Closed Three-Eccentric Center Metal Sealing Butterfly Valve
Butterfly valves achieve on/off and control fluid passage function with circular disc as a start & stop part accompany stem rotating. The feature of simple structure, small volume, light weight, small driving moment, easy to operate etc. To exert excellent function and shutoff sealing reliably. Applicable to the transfer system of gas and fluid in district heating, main pipeline system, metallurgy, light industry, chemical industry, electric power, oil, natural gas, coal gas, food, medication, water supply & drainage pipe and special field widely. Butterfly valve is the leading type of valves. The high performance closed three-eccentric center metal sealing butterfly valve meet the special and severe service condition. Operating temperature ranges -196~600℃.
1. According to material and structure, the series of butterfly valves could meet high temperature, strong erosion, long service life etc.
2. Small volume, light weight. Compared with gate valve with the same pressure and dimension, the weight of butterfly valve reduced by 30%~50%.
3. Structure simply, start & stop rapidly. Few parts, compact structure. Only need to rotating the disc 90° when start & stop.
4. The series of three-eccentric center hard butterfly valve produced by BVMC work both as control and as regulating valve. It feature excellent sealing and controlling performance.
5. Small flow resistance and operating torque.
| No. | QTY | Name | Material | |
| 1 | 1 | Body | Carbon-steel, WCB/A105 | Stainless steel, CF8/304/CF8M/316 |
| 2 | 1 | Gland | Carbon-steel, A105+ENP/Stainless steel, SS | Stainless steel, CF8/304/CF8M/316 |
| 3 | 1 | Disc | Stainless steel, CF8/304/CF8M/316 | |
| 4 | 1 | Seat | SS+STL, INCONEL625, INCONEL825 | |
| 5 | 1 | Plate | Carbon-steel, WCB/A105/Stainless steel, SS | |
| 6 | 1 | Gland | Carbon-steel, WCB/A105+ENP | Stainless steel, CF8/304/CF8M/316 |
| 7 | 1 | Plate | Carbon-steel, WCB/A105 | Stainless steel, CF8/304/CF8M/316 |
| 8 | 1 | Stem | Stainless steel, ASTM A564 630 (17-4PH) | |
| 9 | 2 | Bolt | Stainless steel, SS | |
| 10 | 2 | Screw | Stainless steel, SS | |
| 11 | 3 | Pin | Stainless steel, SS | |
| 12 | 1 | Bearing | SS+PTFE/316 chromeplate | |
| 13 | 1 | Bearing | SS+PTFE/316 chromeplate | |
| 14 | 1 | Gasket | SS+graphite | |
| 15 | 1 | Gasket | SS+graphite | |
| 16 | - | Packing | V type PTFE/graphite/formed graphite | |
| 17 | 2 | Stud | ASTM A193 B7 | ASTM A193 B8M |
| 18 | 2 | Nut | ASTM A194 2H | ASTM A194 8M |
| 19 | - | Stud | ASTM A193 B7 | ASTM A193 B8M |
| 20 | - | Bolt | SS304/SS316 | |
| 21 | - | Stud | ASTM A193 B7 | ASTM A193 B8M |
| 22 | - | Nut | ASTM A194 AH | ASTM A194 8M |
| 23 | 1 | Yoke | CS | CS |
