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Flange center plate butterfly valve(Worm Gear)

Technical Parameters

Fluid medium: Water, oil, gas and various corrosive media
Temperature Range: -10～150℃
Pressure Ratings: PN1.0～1.6MPa
Size Range: DN50～DN1400
Connection Type: Flanged
Connection standard: GB·ANSI·DIN·API·ISO·BS
Body Materials: Cast iron；Ductile iron
Valve seat material: Rubber
Valve plate material: Stainless steel;Ductile iron
Note: All parts can be made of different materials according to actual working conditions.

Product Details

Technical Standard

1.Device for regulating or cutting off medium in pipeline.
2.Suitable for handle control device (DN50~300), worm gear, electric and pneumatic control device.
3.Design and manufacturing standards in line with GB/T12238.
4.Pressure test conforms to GB/T13927.
5.Structure length is GB/T12221.
6.Side flange standard conforms to GB/T17241.6.


Product Features

1.Can be equipped with a handle, worm gear, electric or pneumatic control device.
2.Reduce the rotational torque, support the stem, and make it separate from the valve body effectively, reduce the wear of the valve stem.
3.After polishing treatment, with the valve seat precision.
4.To achieve zero leakage requirements of air tightness test. The opening and closing torque is small, prolong the service life of the valve seat.
5.Stem seal is not easy to deform, thereby avoiding the usual stem leakage.
6.The utility model has the advantages of high precision and high strength, and is suitable for the installation of the handle and other control devices.
7.The utility model is characterized in that the valve rod and the valve plate are firmly connected with the valve plate, and the utility model has the characteristics of anti vibration and easy replacement.
8.High precision, high reliability, easy to control the opening and closing of the valve plate.
9.Good overall stability, stable, tensile, anti leakage.
10.Auxiliary shaft end leakage.


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Main overall connection dimensions（PN1.0/1.6MPa）

DN L D D1 D2 b f N-d0 A K E F H H1 H2 Φ2 N-d1
50 108 165 125 102 18 3 4-Φ18 180 65 50 13 83 338 28 12.6 4-Φ7
65 112 185 145 122 18 3 8-Φ18 180 65 50 13 93 358 28 12.6 4-Φ7
80 114 200 160 138 20 3 8-Φ18 245 65 50 13 100 413 28 12.6 4-Φ7
100 127 220 180 158 20 3 8-Φ18 240 90 70 13 114 428 28 15.77 4-Φ10
125 140 250 210 188 22 3 8-Φ18 240 90 70 13 125 444 28 18.92 4-Φ10
150 140 285 240 212 22 3 8-Φ22 350 90 70 13 143 553 28 18.92 4-Φ10
200 152 340 295 268 24 3 12-Φ22 350 125 102 13 170 678 38 22.1 4-Φ12
250 165 405 355 320 26 3 12-Φ26 550 125 102 13 198 742 38 28.45 4-Φ12
300 178 460 410 378 28 4 12-Φ26 600 125 102 20 223 803 38 31.6 4-Φ12
350 190 520 470 438 30 4 16-Φ26 600 150 125 20 270 866 45 31.6 4-Φ14
400 216 580 525 490 32 4 16-Φ30 600 175 140 20 300 940 51 33.15 4-Φ18
450 222 640 585 550 40 4 20-Φ30 750 175 140 20 340 995 51 37.95 4-Φ18
500 229 715 650 610 44 4 20-Φ33 750 175 140 22 355 1058 57 41.12 4-Φ18
600 267 840 770 725 54 5 20-Φ36 750 210 165 30 410 1163 70 50.63 4-Φ22
700 292 910 840 795 40 5 24-Φ36 750 300 254 30 478 1283 66 63.35 8-Φ18
800 318 1025 950 900 42 5 24-Φ39 750 300 254 30 529 1398 66 63.35 8-Φ18
900 330 1125 1050 1000 44 5 28-Φ39 1250 300 254 34 584 1498 118 75 8-Φ18
1000 410 1255 1170 1115 46 5 28-Φ42 1500 300 254 34 357 1608 142 85 8-Φ18
1200 470 1485 1390 1330 52 5 32-Φ48 1500 350 298 34 799 1876 150 105 8-Φ22


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Shanghai Lidun Valve Manufacturing Co., LTD

Add: No. 175, Lane 250, Fangde Road, Jiading District, Shanghai

Tel: +86-21-51863336

Fax: +86-21-34677003

E-mail: shldv@139.com

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Fujian plant site：2233 Maosheng Road, Nan 'an City, Fujian Province

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