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NEOTECHA NTB-NTC BALL VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
6.7.1 Face-to-face body dimensions for NTB-NTC ball valves
FACE-TO-FACE BODY DIMENSIONS
DN
mm
inches
15
½"
20
¾"
25
1"
40
1½"
50
2"
65
2½"
80
3"
100
4"
150
6"
6.8 Step-by-step valve installation
1. Check that the distance between flanges matches the face-to-face dimension of the ball valve.
Before installing the valve, spread the mounting flanges apart sufficiently using a suitable tool.
2. Remove the protective caps and position the ball valve in the pipeline. When installing a
C valve, check that the arrow points in the direction of flow.
3. Insert the fixing bolts.
4. Tighten the flange bolts hand-tight as the tool holding the flanges apart is gradually removed.
Make sure that the flanges remain correctly aligned.
5. Tighten all flange bolts in opposite pair sequence. Refer to following table for tightening
torques.
6.9 Recommended tightening torques for mounting flange bolts
6.9.1 Recommended tightening torques for NTB-NTC ball valves DIN-PN 16 and JIS-10K
RECOMMENDED TORQUES
DN
mm
inches
15
½"
20
¾"
25
1"
40
1½"
50
2"
65
-
80
3"
100
4"
-
6"
6.9.2 Recommended tightening torques for NTB-NTC ball valves ANSI B 16.10 class 150 (lbs)
RECOMMENDED TORQUES
DN
mm
inches
15
½"
20
¾"
25
1"
40
1½"
50
2"
65
-
80
3"
100
4"
-
6"
DIN-PN 16
ANSI-150 lbs
mm
mm
130
108
150
117
160
127
200
165
230
178
290
290 (DIN dimension)
310
203
350
229
480
267
ANSI-dim. 229
with extension
Bolts
metric
Class
4 x M12
A2-70
4 x M12
A2-70
4 x M12
A2-70
4 x M16
A2-70
4 x M16
A2-70
4 x M16
A2-70
8 x M16
A2-70
8 x M16
A2-70
8 x M20
A2-70
Bolts
UNC
Class
½"
B7
½"
B7
½"
B7
½"
B7
⅝"
B7
⅝"
B7
⅝"
B7
⅝"
B7
¾"
B7
JIS-10K
mm
130
150
160
200
230
290
310
350
480
ANSI-dim. 229
with extension
Torque
Nm
10
15
20
27
45
60
60
45
85
Torque
lbf·ft
9
13
18
21
41
52
52
38
68
5
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