butterfly valves DN 200-DN 500
butterfly valves DN 200-DN 500
butterfly valves DN 200-DN 500
butterfly valves DN 200-DN 500
butterfly valves DN 200-DN 500

Double flange double offset butterfly valves DN 200-DN 500

Design: BS EN593
Flange: EN1092-1 GOST 33259-2015
Face to Face: EN558-1-Series 13; Series 14;
Materials: Body and disc : GGG40/GGG50/WCB or other as request
Briefs
Standards
Optional
Remarks
parameter(Dimension: mm)
Briefs
Double-offset flanged butterfly valve according to the BS EN 593 standard.
Long service life, and due to the wear-resistant, corrosion- and infiltration-proof seat with weld overlay.
Suitable for use in water distribution, water treatment, in pretreated waste water, dams, in power plants, industry and in pressure management. 
Double eccentric design ;
Bidirectional type zero leakage
Good flow regulating function and sealing performance.
Different seat designs satisfy various service conditions
The disc can move away from the seat fast and prolong the valve life.
Simple in structure, and convenient in mounting, dismounting and change.
Size rage from DN200—DN 3200mm
Pressure rating: PN2.5 – PN25
Standards
Design:
BS EN593
Flange:
EN1092-1 /GOST 33259-2015
Face to Face:
EN558-1-Series 13; Series 14;
Materials:
Body and disc : GGG40/GGG50/WCB or other as request
Optional
Electric actuator / pneumatic actuator/ bare shaft / gearbox +ready flange
Remarks
Design and manufacture as per BS EN593
Face to face dimensions as per BS EN558 Series 13/14
Flange dimensions as per BS EN1092-2
Pressure test as per BS EN12266-1
Pressure test PN10 PN16
Shell 15bar 24bar
Seal Water 11bar 17.6bar
Air 6bar 6bar

Media: Water, oil and gas Temperature: -5~80℃ Dimension: mm

Material for main parts:
No. Part Name Material No. Part Name Material
1 Cover Q235 7 Disc Ductile iron
2 Body Ductile iron 8 Retainer Q235
3 Bushing Self-     lubricating 9 Packing Graphite
4 Body seat SS304 10 Gland WCB
5 Disc seat EPDM 11 Yoke WCB
6 Stem 2Cr13 12 Gear box Ductile iron
parameter(Dimension: mm)
DN PN LF D D0 D1 n-Ød f b H # H1 #
200 10 152 230 340 266 295 8-Ø23
3
20 326 188
16 340 266 295 12-Ø23 20 326 188
250 10 165 250 395 319 350 12-Ø23 22 354 214
16 405 319 355 12-Ø28 22 370 225
300 10 178 270 445 370 400 12-Ø23




4
24.5 418 258
16 460 370 410 12-Ø28 24.5 440 275
350 10 190 290 505 429 460 16-Ø23 24.5 453 285
16 520 429 470 16-Ø28 26.5 460 290
400 10 216 310 565 480 515 16-Ø28 24.5 512 308
16 580 480 525 16-Ø31 28 540 315
450 10 222 330 615 530 565 20-Ø28 25.5 536 334
16 640 548 585 20-Ø31 30 565 361
500 10 229 350 670 582 620 20-Ø28 26.5 590 360
16 715 609 650 20-Ø34 31.5 632 365

#         "H" and  "H1" for reference only.
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