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China Lug Butterfly Valve with Worm Gear - Quality Suppliers & Factory for DN50 to DN600
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Worm gear operated lug butterfly valve of Bundor.png.jpg
Worm gear operated lug butterfly valve Bundor.png.jpg
Worm gear operated lug butterfly valve from Bundor.png.jpg
Worm gear operated lug butterfly valves Bundor.png.jpg

China Lug Butterfly Valve with Worm Gear - Quality Suppliers & Factory for DN50 to DN600

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Size Range: 2~24 / DN50 - DN600

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Pressure Ratings: PN10, PN16

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Seat Materials: NBR, EPDM, VITON, PTFE

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Disc Materials: Ductile Iron, WCB, CF8, CF8M, Aluminum Bronze C958

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Stem Materials: SS304, SS316

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End Connection: Wafer

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Our lug butterfly valve is designed to meet the ISO 5211 standard, ensuring reliability and quality. As a leading factory and supplier in China, we specialize in manufacturing high-performance valves that cater to various industrial applications. Our valves are crafted from durable materials and are available in multiple sizes and pressure ratings to suit your specific needs.

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    Product Details

    Product Details

    The lug butterfly valve, which has lugs that allow it to be bolted onto the flanges and provide a secure connection, is appropriate for applications where the valve must be installed between two flanges. On the other hand, the wafer butterfly valve, which has a wafer that allows it to be sandwiched between the pipes and provide a tight seal, is appropriate for applications where the valve must be installed between two pipes.

    Wafer-type butterfly valves typically come with the lowest price tag among the various connection methods. Lug-type valves are next in line, while flange-type valves are the most costly, with price generally correlating to overall weight. For further details on lug butterfly valves with handles and their uses, reach out to Fluido.

    Key Features
    • 💥 Explosion-proof valve stem: Designed to prevent the valve stem from being ejected under pressure.
    • 🔄 Bidirectional: Capable of operating effectively in both flow directions.
    • 🔥 Fire Safety Design: Carefully designed to maintain integrity and performance even in the event of a fire.
    • ⚙️ Low-friction valve seat: The valve seat is designed to minimize friction, resulting in smoother operation.
    Standard Test
    Valve Body Test

    This test is conducted after the valve assembly is completed and the valve disc is in the half-open position. The test pressure is 1.5 times the working pressure, and water is used. It is also known as the valve body hydrostatic test.

    Seat Ring Test

    This test is conducted with water at 1.1 times the working pressure.

    Functional / Operational Testing

    During the final inspection, each valve and its actuator (flow control lever/gear/pneumatic actuator) will undergo a comprehensive operational test (opening/closing). This test is conducted under no-pressure and ambient temperature conditions to ensure proper functioning of the valve/actuator components (including solenoid valves, limit switches, and accessories such as air filter regulators).

    Special Testing

    Additional testing can be performed according to the customer's specific instructions.

    Specification
    Lug Butterfly Valve Worm Gear

    No.

