Lug butterfly valve

Triple Offset Butterfly Valves

Body:  WCB, CF8,CF8M
Disc:  CF8,CF8M,CF3M
Seat:  UNS31803(duplex)+graphite
Connection:  Wafer,Flange
Size:  2″-80″
Pressure:  Class150,Class300
Flange standard: ASME B16.5 Class150，Class300; EN1092 PN16, PN25, PN40







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    Description

    A Comprehensive Guide to Triple Offset Butterfly Valves

    Triple Offset Butterfly Valve are industrially significant, offering a reliable and zero-leakage mechanism. In this guide, we will cover:

    1. The technical specifications of the valve
    2. The advantages of using this type of valve
    3. The applications in which they are best suited
    4. Comparisons to other valve types
    5. Important maintenance and repair procedures
    6. Common issues that may arise with Triple Offset Butterfly Valves

    Technical Specifications

    Double offset butterfly valve are engineered to provide zero leakage through a no-rubbing 90-degree rotation mechanism across a wide range of pressure and temperature conditions. Some key technical specifications include:

    • Connection: Double flange
    • Size Range: 3″-80″ for PN10,PN16,Class150; 3″-48″ for PN25,PN40,Class300; 3″-24″ for Class600
    • Pressure Range: PN10,PN16,PN25,PN40,Class150,Class300,Class600
    • Flange Standard: ASME B16.5 Class150,Class300,Class600; EN1092 PN16,PN25,PN40
    • Face to Face: ISO 5752, ASME B16.10, API609 Double flanged short pattern
    • Pressure Test: API 598, ISO 5208 Rate A, ANSI B16.104(ANSI/FCI 70-2)Class Ⅵ
    • Temperature Range: -29°C to +538°C
    • Operator Options: Lever, Gearbox, Pneumatic actuator, Electric actuator

    Advantages of Triple Offset Butterfly Valves

    The primary advantages of triple offset butterfly  include:

    1. Zero Leakage: The valve is designed to achieve zero leakage, making it highly suitable for applications demanding tight shutoff.
    2. Versatility: These valves can handle high-temperature and high-pressure applications, making them useful across a wide range of industries.
    3. Lower Torque Requirements: The triple offset design reduces the torque requirement for opening and closing the valve, making it more energy-efficient.
    4. Longevity: Due to the no-rubbing action during rotation, the valve components experience less wear, increasing the overall lifespan of the valve.

    Applications of Triple Offset Butterfly Valves

    Triple Offset Butterfly Valves are used in various industries such as:

    • Oil & Gas
    • Chemical & Coal
    • Petrochemical
    • Desalination Plants
    • Waterworks
    • Fossil Fuel Applications
    • District Heating

    Comparisons to Other Valve Types

    Triple offset valve  excel compared to other valve types in several ways:

    1. Superior to Globe Valves: Due to their compact design and lower cost, Triple Offset Butterfly Valves are a more economical choice when compared to Globe Valves.
    2. Low Maintenance vs. Ball Valves: Triple Offset Butterfly Valves have fewer moving parts, making them easier to maintain and repair compared to Ball Valves.
    Connection Double flange
    Size 3″-80″ for PN10,PN16,Class150; 3″-48″ for PN25,PN40,Class300; 3″-24″ for Class600
    Pressure PN10,PN16,PN25,PN40,Class150,Class300,Class600
    Flange standard ASME B16.5 Class150,Class300,Class600; EN1092 PN16,PN25,PN40
    Face to face ISO 5752, ASME B16.10, API609 Double flanged short pattern
    Pressure test API 598, ISO 5208 Rate A, ANSI B16.104(ANSI/FCI 70-2)Class Ⅵ
    Temperature -29°C to +538°C
    Operator Lever，Gear box，Pneumatic actuator，Electric actuator

    Triple Offset Butterfly Valves

    No. Part name Material
    1 Body WCB CF8M
    2a Disc WCB,CF8 CF8M
    2b Disc sealing UNS31803(duplex)+graphite
    2c Disc sealing retainer SS304 SS316
    2d Disc sealing retainer screw SS304 SS316
    3 Seat welded surface Stellite Gr.21
    4 Shaft 17-4 PHSS,1.4462
    5 Packing gland CF8
    6 Bottom cover Same as body
    7 Cover seal Graphite
    8 Thrust washer SS316
    9 Bracket WCB CF8M
    10 Retaining ring SS304
    11 Packing RPTFE, Graphite
    12 Packing ring SS316
    13 Bearing SS316+PTFE
    14 Thrust bearing SS316
    15 Key SS316
    16 Bolt SS304
    17 Bolt SS304
    18 Bolt SS304
    19 Nut SS304

