Product variants

DN3000 Double Eccentric Butterfly Valve

Size Range: DN50-DN4000
Pressure: PN6/10/16/25/40 Mpa 150/300 Class
Body Materials: Ductile Iron、Carbon Steel、Stainless Steel、Duplex Steel
Seat Materials: EPDM/PTFE
Disc Seat Ring: NBR、EPDM、PTFE
Shaft: Austenitic stainless steel、Martensitic stainless steel、Duplex steel、Super duplex steel
Disc: Ductile Iron、Carbon Steel、Stainless Steel、Duplex Steel
Applicable medium: Air,water,sea water,sewage,gas,oil,etc.
Proper temperature: -29℃~120℃;-29℃~425℃
Drive mode: Worm gear、pneumatic、hydraulic、electric

Advantages of double eccentric butterfly valve
(1). Valve opening and closing torque is small
Due to the existence of eccentricity, when the valve is closed, the sealing surface is a process of gradually entering and exiting, thus reducing the mechanical wear and extrusion between the sealing surfaces.
(2). Sealing specific pressure can be adjusted
When the valve is used for a period of time or loosened during transportation, it can be pressurized to ensure the sealing requirements.
(3). Seals are field replaceable
The rubber sealing ring is installed on the butterfly plate and can be replaced online.
(4). long lasting
The contact between the sealing ring and the valve seat is a coincident seal, and there is no mechanical wear and extrusion, so the sealing ring of the double eccentric butterfly valve has a long service life.
(5). Conditions of Use
It is suitable for large-scale installations and pipelines in drainage, heating, gas systems, chemical power generation, metallurgy and other industries.
(6). With two-way sealing performance With two-way
Sealing performance, especially suitable for working conditions where the medium requires both forward flow and reverse flow (please specify when ordering).

Double eccentric design principle and characteristics
The butterfly valve has a double eccentric soft seal structure, that is, the eccentric distance from the center of rotation of the butterfly plate to the sealing section a of the valve body, and the distance from the center of rotation of the butterfly plate to the center line of the valve body b, (see the figure below). The valve adopts worm gear transmission deceleration (electric valve is decelerated by motor through worm gear transmission), and the valve shaft drives the butterfly plate to rotate within 90°C, so that the butterfly plate is in the open or closed state to achieve the purpose of connecting or cutting off the medium. As shown in the figure, when the valve is closed, the sealing ring is squeezed by the sealing surface of the valve body and the butterfly plate, resulting in deformation.

Features of double eccentric butterfly valve:
(1) It has two-way sealing performance, especially suitable for the working conditions where the medium has both forward flow requirements and reverse flow requirements (please specify when ordering);
(2) Double eccentric sealing structure is adopted, which has the function of getting tighter and tighter when closing, and the sealing performance is reliable.
(3) The butterfly plate adopts a streamlined structure with high strength, large flow area and small flow resistance;
(4) Change the material of the valve body, the sealing ring is located on the butterfly plate, and the material of the sealing ring can be changed to apply to different media;
(5) The worm gear drive is fully enclosed and flexible in operation.
(6) The electrical device is an imported integrated product, which can be controlled locally or remotely, and the control is safe and reliable.

Soft Seal Butterfly Valve – Disc Seal

 

 
Soft Seal Butterfly Valve – Body Seal

 
 
