Grain Systems PNEG-526 - Manual (Page 176)

1" NPT Vent
connection
1 /
2
" NPT Control
line connection
121-16
PIPE SIZES (inlet x outlet)
3" x 3"
4" x 4" Flanged ANSI 125 lb. FF
12
Standard
}
3" and 4" Model 121
3" and 4" Model 121
Back Pressure
121-12
1" NPT Vent
connection
1/4 " NPT Control
line connection
1
2
3
9 45
21
11
22
1" NPT Vent
connection
" NPT Control
line connection
23
24
25
26
a
b
c
d
f
h
27 29
29a
21a
12
a
b
c
d
14
28
121-12 (Back Pressure)
1
2
3
4
5
2a
8
7
9
10
26
45
21
11
22
1" NPT Vent
connection
" NPT Control
line connection
3" 121 as shown.
4" 121 uses a spacer,
approx. 1" O.D. x " I.D.
x " thick.
23
24
25
26
a
b
c
d
f
h
27
28
29
32
33
34
35 32 37 38 16b 16a 15 15a
21a
12
13
14
a
b
c
d
1
2
3 4
3 16
17 18 19 19a
121-16