WIKA LGG serie Betriebsanleitung Seite 14

5. Commissioning, operation
Close valves and shut-off, drain and vent fittings
■
Valve with quick closing lever
Closing in a clockwise direction
EN
Test the screw connections of the sight glass.
■
Tighten the screw connections with a torque spanner to the specified
values from the table. The sequence for the systematic tightening of
the screws is illustrated in the following sketch.
Tightening torques in Nm for covers and pressure plates
Size
7/16 UNC
3/4 UNC
M10
M12
14
Material
A193 B7
A320 L7
A193 B8
Duplex
A193 B7
A320 L7
A193 B8M
8.8
A2-70
A4-70
8.8
A2-70
A4-70
Operating instructions glass level gauge, model LGG
Valve with handwheel
Closing in a clockwise direction
Max. allowed operating pressure
up to 100 bar
35
35
45
50
80
80
-
30
20
20
50
35
45
> 100 bar
-
-
-
60
-
120
120
-
-
-
-
-
-