The electric triple-eccentric butterfly valve is a long-life, energy-saving type of electric butterfly valve. Its structure is designed using a three-dimensional core-forming principle, and the valve seat employs a multi-layered structure compatible with both hard and soft seals, exhibiting exquisite manufacturing processes. The electric triple-eccentric butterfly valve consists of main components such as the valve body, butterfly plate, multi-layered valve seat, valve stem, and transmission mechanism.
The electric metal-seated butterfly valve is equipped with an angular stroke electric actuator that can directly receive 4-20mA DC or 1-5V DC control signals from computers or industrial instruments. Based on the deviation between the valve position feedback signal and the set value, it intelligently adjusts the step distance of the actuator drive motor (PID control) to achieve precise positioning of the valve or other device opening, while simultaneously outputting a 4-20mA DC position feedback signal.
Therefore, electric metal-seated butterfly valves are widely used in automation control in metallurgy, power, petroleum, chemical, air, gas, combustible gas, and water supply and drainage industries.
GNEE Group is a leading valve manufacturer in China, providing customized services. Global Valve Solutions – Contact Our Experts Now!
electric triple-eccentric butterfly valve Technical parameters
Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance)
Size Range:2″ to 48″ (DN50-DN1200)
Connection Options:Flanged
Working Pressure:Up to 300 psi (20.7 bar)
Working Temperature:-29°C to 200°C
Sealing Options:EPDM, PTFE, Metal-to-Metal, NBR, FKM
Manufacturing Method:Cast, Forged, Machined
Applicable Medium:Water, Oil, Gas, Air, Chemical Fluids
Manufacturing Standard:API 609, ASME B16.47, MSS-SP-67, BS EN 593, ISO 5752
electric triple-eccentric butterfly valve Structure:
Eccentricity Principle
First Eccentricity: The valve shaft is offset from the center of the butterfly plate, reducing friction between the butterfly plate and the valve seat during opening and closing.
Second Eccentricity: The valve shaft is offset from the center of the valve body sealing surface, achieving rapid disengagement during opening and closing.
Third Eccentricity: The valve seat sealing surface is tilted at a certain angle (conical eccentricity), ensuring a line seal between the butterfly plate and the valve seat, forming a metal-to-metal hard seal structure.
Three-Dimensional Eccentricity Effect: Through valve stem axis offset, valve body channel axis offset, and eccentricity angle design, zero-friction contact of the sealing surface is achieved, eliminating mechanical wear and scratches during opening and closing.
Key Components
Butterfly Plate: Made of cobalt-based hard alloy or stainless steel with weld overlay, wear-resistant and corrosion-resistant. Large-size butterfly plates use a truss structure for enhanced strength.
Valve Seat: Multi-stage structure combining metallic and non-metallic materials (such as stainless steel + flexible graphite), adaptable to high temperature, high pressure, and corrosive media.
Sealing ring: A combination of soft and hard layered stainless steel sheets and flexible graphite, combining the characteristics of both hard metal seals and elastic seals, supporting bidirectional self-locking seals.
Drive unit: Supports multiple methods including electric, manual, worm gear drive, and pneumatic operation, and can be installed in multiple positions (rotating 90° or 180°).
