32
NDX VALVE CONTROLLER
Suggested Piping Size
10 mm (3/8”)
10 mm (3/8”)
Loctite
577
Loctite
577
Supply Pressure (S)
Actuator Pressure (I and II)
All actuator types and sizes
All actuator types and sizes
Fig. 36
NOTE
It is recommended to use 10 mm (3/8”) (inside
diameter) supply air and actuator pressure piping.
NOTE
Liquid sealant such as Loctite 577 is recommend
ed. Excess sealant may result in faulty operation.
Sealing tape is not recommended. Ensure that the
air piping is clean. When pneumatic connector is
removed from the housing and reinstalled, make
sure the old sealant is removed and threads are
clean. Otherwise the dry old sealant might go to
pneumatic components and affect the controlla
bility or damage the device.
NOTE
The stroking times mentioned in the table
below are trendsetting. They are measured
with 3 bar supply air pressure without a
process pressure. They may vary significant
ly due to different factors such as, but not
limited to, pressure difference of the valve, the
stiction of the actuator, supply air pressure,
the capacity of the supply air system and the
dimensions of the supply air piping.
Actuator
NDX
Model
Size
Stroke
Stroke
Volume
NPT
Stroking times (s)
mm
dm3
in
3
Single acting
Spring
Air
VDD
25
20
0.9
54.9
1/4”
0.9
0.7
29
20
1.8
109.8
1/4”
1.1
0.8
37
40
3.5
213.5
1/4”
2.4
1.8
48
40
10.2
622.4
1/4”
4.5
3
VDR
25
20
0.9
54.9
1/4”
0.9
1.2
55
40
18.2
1110
1/4”
3.7
6.9
B1JU
6
0.47
28.7
3/8”
0.6
0.7
8
0.9
55
3/8”
0.8
0.8
10
1.8
111
3/8”
1.3
1.1
12
3.6
225
1/2”
2.0
2.4
16
6.7
415
1/2”
3.3
4.6
Double acting
Open
Close
VC
40
120
20.7
1262
1/2”
5.9
4.2
B1CU
6
0.33
20
1/4”
0.8
0.5
11
1.1
67
3/8”
1.1
0.7
17
4.3
262
1/2”
2.5
1.7
32
21
1280
3/4”
8.5
7
Example stroking times with supply pressure 5 bar.
9
PNEUMATICS PIPING