Hard Seal Butterfly Valve
 
DATA
 

Size Outline dimensions Flange dimensions EN1092-2
DN L H1 H2 PN6 PN10 PN16
Inch mm Series13 Series14 D K b n-Φd D K b n-Φd D K b n-Φd
2 50 108 150 83 306 140 110 16 4-14 165 125 19 4-19 165 125 19 4-19
2-1/2 65 112 170 93 321 160 130 16 4-14 185 145 19 4-19 185 145 19 4-19
3 80 114 180 100 346 190 150 18 4-19 200 160 19 8-19 200 160 19 4-19
4 100 127 190 110 387 210 170 18 4-19 220 180 19 8-19 220 180 19 8-19
5 125 140 200 125 411 240 200 20 8-19 250 210 19 8-19 250 210 19 8-19
6 150 140 210 143 447 265 225 20 8-19 285 240 19 8-23 285 240 19 8-23
8 200 152 230 170 607 320 280 22 8-19 340 295 20 8-23 340 295 20 12-23
10 250 165 250 193 688 375 335 24 12-19 395 350 22 12-23 405 355 22 12-28
12 300 178 270 223 742 440 395 24 12-23 445 400 24.5 12-23 460 410 24.5 12-28
14 350 190 290 253 797 490 445 26 12-23 505 460 24.5 16-23 520 470 26.5 16-28
16 400 216 310 283 930 540 495 28 16-23 565 515 24.5 16-28 580 525 28 16-31
18 450 222 330 308 975 595 550 28 16-23 615 565 25.5 20-28 640 585 30 20-31
20 500 229 350 335 1065 645 600 30 20-23 670 620 26.5 20-28 715 650 31.5 20-34
24 600 267 390 390 1225 755 705 30 20-26 780 725 30 20-31 840 770 36 20-37
28 700 292 430 448 1343 860 810 32 24-26 895 840 32.5 24-31 910 840 39.5 24-37
32 800 318 470 508 1463 975 920 34 24-31 1015 950 35 24-34 1025 950 43 24-40
36 900 330 510 558 1616 1075 1020 36 24-31 1115 1050 37.5 28-34 1125 1050 46.5 28-40
40 1000 410 550 615 1711 1175 1120 36 28-31 1230 1160 40 28-37 1255 1170 50 28-43
48 1200 470 630 728 1971 1405 1340 40 32-34 1455 1380 45 32-40 1485 1390 57 32-49
56 1400 530 710 838 2218 1630 1560 44 36-37 1675 1590 46 36-43 1685 1590 60 36-49
64 1600 600 790 958 2578 1830 1760 48 40-37 1915 1820 49 40-49 1930 1820 65 40-56
72 1800 670 870 1058 2689 2045 1970 50 44-40 2115 2020 52 44-49 2130 2020 70 44-56
80 2000 760 950 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62
88 2200 800 1000 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62
96 2400 850 1100 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62
104 2600 900 1200 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62
112 2800 950 1300 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62
120 3000 1000 1400 1163 3022 2265 2180 54 48-43 2325 2230 55 48-49 2345 2230 75 48-62

Electric Three-Eccentric Metal Hard Seal Butterfly Valve

Size Range: DN40~DN2000
Pressure Rating: 0.6MPa~4.0MPa
Material: SS304, SS316,Ductile Iron/WCB
Design Standard: EN 593, MSS SP67, API 609, BS5155
Application medium: Water, Oil and gas
Application Temperature: -10 °C ~150°C

Motorisable butterfly valve features
1.Protection of gearbox IP 68-8 (submersion up to 8 m of water) and actuator IP 68 (submersion up to 8 m of water, during 96 hours and 10operations)
①With position indicator.
②Clockwise Close (CC).
③For installation above ground and in non-flooded chambers.
④Designed and tested to an endurance level of 2500 cycles minimum, inaccordance with EN 1074-1 and 2.
⑤Supplied with a handwheel.

2.Reduces resilient seal’s wear and tear ensuring detachment from the body seat ring the moment the valve begins to open.
①reduces pressure loss in fully open position by the disc
②parking in a zone of reduced flow.
③lower torque requirement to rotate the disc leads to less
④wear and longer life of the gasket and other elements.

Motorisable butterfly valve  Application
1.potable water supply pipelines and treatment plants.
2.transportation of filtered and recycled water.
3.irrigation distribution networks.
4.water-pumping stations and hydroelectric plants.
5.nuclear industry, fire safety and storage facilities.

