The triple eccentric flange butterfly valve is a butterfly valve with a triple eccentric structure design and flange connection. It combines the sealing advantages of the triple eccentric structure with the installation convenience of flange connection. It is widely used in pipeline systems in petroleum, chemical, power, metallurgy and other fields, and is especially suitable for harsh working conditions such as high temperature, high pressure and corrosive media.
GNEE Group specializes in valve manufacturing and offers one-on-one customized services. B2B Valve Solutions – Submit Your Requirements!
Triple Eccentric Flanged Butterfly Valve Technical parameters
Size Range: DN50-DN2000
Material: WCB
Connection Options: Flanged End
Pressure: 1.0Mpa ~ 4.0Mpa
Working Temperature: -29°C to 425°C
Sealing Options: SS304 + Graphite
Applicable Medium: Water, oil, gas, acid
Triple Eccentric Flanged Butterfly Valve Structural Features
Triple Eccentricity Design
- First Eccentricity (Axial Eccentricity): The valve shaft centerline is offset from the valve seat sealing surface centerline, reducing friction during valve opening and closing.
- Second Eccentricity (Radial Eccentricity): The valve shaft centerline is offset from the pipeline centerline, further reducing the contact area between the valve plate and the valve seat.
- Third Eccentricity (Conical Sealing Surface Eccentricity): The valve seat sealing surface is an inclined cone shape, forming linear contact with the valve plate, achieving "zero-friction opening and closing."
Bidirectional Sealing: By adjusting the driving torque, it supports tight closure in both directions, adapting to bidirectional fluid control requirements.
Sealing Structure
Metal Hard Seal: The sealing pair uses stainless steel, hard alloy, and other metal materials, which are resistant to high temperatures, corrosion, and wear.
Soft and Hard Layered Seal: Some models use a combination seal of stainless steel sheet and flexible graphite, combining the advantages of both metal hard seals and elastic seals.
Fireproof Structure: The all-metal design meets fire safety requirements and is suitable for high-temperature environments.
Flange Connections
Supports standard flange connections (such as GB/T 9113, ASME B16.5), facilitating connection with piping systems.
Flexible connection methods include flange, wafer, weld neck, and lug wafer, adapting to different installation requirements.
Triple Eccentric Flanged Butterfly Valve Specification Parameters
| ITEM | PN 0.6 | PN 1.0 | PN 1.6 | PN 2.5 | PN 4.0 |
|---|---|---|---|---|---|
| Nominal Size DN (mm) | 50–2000 | 50–2000 | 50–2000 | 50–2000 | 50–500 |
| Nominal Pressure (MPa) | 0.6 | 1.0 | 1.6 | 2.5 | 4.0 |
| Strength Test Pressure (MPa) | 0.9 | 1.5 | 2.4 | 3.75 | 6.0 |
| Seal Test Pressure (MPa) | 0.66 | 1.1 | 1.76 | 2.75 | 4.4 |
| Gas Seal Test Pressure (MPa) | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
| Leakage | < 0.1 × DN mm³/s (GB/T 13927-92) | ||||
| Suitable Temperature | −29 ~ 425°C (Carbon steel) / −40 ~ 550°C (SS / Cr-Mo) | ||||
| Applicable Medium | Air, water, steam, gas, oil, acid, alkali, salt with weak corrosive media | ||||
| Drive Type | Worm gear / Electric | ||||
Triple Eccentric Flanged Butterfly Valve Standard
| ITEM | STANDARD |
|---|---|
| Manufacturing Standard | JB/T 8527-97 |
