DN350-DN500
DN350-DN500
DN350-DN500

DN350-DN500 D343Double flange butterfly valves

Design: BS EN593
Flange: EN1092-1 /GOST 33259-2015
Face to Face: EN558-1-Series 13; Series 14;
Materials: WCB/LCB/LCC/LC1/CF8/CF8M/SS321/SS904L
Briefs
Standards
Optional
Remarks
parameter(Dimension: mm)
Briefs
Triple eccentric design;
Bidirectional type zero leakage
Size rage from DN350—DN 500mm
Pressure rating: PN10 – PN25 from DN350-DN 500mm PN 40 for DN 200-DN 1200mm
Applications: water, hot water, oil and gas etc.
Standards
Design:
BS EN593
Flange:
EN1092-1 /GOST 33259-2015
Face to Face:
EN558-1-Series 13; Series 14;
WCB/LCB/LCC/LC1/CF8/CF8M/SS321/SS904L
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
Flange dimensions as per Gost 33259-2015
Pressure test as per BS EN12266-1
Pressure test PN10 PN16 PN25
Shell 15bar 24bar 37.5bar

Seal
Water 11bar 17.6bar 27.5bar
Air 6bar 6bar 6bar

Media: Water, oil and gas Temperature: -15~350℃ Dimension: mm

Material for main parts
No. Part Name Material No. Part Name Material
1 Cover Q235 7 Disc WCB
2 Body WCB 8 Retainer Q235
3 Bushing Self-     lubricating 9 Packing Graphite
4 Body seat SS304 10 Gland WCB
5 Disc seat SS304+ XB450 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 #
350 10 190 505 429 460 16-Ø22  




4
26 468 295
16 520 429 470 16-Ø26   30 468 295
25 555 448 490 16-Ø33 4-M30 * 38 490 340
400 10 216 565 480 515 16-Ø26   26 508 328
16 580 480 525 16-Ø30   32 540 326
25 620 503 550 16-Ø36 4-M33 * 40 517 368
450 10 222 615 530 565 20-Ø26   28 537 378
16 640 548 585 20-Ø30   34 537 378
25 670 548 600 20-Ø36 4-M33 * 40 562 410
500 10 229 670 582 620 20-Ø26   28 610 378
16 715 609 650 20-Ø33   36 628 400
25 730 609 660 20-Ø36 4-M33 * 44 660 435

The "n" of "n-Ød" is the total number of holes, 4-Mxx means that the 4 holes at stem upper and lower position are threaded holes. "H" and  "H1" for reference only.
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