 
DATA
INCH H DD343H DD643H PN1.6Mpa PN2.5Mpa
H1 A1 B1 H2 A2 B2 D1 D1 Z-d D1 D1 Z-d
1-1/2″ 107 330 180 200 625 245 72 150 110 4-18 150 110 4-18
2” 112 350 180 200 625 245 72 165 125 4-18 165 125 4-18
2-1/2″ 115 370 180 200 625 245 72 185 145 4-18 185 145 8-18
3” 120 380 180 200 645 245 72 200 160 8-18 200 160 8-18
4” 138 420 180 200 715 355 92 220 180 8-18 235 190 8-22
5” 164 460 180 280 800 355 92 250 210 8-18 270 220 8-26
6″ 175 555 270 425 850 355 92 285 240 8-22 300 250 8-26
8″ 200 760 400 560 925 250 170 340 295 12-22 360 310 12-26
10″ 243 830 400 560 1035 250 170 405 355 12-22 425 370 12-30
12″ 250 895 450 580 1070 450 200 460 410 12-22 485 430 16-30

WCB Flanged Eccentric Butterfly Valve

Size Range: DN50-DN600
Pressure: PN10/16/150LB
Body Materials: WCB
Seat Materials: EPDM
Disc Materials: WCB
Stem Materials: 2Cr13

Features
Working temperature: 0~80℃
Suitable medium: Water, weak acid base, gas, oil, etc
Application field: Food, medicine, chemical industry, environmental protection, water treatment, water supply and drainage

Product Identification
Double eccentric butterfly valve is further improved on the basis of single eccentric butterfly valve. The structure is characterized by that the valve stem axis deviates from both the disc center and the body center. Double eccentric effect enables the butterfly plate to leave the ate seat aft The valve is opened, greatly eliminating unnecessary excessive squeezing and scraping between the butterfly plate and the seat, reducing the opening resistance distance, reducing wear and increasing the life of the seat.

Double eccentric butterfly valve is mainly used in water works, power plants, steel smelting, chemical engineering, water source engineering, environmental facilities construction and other systems for drainage.Compared with the center line butterfly valve, gh double valhi ly eccentric ist butterf pressure, longer life and better stability.

Product Advantages

1. Precision casting valve body. Qualified WCB material. Fine appearance, no sand hole.
2. Heavy valve body. Wall thickness meets the requirements of GB26640 to ensure compressive strength.
3. The valve body and inner parts are processed by CNC precision machine with high precision.
4. Different sealing materials can be selected to ensure the sealing surface wear resistance, erosion resistance, corrosion resistance, long service life.
5. Replaceable disc seal ring can be easily replaced.
6. The valve shaft is supported by self-lubricating sleeve bearings, which can reduce the friction produced during valve shaft transmission and reduce torque.
7. Each valve will be inspected for shell and seal pressure before leaving factory.
8. Epoxy coating, beautiful apperance.
 
DATA
Parameter Information:

Executive standard:
Name Design and manufacture Face to face Length Pressure Test  End  Flange 
Reference standard GB/T 12238 GB/T 12221 GB/T 13927 GB/T 9113/ASME B16.5
Material of Main Parts:
Name 8-Body 4-Seat Seal 6-Disc 3-Shaft 14-Gearbox
Material WCB EPDM WCB 2Cr13 Component

 

Size   PN10 PN16 150LB
DN NPS (Inch) L φk N-φd φk N-φd φk N-φd
50  2” 108 125 4-18 125 4-18 120.7 4-19
65  2  1/2” 112 145 4-18 145 4-18 139.7 4-19
80  3” 114 160 8-18 160 8-18 152.4 4-19
100  4” 127 180 8-18 180 8-18 190.5 8-19
125  5” 140 210 8-18 210 8-18 215.9 8-22.4
150  6” 140 240 8-22 240 8-22 241.3 8-22.4
200  8” 152 295 8-22 295 12-22 298.4 8-22.4
250  10” 165 350 12-22 355 12-26 361.9 12-25.4
300  12” 178 400 12-22 410 12-26 431.8 12-25.4
350  14” 190 460 16-22 470 16-26 476.2 12-28.4
400  16” 216 515 16-26 525 16-30 539.7 16-28.4
450  18” 222 565 20-26 585 20-30 577.8 16-31.8
500  20” 229 620 20-26 650 20-33 635 20-31.8
600  24” 267 725 20-30 770 20-36 749.3 20-35.1