Proservo NMS5
22
Hauser
Note!
The valve is required when mounting NMS5 on pressurized liquid tanks.
NMS5 must be mounted on the asymmetric pipe in the direction shown on
Figure 16.
To calculate the required pipe diameters, the formula below should be used.
The variables and constants have the following meanings.
D1
Inner diameter of the upper part of the pipe
D2
Inner diameter of the lower part of the pipe
L
Length of the pipe (from the flange of NMS5 to bottom of the stilling well) meters
v
Deviation of the pipe from the vertical per length (mm/m)
d
Diameter of the displacer
e
Lateral shift of the displacer per length due to the groove of the wire drum
•
Upper Diameter of Stilling Well
D
1
> d + 10 mm
D1 should be 3" or more.
•
Lower Diameter of Stilling Well
- Asymmetric Pipe
D
2
> d+ eL + 2vL+ 10mm
- Concentric Pipe
D
2
> d + 2eL + 2vL + 10mm
Recommendations for Mounting Stilling Well
Note!
Follow the recommendations for mounting NMS5 with stilling well:
•
Keep the pipe connection welds smooth.
•
While drilling holes into the pipe, keep the interior surface of the holes clear of metal chips and burrs.
•
Coat or paint the interior surface of the pipe to avoid rust.
•
Keep the pipe as perfectly vertical as possible. Check this by a plumb.
•
Install the asymmetric pipe under the valve and fit the centers of the NMS5 and the valve.
•
Set the center of the lower part of the asymmetric pipe to the direction of the displacer motion.
•
Observe recommendations as per API MPMS chapter 3.1B.
•
Confirm grounding between NMS NMS5 and tank nozzle.
Feature: 070
Measuring Range/Material/Diameter of Wire
e = Lateral Shift (mm)
C
0-28m: SUS316L, 0.15mm
0.37
H
0-16m: PFA>SUS316, 0.4mm
0.40
K
0-16m: Alloy C, 0.2mm
0.47
L
0-36m: SUS316L, 0.15mm
0.33
M
0-22m: Alloy C, 0.2mm
0.47
N
0-47m: SUS316L, 0.15mm
0.30
4 Mounting of NMS5
