Spectacle blind
A spectacle blind is an integral assembly with a solid blank and an open spacer connected by a web, repositioned between two flanges to change line state. Its connected geometry provides visible indication and distinguishes it from separate paddle-blind and paddle-spacer pieces. Thickness, facing, dimensions, material and safe changeover procedure must be specified for the actual joint.
Application and duty
Positive line isolation using a connected open-and-closed assembly with a controlled changeover procedure