    Part Name

    Material

    1

    Body

    SS316/SS304

    2

    Hex Nut

    SS304

    3

    Gasket

    SS304

    4

    Seat

    PTFE

    5

    Ball

    SS316/SS304

    6

    Stem

    SS316/SS304

    7

    Stem Gasket

    PTFE

    8

    Packing

    PTFE

    9

    Gland

    SS304

    10

    Handle

    SS201

    11

    Spring Washer

    SS304

    12

    Nut

    SS304
    Dimensions
    DN50 — DN350
    DN A D1 L1 L2 L3 B PN16 PN10 150LB φD3 φD4 n1-φd D5
    D2 n-M D2 n-M D2 n-M
    2″ DN50 42 73.3 54 161 25 9 125 4-M16 125 4-M16 120.7 4-5/8″ 65 50 4-8 135
    2.5″ DN65 44 86 62 175 25 9 145 4-M16 145 4-M16 139.7 4-5/8″ 65 50 4-8 135
    3″ DN80 45 100.9 82 181 25 9 160 8-M16 160 8-M16 152.4 4-5/8″ 65 50 4-8 135
    4″ DN100 51.5 132 99 200 28 11 180 8-M16 180 8-M16 190.5 8-5/8″ 90 70 4-10 135
    5″ DN125 54 156 114 213 28 14 210 8-M16 210 8-M16 215.9 8-3/4″ 90 70 4-10 135
    6″ DN150 55 185 129 236 28 14 240 8-M20 240 8-M20 241.3 8-3/4″ 90 70 4-10 135
    8″ DN200 59 235 150 260 33 17 295 12-M20 295 8-M20 298.5 8-3/4″ 125 102 4-12 270
    10″ DN250 66 289 186 292 33 22 355 12-M24 350 12-M20 362 12-7/8″ 125 102 4-12 270
    12″ DN300 76 341 218 337 33 22 410 12-M24 400 12-M20 431.8 12-7/8″ 125 102 4-12 270
    14″ DN350 76 372 242 368 45 22 470 16-M24 460 16-M20 476.3 12-1″ 125 102 4-12 270
    DN400 — DN600
    DN A D1 L1 L2 L3 φD N-b K PN16 PN10 150LB φD3 φD4 n1-φd1
    D2 n-φd D2 n-φd D2 n-φd
    16″ DN400 86.5 436 320 403 52 33.15 45667 36.2 525 16-M27 515 16-M24 539.8 16-1″ 175 140 45765
    18″ DN450 104.6 487 351 415 52 38 45667 41 585 20-M27 565 20-M24 577.9 16-1 1/8″ 175 140 45765
    20″ DN500 130 532 386 466 64 41.15 45669 44.2 650 20-M30 620 20-M24 635 20-1 1/8″ 175 140 45765
    24″ DN600 152 651 446 525 70 50.65 45673 54.7 770 20-M33 725 20-M27 749.3 20-1 1/4″ 210 165 45769
    Frequently Asked Questions
    What is the difference between a lug butterfly valve and a wafer butterfly valve?
    A lug butterfly valve features threaded lugs that allow it to be bolted directly onto flanges, providing a secure, removable connection suitable for end-of-line service. A wafer butterfly valve is sandwiched between two pipe flanges using through-bolts, creating a tight seal — ideal for inline installation where both sides remain connected.
    What materials are used in the construction of this lug butterfly valve?
    The valve body, ball, and stem are available in SS316 or SS304 stainless steel for corrosion resistance. Sealing components such as the seat, stem gasket, and packing are made of PTFE for chemical compatibility and low friction. Other hardware components like the gland and hex nut are made of SS304, and the handle is SS201.
    What pressure tests are performed on these butterfly valves?
    Each valve undergoes three standard tests: a valve body hydrostatic test at 1.5× working pressure with the disc half-open, a seat ring test at 1.1× working pressure using water, and a full functional/operational test of the valve and actuator under no-pressure ambient conditions. Special custom testing is also available upon request.
    What size range is available for this lug butterfly valve?
    The valve is available in sizes from DN50 (2″) up to DN600 (24″), covering a wide range of industrial pipeline requirements. Dimensional data for flange drilling patterns are provided for PN10, PN16, and ANSI 150LB standards.
    Is this butterfly valve suitable for fire-safe applications?
    Yes. The valve incorporates a fire safety design that ensures it maintains structural integrity and sealing performance even in the event of a fire. This makes it suitable for use in fire-sensitive industrial environments and pipelines carrying flammable media.
    Can this valve be operated with different types of actuators?
    Yes. This lug butterfly valve is compatible with multiple actuator types, including manual flow control levers, worm gear operators, and pneumatic actuators. All valve and actuator combinations undergo comprehensive operational testing during final inspection to verify correct open/close function, including solenoid valves, limit switches, and air filter regulator accessories.

    Product Packaging

    application 1
    application 2
    application 3
    application 4
    application 5
    application 6
    01020304

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