Spectacle Blind

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:

• If the spade is put in between the flanges, it stops the fluid’s passage;
• If the spacer is put in between the flanges, the passage of the fluid is allowed.

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.

La Meccanica Padana manufactures Spectacle Blinds from 1/2" to 60" in different types of material as follow:

• Carbon steel (ASTM 105, A516 Gr. 60/65/70, A350 LF2, A694 F60-65)
• Stainless steel (AISI 304, 316, 321, 347)
• Alloy steel (AISI Gr.1, Gr.5, Gr.9, Gr.91, Gr.11, Gr.22)
• Nickel alloys
• Duplex/Super duplex (F51, F53, F55, F44)
• Incoloy (800, 800H, 800HT, 825), Alloy 20
• Hastelloy (C22, C276) 
• Cupronickel Cu-Ni
• Monel 400
• Inconel (600m 625)
• Titanium (Gr. 1, 2, 3)

SPECTACLE BLIND DATASHEETS:

Here you can see our Spectacle Blind datasheets of the major dimensional standards.