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Large Diameter Hard-Seated Flanged Butterfly Valve

Large Diameter Hard-Seated Flanged Butterfly Valve
  • Nominal Diameter: DN400‑DN2000 (16″‑80″)
  • Nominal Pressure: PN10‑PN40 (Class 150‑Class 300)
  • Operation: Handwheel, Gear Operator
  • Body Material: WCB, WC6, 304, 316L, Hastelloy‑C, Alloy 20, 2205, 2507, 904L, 310S, TA2
  • Seat Material: Multi‑layer Metal‑to‑Metal Seal
  • Manufacturing Standards: JB/T8527‑97, GB/T12238‑2008, ISO10631‑1994, BS EN593‑2004, MSS SP‑68, API 609
  • Flange Standards: ASME B16.5, JIS B2220, EN1092‑1, HG/T 20592
  • Operating Temperature: -29°C ~ 600°C (depending on body and seat materials)
  • Suitable Media: Water, Air, Steam, Oil Products, Natural Gas, Flue Gas, Dust and Particle‑containing Media
For technical drawings and 3-D models, click on a part number.

Product details

The large‑diameter hard‑seated flanged butterfly valve adopts a triple‑eccentric multi‑layer metal sealing structure and flanged connection, specially designed for large‑size and high‑flow industrial pipelines. Featuring rigid body construction, wear resistance and high temperature resistance, the valve realizes friction‑free opening and closing with long service life and reliable shut‑off & throttling performance.

Working Principle of Large‑Diameter Multi‑layer Hard‑Seated Flanged Butterfly Valve：
Valve Opening: Operate the lever, gear operator or actuator to rotate the valve stem, which drives the butterfly disc. As the disc gradually turns to a position parallel to the pipeline flow direction, the flow passage area increases and medium resistance decreases. When the disc rotates to approximately 90°, the valve reaches the fully‑open state, and the medium can pass through the valve body passage.

Valve Closing: Rotate the valve stem in the reverse direction to drive the butterfly disc toward a position perpendicular to the pipeline flow direction. The disc gradually engages with the metal hard‑seated seat, forming a reliable metal‑to‑metal seal at the closed position so as to cut off the medium inside the pipeline.

Product Specifications

Manual butterfly valves are widely used in industrial piping systems for fast and reliable flow isolation and regulation. Key parameters including working temperature, medium, pressure rating, valve size and connection standard should be confirmed before ordering for proper valve selection. Customized valve sizes, pressure ratings, connection types, sealing materials and body materials are available for diverse industrial and non-standard applications. (Unit: mm)

Large Diameter Flanged Butterfly Valve – PN10-PN40

DNinType/ClassPart NoLD1D2DZ-φdHHoAB
400 16 LD343-PN10LD343P10XLX216 515 480 565 16-26340 1070 440 420
450 18 LD343-PN10LD343P10XLX222 565 530 615 20-25380 1140 540 437
500 20 LD343-PN10LD343P10XLX229 620 582 670 20-26410 1200 540 437
600 24 LD343-PN10LD343P10XLX267 725 682 780 20-30470 1340 540 437
700 28 LD343-PN10LD343P10XLX292 840 794 895 24-30550 1600 640 526
800 32 LD343-PN10LD343P10XLX318 950 901 1015 24-33640 1780 640 526
900 36 LD343-PN10LD343P10XLX330 1050 1001 1115 28-33710 1920 740 600
1000 40 LD343-PN10LD343P10XLX410 1160 1112 1230 28-36770 1960 740 600
1200 48 LD343-PN10LD343P10XLX470 1380 1328 1455 32-39890 2360 740 600
1400 56 LD343-PN10LD343P10XLX530 1590 1530 1675 36-42980 1540 810 890
1600 64 LD343-PN10LD343P10XLX600 1820 1750 1915 40-481150 1670 810 890
1800 72 LD343-PN10LD343P10XLX670 2020 1950 2115 44-481230 1870 830 930
2000 80 LD343-PN10LD343P10XLX760 2230 2150 2325 48-481300 2120 850 940
400 16 LD343-PN16LD343P16XLX216 525 480 580 16-30340 1070 440 420
450 18 LD343-PN16LD343P16XLX222 585 548 640 20-30380 1140 540 437
500 20 LD343-PN16LD343P16XLX229 650 609 715 20-33410 1200 540 437
600 24 LD343-PN16LD343P16XLX267 770 720 840 20-36470 1340 540 437
700 28 LD343-PN16LD343P16XLX292 840 794 910 24-36550 1600 640 526
800 32 LD343-PN16LD343P16XLX318 950 901 1025 24-39640 1780 640 526
900 36 LD343-PN16LD343P16XLX330 1050 1001 1125 28-39710 1920 740 600
1000 40 LD343-PN16LD343P16XLX410 1170 1112 1255 28-42770 1960 740 600
1200 48 LD343-PN16LD343P16XLX470 1390 1328 1485 32-48890 2360 740 600
1400 56 LD343-PN16LD343P16XLX530 1590 1530 1690 36-48980 1530 810 890
1600 64 LD343-PN16LD343P16XLX600 1820 1750 1930 40-561150 1670 810 890
400 16 LD343-PN25LD343P25XLX216 550 503 620 16-36350 1330 540 437
450 18 LD343-PN25LD343P25XLX222 600 548 670 20-36380 1140 540 437
500 20 LD343-PN25LD343P25XLX229 660 690 730 20-36410 1200 540 437
600 24 LD343-PN25LD343P25XLX267 770 720 845 20-39470 1340 540 437
700 28 LD343-PN25LD343P25XLX292 875 820 960 24-42550 1600 640 526
800 32 LD343-PN25LD343P25XLX318 990 928 1085 24-48640 1780 640 526
900 36 LD343-PN25LD343P25XLX330 1090 1028 1185 28-48710 1920 740 600
1000 40 LD343-PN25LD343P25XLX410 1210 1140 1320 28-56780 1960 740 600
300 12 LD343-PN40LD343P40XLX178 450 515 16-33283 908 450 420
350 14 LD343-PN40LD343P40XLX190 510 580 16-36310 964 450 420
400 16 LD343-PN40LD343P40XLX216 585 660 16-30350 1330 540 437

With a wide range of DN400‑DN2000 nominal diameter and excellent pressure & temperature adaptability, it suits harsh working conditions including dust, particles and flue gas. It is widely applied in water supply, heating, power generation, petrochemical, metallurgy and large industrial pipeline systems.