Line blinds are safety devices designed for positive shut-off of piping, equipment or storage tanks where positive shut-off is defined as a device in a closed, drop-tight, verifiable, and maintainable position. This positive shut-off feature makes line blinds perfectly attuned for permanent or long-term piping system isolation and shutdown.
Advantages of Line Blinds
- Quickly isolates lines compared to spectacle blinds
- Saves money on labor and equipment when isolating systems
- Zero-leakage compared to some isolation valves
Quick Action Line Blinds Save Time and Money

Strahman Line Blinds
Strahman’s AMERICAN MADE line blinds come in a variety of configurations and are customizable to meet just about any application.
Product Options
- Cryogenic series
- Large size range (1/2” through 52”)
- Body materials (CS and SS are standard)
- ANSI flanged, Butt-welded or DIN flanged end connections
- Variety of seals
- Automated models
- Non-spill style
- Position feedback
760 and 740 series (non-spreading design)
Non-spreading line blinds use a cam system to create space between the body flanges for the spectacle plate to slide or rotate into position and seal.
Features
- Safe and effortless operation with manually or with handwheel
- No pipe stress as the spectacle plate moves into position
- No pipe sag or misalignment from spreading
- Single person operation
700 series (spreading design)
The original design for line blinds. Depending on the size, 3 to 7 jack bolts are turned to create space, spread the pipe, and rotate the spectacle plate into position.
Features
- No tools needed for operation
- Cost-effective design
- Excellent for high pressure/extreme temperature applications
- Single person operation