| Flange Standard | GB 9113 |
| Face-to-Face Standard | GB 12221-89 |
| Test Standard | GB/T 13927-92 |
Triple Eccentric Flanged Butterfly Valve Main Components Material:
| PART NAME | MATERIAL |
|---|---|
| Body | Carbon steel, stainless steel, chrome molybdenum steel, alloy steel |
| Disc | Carbon steel, alloy steel, stainless steel, chrome molybdenum steel |
| Seat Ring | Stainless steel and high-temperature asbestos combined into multi-layer |
| Stem | 2Cr13, 1Cr13 stainless steel, chrome molybdenum steel |
| Bearing | Austenitic stainless steel, 304 nitrided |
| Packing | Flexible graphite |
Triple Eccentric Flanged Butterfly Valve drawning
Triple Eccentric Flanged Butterfly Valve Main Connection Dimensions:
| PN | DN | L | D | D1 | D2 | n-Ød | b | f | H | H0 | A | B | W (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0 MPa | 50 | 108 | 165 | 125 | 99 | 4-18 | 20 | 2 | 170 | 130 | 45 | 120 | 7 |
| 65 | 112 | 185 | 145 | 118 | 4-18 | 20 | 2 | 170 | 145 | 45 | 120 | 9.2 | |
| 80 | 114 | 200 | 160 | 132 | 8-18 | 20 | 2 | 230 | 152 | 45 | 120 | 11.6 | |
| 100 | 127 | 220 | 180 | 156 | 8-18 | 22 | 2 | 320 | 192 | 45 | 120 | 14 | |
| 125 | 140 | 250 | 210 | 184 | 8-18 | 22 | 2 | 345 | 200 | 45 | 120 | 18 | |
| 150 | 140 | 285 | 240 | 211 | 8-22 | 24 | 2 | 385 | 230 | 66 | 150 | 23 | |
| 200 | 152 | 340 | 295 | 266 | 8-22 | 24 | 2 | 471 | 297 | 85 | 170 | 44 | |
| 250 | 165 | 405 | 355 | 319 | 12-22 | 26 | 2 | 533 | 327 | 85 | 170 | 64 | |
| 300 | 178 | 445 | 400 | 370 | 12-22 | 26 | 2 | 606 | 364 | 106 | 205 | 105 | |
| 350 | 190 | 505 | 460 | 429 | 16-22 | 26 | 2 | 694 | 404 | 106 | 205 | 134 | |
| 400 | 216 | 565 | 515 | 480 | 16-26 | 26 | 2 | 757 | 444 | 130 | 240 | 181 | |
| 450 | 222 | 615 | 565 | 530 | 20-26 | 28 | 2 | 814 | 472 | 155 | 240 | 237 | |
| 500 | 229 | 670 | 620 | 582 | 20-26 | 28 | 2 | 902 | 522 | 169 | 306 | 292 | |
| 600 | 267 | 780 | 725 | 682 | 20-30 | 34 | 2 | 1048 | 590 | 198 | 324 | 421 | |
| 700 | 292 | 895 | 840 | 794 | 24-30 | 34 | 5 | 1277 | 810 | 220 | 335 | 541 | |
| 800 | 318 | 1015 | 950 | 901 | 24-33 | 36 | 5 | 1385 | 844 | 241 | 356 | 658 | |
| 900 | 330 | 1115 | 1050 | 1001 | 28-33 | 38 | 5 | 1490 | 890 | 241 | 356 | 790 | |
| 1000 | 410 | 1230 | 1160 | 1112 | 28-36 | 38 | 5 | 1620 | 950 | 241 | 356 | 890 |
Triple Eccentric Flanged Butterfly Valve Applications
Petrochemical Industry
High-temperature oil and gas pipelines, catalytic cracking units, hydrorefining systems, etc., require corrosion-resistant and high-pressure-resistant media control.
Power Industry
Power plant boilers, steam systems, circulating cooling water pipelines, etc., require valves that are resistant to high temperatures and have reliable seals.
Metallurgical Industry
Blast furnace gas, hot air systems, converter gas pipelines, etc., require valves that can adapt to large-diameter, high-frequency opening and closing conditions.
Marine and Marine Engineering
Seawater cooling systems, fuel oil pipelines, etc., require valves that are resistant to seawater corrosion and have bidirectional sealing performance.
Municipal and Environmental Protection
Urban water supply, sewage treatment, seawater desalination, etc., require valves with large flow regulation and long service life.
Triple Eccentric Flanged Butterfly Valve factory
