pipe that is connected to it. When fully opened, the butterfly allows for maximum flow through the pipeline – making it ideal for applications requiring high-flow rates and low pressure drops across valves.

    Flanged butterfly valve

    The double flange design adds additional strength compared to single flange models since it offers greater stability when installed between two pipes with different diameters or length differences than what would be possible with a single flange design. This makes it perfect for use in pipelines and heavy duty pressure regulating systems due to its ability to withstand higher pressures without significant leakage or damage. Additionally, this extra layer of protection means that maintenance costs are significantly reduced which can lead to a better return on investment over time when used within commercial facilities, factories, and other industrial settings where cleanliness and regulation may be difficult due to limited access points in tight spaces.

    What is the difference between a lug and flanged butterfly valve?

    Lug and flanged butterfly valves are two major types of valves used for fluid control systems in many different industries. They serve very similar purposes: both the lug and flanged designs enable a valve to be opened or shut off to regulate flow through a pipe. So, what is the difference between these two valve types?

    The most obvious distinction between lug and flanged butterfly valves lies in their installation method – lugs are designed with extended ears or “lugs,” while flanges follow more traditional connection standards such as bolting. Lug connections offer several advantages over other methods: they allow for quicker setup times, require less space when installing multiple valves, provide greater flexibility in piping configurations, all while offering superior structural stability than screwed fittings. Flanges also have their own set of benefits; namely providing higher pressure ratings compared to lugs when using standard bolting. Furthermore, as long as you don’t disassemble the flange bolts too often, they tend to provide excellent service lifetime cycles without any need for maintenance or repair work beyond general cleaning/flushing out of your system components once-in-a-while.

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