Figure 8 or Spectacle Blind, is made by a steel spade and spacer, united by a welded handle. Spectacle Blind may have a different type of joint face (RF Raised Face, FF Flat Face, RTJ Ring Joint), depending the type of flange.
The Spectacle Blind is usually used on the oil line with two different functions:
The Spectacle Blind is inserted between two flanges: in order to guarantee a perfect waterlight two gaskets are normally mounted , one on each side of spectacle blind.
Here you can see our Spectacle Blind datasheets of the major dimensional standards.
SPECTACLE BLIND DATASHEETS: