Design Features:
Features of double eccentric butterfly valve
The structural feature of the double eccentric butterfly valve is that the shaft center of the valve stem deviates from the center of the valve plate and the center of the body.
The double eccentric effect enables the valve plate to be released from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive squeezing and scratching of the valve plate and the valve seat, reduces the opening resistance, reduces wear and improves The life of the valve seat is improved. The friction between the valve plate and the valve seat is greatly reduced. This structure also allows the double eccentric butterfly valve to use a metal seat, which improves the application of the butterfly valve in the high temperature field.
1 Reasonable design, compact structure, easy assembly and disassembly, and easy maintenance.
2 The eccentric structure is adopted to reduce the friction of the sealing ring and prolong the service life of the valve.
3 Completely sealed, zero leakage. Can be used in ultra-high vacuum conditions.
4 By replacing the material of the valve plate sealing ring, valve plate, rotating shaft, etc., it can be applied to a variety of media and different temperatures.
Field of Application：
Operating Temperature：
According to different valve seats and sealing materials, suitable for different temperatures and media.
Operate:
DN80-DN250: Lever
DN300-1200: Worm gear
Optional operation: Lever, Worm gear, Pneumatic, Electric-Motorized
Application: Chemical processing, Desalination plants, Drinking water, Dry powder, Food and beverage, Gas plants, HAVC Mining industry, Paper industry, Sand handling, Seawater, Sugar industry, Thermo technical water treatment, Waste water, Cooling Water Circulation, Compressed Air.
Technical Specification：
Design Standard:
EN 593, MSS SP67, API 609, BS5155
Face to Face dimension:
ISO 5752, EN 558, MSS SP67, API 609, DIN3202
End Standard:
ANSI B16.1 Class125LB & B16.5 Class150LB
AS 2129 Table D & E BS 10 Table D & E
DIN 2501 PN6, PN10 & PN16
EN 1092 PN6, PN10 & PN16
ISO 2531 PN6, PN10 & PN16
ISO 7005 PN6, PN10 & PN16
KS B 1511 / JIS B 2210 5K & 10K
MSS SP44 CL. 150LB AWWA C207
SABS 1123 Table 1000/3 & Table 1600/3
Top Flange: ISO5211
Test standard: API 598, ISO 5208, EN 12266
MATERIAL LIST
| Material Specification |
| Part Name | Material |
| Body | Cast Iron, Ductile iron, Bronze, Carbon steel, Stainless steel, Cr-Mo steel, Alloy steel |
| Disc | Ductile iron, Carbon steel, Bronze, Stainless steel, Cr-Mo steel, Alloy steel |
| Seal Ring | 316 stainless steel+flexible graphite, Teflon |
| Seat | EPDM, NBR, PTFE, VITON, Rubber, STL, Bronze, Stainless steel, Cr-Mo steel, Alloy steel |
| Stem | 45#, 410, 420, 431, 2Cr13, Stainless steel, Cr-Mo steel |
| Packing | Flexible graphite, Teflon |
| Note： | Carbon steel：WCB |
| Cr-Mo steel: ZG1Cr5Mo, ZG20GrMo and so on |
| Stainless steel: CF8, CF8M, CF3, CF3M |
| Alloy steel: WC6, WC9 and so on |