electric triple-eccentric butterfly valve Main Component Materials
| Component Name | Material |
|---|---|
| Valve Body | Cast Iron, Stainless Steel, Chromium-Molybdenum Steel, Alloy Steel |
| Butterfly Disc (Plate) | Cast Steel, Alloy Steel, Stainless Steel, Chromium-Molybdenum Steel |
| Seal Ring | Multi-layered combination of Stainless Steel and High-Temperature Asbestos Board |
| Valve Stem (Shaft) | 2Cr13, 1Cr13 Stainless Steel, Chromium-Molybdenum Steel |
| Packing | O-Ring, Flexible Graphite |
electric triple-eccentric butterfly valve Installation connection dimensions
| Nominal diameter (DN) | Size | Flange Size | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | L1 | H | H1 | 1.0MPa | 1.6MPa | 2.5MPa | |||||||
| D | D1 | n-Фd | D | D1 | n-Фd | D | D1 | n-Фd | |||||
| 50 | 108 | 43 | 112 | 530 | 165 | 125 | 4-18 | 165 | 125 | 4-18 | 165 | 125 | 4-18 |
| 65 | 112 | 46 | 115 | 530 | 185 | 145 | 4-18 | 185 | 145 | 4-18 | 185 | 145 | 8-18 |
| 80 | 114 | 46 | 120 | 565 | 200 | 160 | 4-18 | 200 | 160 | 8-18 | 200 | 160 | 8-18 |
| 100 | 127 | 52 | 138 | 600 | 220 | 180 | 8-18 | 220 | 180 | 8-18 | 235 | 190 | 8-22 |
| 125 | 140 | 56 | 164 | 640 | 250 | 210 | 8-18 | 250 | 210 | 8-18 | 270 | 220 | 8-26 |
| 150 | 140 | 56 | 175 | 705 | 285 | 240 | 8-22 | 285 | 240 | 8-22 | 300 | 250 | 8-26 |
| 200 | 152 | 60 | 200 | 775 | 340 | 295 | 8-22 | 340 | 295 | 12-22 | 360 | 310 | 12-26 |
| 250 | 165 | 68 | 243 | 945 | 395 | 350 | 12-22 | 405 | 355 | 12-26 | 425 | 370 | 12-30 |
| 300 | 178 | 78 | 250 | 1070 | 445 | 400 | 12-22 | 460 | 410 | 12-26 | 485 | 430 | 16-30 |
| 350 | 190 | 78 | 280 | 1140 | 505 | 460 | 16-22 | 520 | 470 | 12-26 | 555 | 490 | 16-33 |
| 400 | 216 | 102 | 305 | 1210 | 565 | 515 | 16-26 | 580 | 525 | 16-26 | 620 | 550 | 16-36 |
| 450 | 222 | 114 | 350 | 1335 | 615 | 565 | 20-26 | 640 | 585 | 16-30 | 670 | 600 | 20-36 |
| 500 | 229 | 127 | 380 | 1415 | 670 | 620 | 20-26 | 715 | 650 | 20-30 | 730 | 660 | 20-36 |
| 600 | 267 | 154 | 445 | 1605 | 780 | 725 | 20-30 | 840 | 770 | 20-33 | 845 | 770 | 20-39 |
| 700 | 292 | 165 | 480 | 1844 | 895 | 840 | 24-30 | 910 | 840 | 24-36 | 960 | 875 | 24-42 |
| 800 | 318 | 190 | 530 | 2040 | 1015 | 950 | 24-33 | 1025 | 950 | 24-39 | 1085 | 990 | 24-48 |
| 900 | 330 | 203 | 580 | 2255 | 1115 | 1050 | 28-33 | 1125 | 1050 | 28-39 | 1185 | 1090 | 28-48 |
| 1000 | 410 | 216 | 650 | 2380 | 1230 | 1160 | 28-36 | 1255 | 1170 | 28-42 | 1320 | 1210 | 28-56 |
| 1200 | 470 | 254 | 760 | 2640 | 1455 | 1380 | 32-39 | 1485 | 1390 | 32-48 | 1530 | 1420 | 32-56 |
Electric Actuated Triple Offset Butterfly Valve Application
Petrochemical Industry:
Replaces gate/stop valves for shut-off and regulation in high-temperature, high-pressure pipelines, such as catalytic cracking and hydrocracking units.
Corrosion-resistant materials (e.g., 316L, Hastelloy) are suitable for sulfur-containing oils and acid/alkali media.
Power Industry:
Flow control in boiler feedwater and steam pipelines, withstanding temperatures up to 600℃.
Slurry regulation in desulfurization and denitrification systems; wear-resistant design extends valve life.
Municipal Construction:
Bidirectional regulation of urban heating and water supply networks; low flow resistance reduces energy consumption.
Sludge and exhaust gas regulation in wastewater treatment; sealing performance prevents leakage and pollution.
Special Conditions:
Using stainless steel in cryogenic applications (e.g., LNG storage and transportation), with temperature resistance down to -196℃.
Explosion-proof electric butterfly valves are used for coal mine gas drainage and the storage and transportation of hazardous chemicals.
Electric Actuated Triple Offset Butterfly Valve factory
