The useage of spectactle blind flange
In the project, sometime we will use spectactle blind flange, it is named for its shape like Chinese number “8”. It has a blind plate at one end and a throttle ring at other end. Installed in the pipeline, when using the fluid, use one end of the throttle ring. When cutting off, use one end of the blind plate, which is similar to the function of the shut-off valve. The spectactle blind flange can be used to cut off the medium when the valve leaks, and the sealing performance is reliable. It is a reliable means of isolation. Another feature of the eight-character blind is that the logo is obvious and it is easy to identify the state of its installation. Compared with the gate valve, it is cut off with a splayed blind plate, and no misoperation will occur.
The installation position of the spectactle blind flange:
1. Separation of system-type media pipelines, such as steam and oil-based media pipelines. The spectactle blind flange is installed once near the system medium pipe for the purpose of easy on-line disassembly, and the side of the process medium pipe also needs to be installed with a gate valve. Generally, in this kind of pipeline, the eight-character blind board is always closed.
2. There is a flammable or toxic medium in the inlet and outlet device. It is necessary to install a double gate valve, and the spectactle blind flanges is normally open.
3, the device is installed in the pipeline, after driving normally no longer through the medium, to install the gate valve, the spectactle blind flange installed in the normal medium circulation pipe once. The flag is always closed.