There are basically two types of reducers, concentric & eccentric. Concentric reducers are used in vertical installations. Eccentric reducers are used in horizontal pipelines where there is change of bore to enable complete drainage of material without any hold up.
Concentric Reducers
| DN |
DN1 |
L |
Reference |
|
| 40 |
25 |
100 |
NSPR 1.5/1 |
 |
| 50 |
25 |
100 |
NSPR 2/1 |
| 50 |
40 |
100 |
NSPR 2/1.5 |
| 80 |
25 |
125 |
NSPR 3/1 |
| 80 |
40 |
125 |
NSPR 3/1.5 |
| 80 |
50 |
125 |
NSPR 3/2 |
| 100 |
25 |
150 |
NSPR 4/1 |
| 100 |
40 |
150 |
NSPR 4/1.5 |
| 100 |
50 |
150 |
NSPR 4/2 |
| 100 |
80 |
150 |
NSPR 4/3 |
| 150 |
25 |
200 |
NSPR 6/1 |
| 150 |
40 |
200 |
NSPR 6/1.5 |
| 150 |
50 |
200 |
NSPR 6/2 |
| 150 |
80 |
200 |
NSPR 6/3 |
| 150 |
100 |
200 |
NSPR 6/4 |
| 225 |
25 |
250 |
NSPR 9/1 |
| 225 |
40 |
250 |
NSPR 9/1.5 |
| 225 |
50 |
250 |
NSPR 9/2 |
| 225 |
80 |
250 |
NSPR 9/3 |
| 225 |
100 |
250 |
NSPR 9/4 |
| 225 |
150 |
250 |
NSPR 9/6 |
| 300 |
25 |
300 |
NSPR 12/1 |
| 300 |
40 |
300 |
NSPR 12/1.5 |
| 300 |
50 |
300 |
NSPR 12/2 |
| 300 |
80 |
300 |
NSPR 12/3 |
| 300 |
100 |
300 |
NSPR 12/4 |
| 300 |
150 |
300 |
NSPR 12/6 |
| 300 |
225 |
300 |
NSPR 12/9 |
| 400 |
25 |
350 |
NSPR 16/1 |
| 400 |
40 |
350 |
NSPR 16/1.5 |
| 400 |
50 |
350 |
NSPR 16/2 |
| 400 |
80 |
350 |
NSPR 16/3 |
| 400 |
100 |
350 |
NSPR 16/4 |
| 400 |
150 |
350 |
NSPR 16/6 |
| 400 |
225 |
350 |
NSPR 16/9 |
| 400 |
300 |
350 |
NSPR 16/12 |
| 450 |
25 |
375 |
NSPR 18/1 |
| 450 |
40 |
375 |
NSPR 18/1.5 |
| 450 |
50 |
375 |
NSPR 18/2 |
| 450 |
80 |
375 |
NSPR 18/3 |
| 450 |
100 |
375 |
NSPR 18/4 |
| 450 |
150 |
375 |
NSPR 18/6 |
| 450 |
225 |
375 |
NSPR 18/9 |
| 450 |
300 |
375 |
NSPR 18/12 |
| 600 |
50 |
400 |
NSPR 24/2 |
| 600 |
100 |
400 |
NSPR 24/4 |
| 600 |
150 |
400 |
NSPR 24/6 |
| 600 |
225 |
425 |
NSPR 24/9 |
| 600 |
300 |
425 |
NSPR 24/12 |
| 600 |
450 |
475 |
NSPR 24/18 |
Ecentric Reducers
| DN |
DN1 |
L |
L1 |
Reference |
|
| 40 |
25 |
100 |
6 |
NSPRE 1.5/1 |
 |
| 50 |
25 |
100 |
12 |
NSPRE 2/1 |
| 50 |
40 |
100 |
6 |
NSPRE 2/1.5 |
| 80 |
25 |
125 |
24 |
NSPRE 3/1 |
| 80 |
40 |
125 |
18 |
NSPRE 3/1.5 |
| 80 |
50 |
125 |
12 |
NSPRE 3/2 |
| 100 |
25 |
150 |
39 |
NSPRE 4/1 |
| 100 |
40 |
150 |
33 |
NSPRE 4/1.5 |
| 100 |
50 |
150 |
27 |
NSPRE 4/2 |
| 100 |
80 |
150 |
15 |
NSPRE 4/3 |
| 150 |
50 |
200 |
52 |
NSPRE 6/2 |
| 150 |
80 |
200 |
40 |
NSPRE 6/3 |
| 150 |
100 |
200 |
25 |
NSPRE 6/4 |
90° Bend Reducers
| DN |
DN1 |
L |
L1 |
Type |
Reference |
|
| 40 |
25 |
150 |
125 |
A |
NSPBR 1.5/1 |
 |
| 50 |
40 |
150 |
150 |
A |
NSPBR 2/1.5 |
| 80 |
50 |
150 |
150 |
A |
NSPBR 3/2 |
| 100 |
50 |
200 |
150 |
B |
NSPBR 4/2 |
| 100 |
80 |
200 |
175 |
B |
NSPBR 4/3 |
| 150 |
50 |
200 |
150 |
B |
NSPBR 6/2 |
| 150 |
80 |
250 |
175 |
B |
NSPBR 6/3 |
| 225 |
80 |
250 |
175 |
B |
NSPBR 9/3 |
| 300 |
80 |
300 |
175 |
B |
NSPBR 12/3 |
| 300 |
150 |
350 |
250 |
B |
NSPBR 12/6 |