    Triple Offset Butterfly Valves

    Triple Offset Butterfly Valves

    SIZE A B C D E Top Flange L WT(kg)
    Class150 PN10 PN16 PN25
    DN INCH Class150,PN10,PN16,PN25
    80 3″ 260 125 17.5 190 200 200 200 14 F07 114 30
    100 4″ 290 141 17.5 230 220 220 235 14 F07 127 40
    125 5″ 310 150 17.5 255 250 250 270 14 F07 140 45
    150 6″ 330 165 18.5 280 285 285 300 17 F10 140 50
    200 8″ 385 214 24.5 345 340 340 360 22 F10 152 85
    250 10″ 425 243 24.5 405 395 405 425 22 F10 165 120
    300 12″ 490 286 30 485 445 460 485 27 F12 178 160
    350 14″ 525 312 30 535 505 520 555 27 F12 190 195
    400 16″ 545 350 39 595 565 580 620 36 F14 216 255
    450 18″ 580 383 49 635 615 640 670 46 F16 222 310
    500 20″ 640 407 49 700 670 715 730 46 F16 229 390
    600 24″ 690 484 60 815 780 840 845 55 F25 267 565
    700 28″ 720 525 130 925 895 910 960 80 F30 292
    750 30″ 750 550 130 985 80 F30 318
    800 32″ 760 600 130 1060 1015 1025 1085 98 F30 318
    900 36″ 795 660 150 1170 1115 1125 1185 120 F35 330
    1000 40″ 815 720 180 1290 1230 1255 1320 130 F35 410
    1050 42″ 850 750 180 1345 150 F35 410
    1200 48″ 995 825 200 1510 1455 1485 180 F40 470
    SIZE A B C D E Top Flange L WT(kg)
    Class300 PN40
    DN INCH Class300,PN40
    80 3″ 260 100 17.5 210 200 14 F07 180 30
    100 4″ 290 124 17.5 255 235 14 F07 190 40
    125 5″ 330 144 18.5 280 270 17 F10 200 60
    150 6″ 350 150 24.5 320 300 22 F10 210 75
    200 8″ 415 204 30 380 375 27 F12 230 115
    250 10″ 455 238 39 445 450 36 F14 250 170
    300 12″ 490 268 39 520 515 36 F14 270 170
    350 14″ 545 294 49 585 580 46 F16 290 315
    400 16″ 575 320 60 650 660 55 F25 310 415
    450 18″ 660 341 60 710 685 55 F25 330 490
    500 20″ 700 383 80 775 755 75 F30 350 600
    600 24″ 785 442 80 915 890 75 F30 390 900
    700 28″ 800 590 150 1035 120 F35 430
    750 30″ 830 600 180 1090 130 F35 450
    800 32″ 860 720 200 1150 170 F40 470
    900 36″ 940 780 200 1270 180 F40 510
    1000 40″ 910 750 250 1240 200 F48 550
    1050 42″ 950 800 250 1290 210 F48 570
    1200 48″ 1000 850 250 1465 220 F48 630
    SIZE A B C D E Top Flange L WT(kg)
    Class600 PN63 PN100
    DN INCH Class600,PN63,PN100
    80 3″ 260 145 17.5 210 215 230 14 F07 180 50
    100 4″ 298 185 24.5 275 250 265 22 F10 190 70
    125 5″ 400 200 30 330 295 315 27 F12 200 90
    150 6″ 420 216 39 355 345 355 36 F14 210 125
    200 8″ 445 265 39 420 415 430 36 F14 230 200
    250 10″ 505 315 49 510 470 505 46 F16 250 315
    300 12″ 600 362 49 560 530 585 46 F16 270 435
    350 14″ 610 390 60 605 600 655 55 F25 290 485
    400 16″ 680 440 60 685 670 55 F25 310 685
    450 18″ 683 460 80 745 75 F30 330 815
    500 20″ 795 526 80 815 75 F30 350 1050
    600 24″ 885 623 940 F35 390 1600
    700 28″
    750 30″
    800 32″
    900 36″
    1000 40″
    1050 42″
    1200 48″

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