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CN | EN

Expansion Butterfly Valve

Technical Parameters

Product model: SD341X/SD342X

Nominal diameter: DN50mm-DN2000mm

Nominal pressure: PN0.6MPa~1.6MPa

Applicable medium: water, oil

Applicable temperature: 10℃-80℃

Body material: carbon steel, stainless steel





Product Details

Product Structure Features

The structure principle of expansion butterfly valve is especially applicable to the manufacturing of large-caliber valve. Expansion butterfly valve is not only widely used in petroleum, gas, chemical engineering, water treatment and other general industries, but also used in the cooling water system of thermal power plants.


The Main Structure Features Include

1.Small in size and light in weight, easy disassembly, installation and maintenance, it can be installed wherever needed.

2.Simple and compact structure, low operating torque, 90 degree rotation, and quick opening. 

3.Flow characteristics tend to be linear, with good regulation performance. 

4.The connection between the butterfly plate and the valve rod is pin free, which overcomes possible internal leakage points. 

5.The sealing parts can be replaced, and is reliable, achieving bi-directional sealing. 

6.The valve can be designed of flange connection and clamp connection. 

7.The drive mode can be manual, electric or pneumatic. 


Main external dimensions

Nominal diameter Dimensions (reference value) Flange size and bolt size (standard value)
H H1 Maximum length L Minimum length L
length L 		A B 0.6MPa 1.0MPa 1.6MPa
mm in D D1 D2 n-d D D1 D2 n-d D D1 D2 n-d
50 2 80 309 164 138 151 180 200 140 110 88 4-14 165 125 99 4-18 165 125 99 4-18
65 2-1/2 95 337 190 154 172 180 200 160 130 108 4-14 185 145 118 4-18 185 145 118 4-18
80 3 98 347 195 163 177 180 200 190 150 124 4-18 200 160 132 8-18 200 160 132 8-18
100 4 114 373 227 184 206 180 200 210 170 144 4-18 220 180 156 8-18 220 180 156 8-18
125 5 128 405 254 195 215 180 200 240 200 176 8-18 250 210 184 8-18 250 210 184 8-18
150 6 139 440 240 201 225 270 280 265 225 199 8-18 285 240 211 8-22 285 240 211 8-22
200 8 174 612 265 215 245 400 425 320 280 254 8-18 340 295 266 8-22 340 294 266 12-22
250 10 215 693 295 235 265 400 425 375 335 309 12-18 395 350 319 12-22 405 355 319 12-26
300 12 245 747 308 254 282 450 560 440 395 363 12-22 445 400 370 12-22 460 410 370 12-26
350 14 270 802 325 271 300 450 560 490 445 413 12-22 505 460 429 16-22 520 470 429 16-26
400 16 305 991 345 283 314 535 580 540 495 463 16-22 565 515 480 16-26 580 525 480 16-30
450 18 325 1037 370 314 340 535 580 595 550 518 16-22 615 565 530 20-26 640 585 548 20-30
500 20 360 1127 377 316 346 535 580 645 600 568 20-22 670 620 582 20-26 715 650 609 20-33
600 24 445 1377 446 388 417 570 660 755 705 667 20-26 780 725 682 20-30 840 770 720 20-36
700 28 505 1496 445 395 425 750 660 860 810 772 24-26 895 840 794 24-30 910 840 794 24-36
800 32 560 1584 479 425 455 750 550 975 920 878 24-30 1015 950 901 24-33 1025 950 901 24-39
900 36 630 1676 515 455 485 750 550 1075 1020 978 24-30 1115 1050 1001 28-33 1125 1050 1001 28-39
1000 40 680 1760 525 465 495 900 750 1175 1120 1078 28-30 1230 1160 1112 28-36 1255 1170 1112 28-42
1200 48 795 2018 574 512 542 1000 925 1405 1340 1295 32-33 1455 1380 1328 32-39 1485 1390 1328 32-48
1400 56 900 2363 599 547 572 1000 925 1630 1560 1510 36-36 1675 1530 1530 36-42 1685 1590 1530 36-48
1600 64 1100 2723 640 589 615 1000 925 1830 1760 1710 40-36 1915 1820 1750 40-48 1930 1820 1750 40-56
1800 72 1124 2844 725 670 695 1100 980 2045 1970 1718 44-39 2115 2020 1950 44-48 2130 2020 1950 44-56
2000 80 1292 3127 764 680 722 1100 980 2265 2180 2125 48-42 2325 2230 2150 48-48 2345 2230 2150 48-62


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