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070.550-IOM (JUN 2016)
Page 11
NGC GAS ROTARY SCREW COMPRESSOR
INSTALLATION
Figure 6. Port Locations, NGC 400/450.
NOTE:
Model 400 is shown for illustrative purposes only. Configurations of other compressors will vary.
NGC 400/450
S
YMBOL
POR
T SIZE
DES
CRIP
TION
SB-2
3/4-14 NP
TF
Inlet Bearings, Balance Pistons, Manif
old Bloc
k Pr
es
sur
e
SB-3
2" Squar
e Flange
Compr
es
sor Oil Supply
S
C-
4
1/2-14 NP
TF
Inlet Oil Dr
ain
S
C-
5
3/8-18 NP
TF
Inlet Pr
es
sur
e
S
C-
6
3/8-18 NP
TF
Dis
char
ge Pr
es
sur
e
S
C-
7
1/8-27 NP
TF
Seal W
eepage
S
C-
8
1 1/4-11 1/2 NP
T
Closed Thr
ead Dr
ain
S
C-
9
1 1/2-11 1/2 NP
T
Closed Thr
ead Dr
ain
S
C
-13
1/2-14 NP
TF
Cylinder Oil Dr
ain
S
C
-15
1 1/4-11 1/2 NP
TF
Gear Co
ver Oil Dr
ain
S
C
-16
1 1/2-11 1/2 NP
T
Dis
char
ge Housing Oil Dr
ain
S
C
-17
1/2-14 NP
TF
Dis
char
ge Housing Sump Dr
ain
SL
-1
1 1/4-11 1/2 NP
T
Lo
w Vi Liquid Injection
SL
-2
1 1/4-11 1/2 NP
T
High Vi Liquid Injection
SM-1
2" Squar
e Flange
Main Oil Injection
SV
-1
3" Squar
e Flange
Economizer
T
1/2-14 NP
TF
Manif
old Bloc
k T
ank