Line Blind Unions

 

Operating on the principle of a conventional threaded line union, the Line Blind Union offers a simple and time-saving means of obtaining positive leak-proof shutoff. Common applications include compressor air and fuel lines, boiler and heater burner manifolds, storage tank foam lines and steam systems.

Line Blind Unions employ a reversible figure-B spectacle plate with O-rings to insure fully open and fully closed lines. A specially designed safety-slot is incorporated in the stationary seat to prevent spectacle blow-out. Simply loosen the nut to spread the seats, end-to-end the spectacle, and then re-tighten the nut to draw the seats together. O-ring seals on machined spectacles provide a positive seal against leakage.

Greenwood Valve Catalog

Parts

No. Req. Part Material
1 1 Spectacle Stainless Steel
2 4 O-Rings Viton Teflon
3 1 Hex Nut Zinc Plated Carbon Steel
4 1 Moveable Seat Zinc Plated Carbon Steel
5 1 Stationary Seat Zinc Plated Carbon Steel
6 1 Retaining Ring Stainless Steel
7 1 Safety Slot  

 

Line Blind Unions Drawing
Dimensions

Value Size (in) - #600         
Value Size (in) - #3000   
Description
1/2 & 3/4
1
1 1/2
2
1/2 & 3/4
1
1 1/2
2
Overall Length Center to Top of Plate
A
3 7/8
4
4 3/4
4 7/8
4
4 3/4
4 7/8
5 5/8
Spectacle Max. Width Across
B
3
3 1/4
4 3/8
5 1/8
3 1/4
4 3/8
5 1/8
5 7/8
Corner of Nut
C
2 3/8
2 3/4
2 3/4
4 3/8
2 3/4
2 3/4
4 3/8
5 5/8
Spectacle Plate Face of Valve
D
3/8
3/8
5/8
5/8
3/8
5/8
5/8
11/16
Spectacle Plate
E
1 1/4
1 1/4
1 1/2
1 1/2
1 1/4
1 1/2
1 1/2
3 3/8
Net Weight (lbs)
--
2 1/4
2 3/4
4 1/2
5 1/4
2 3/4
4 1/2
5 1/4
17