Description
Spectacle blind are used to isolate or connect piping systems.
It is a steel plate, divided into two discs. The two discs are connected by flat steel, one of which is a solid disc and the other is a hollow ring, the inner diameter of which is consistent with the flange.
Technical data sheet
| inch | Nominal diameter | 10kg=l. 0MPa | ||||
| outer diameter | Bolt hole distance | Bolt diameter | Bolt hole number | Flange thickness | ||
| 3/8 | DN10 | 50 | 60 | 14 | 4 | 14 |
| 1/2 | DN15 | 59 | 65 | 14 | 4 | 14 |
| 3/4 | DN20 | 105 | 75 | 14 | 4 | 16 |
| 1 | DN25 | 115 | 85 | 14 | 4 | 16 |
| 1¼ | DN32 | 140 | 100 | 18 | 4 | 18 |
| 1½ | DN40 | 150 | 110 | 18 | 4 | 18 |
| 2 | DN50 | 165 | 125 | 18 | 4 | 20 |
| 2½ | DN65 | 185 | 145 | 18 | 4 | 20 |
| 3 | DN80 | 200 | 160 | 18 | 8 | 20 |
| 3½ | DN100 | 220 | 180 | 18 | 8 | 22 |
| 4 | DN125 | 250 | 210 | 18 | 8 | 22 |
| 5 | DN150 | 285 | 240 | 22 | 8 | 24 |
Characteristic
Spectacle blind is usually in the open position to allow fluid to pass through the pipe. When the spectacle blind is in the closed position, the pipeline is closed and the fluid is blocked.
There is a drill hole on the connecting web of the spectacle blind plate. Loosen and remove some bolts, and the spectacle blind plate can rotate between the flanges.
Application
Spectacle blind is widely used in petroleum, chemical industry, nuclear power station, food manufacturing, construction, shipbuilding, paper making, medicine and other industries.
