en - Installation and planning notes
Ducting lengths
14
90° elbow
45° elbow
90° elbow
45° elbow
90° concertina bend
45° concertina bend
90° segmented bend
(3 welded seams)
45° segmented bend
(3 welded seams)
90° elbow, Westaflex
ducting
45° elbow, Westaflex
ducting
Based on the number of bends, the ducting lengths must be deduc-
ted from the maximum permissible ducting length.
Type of elbow
Length of ducting
PRI 210*
PRI 214
PRI 217
r = 2 d
0.25 m
r = 2 d
0.15 m
r = d
0.35 m
r = d
0.25 m
r = 2 d
0.7 m
r = 2 d
0.55 m
r = 2 d
0.45 m
r = 2 d
–
r = d
–
r = 2 d
0.5 m
r = 4 d
0.35 m
r = d
–
r = 2 d
0.4 m
r = 4 d
0.3 m