Endress+Hauser Proservo NMS5 Operating Instruction page 30

5 Installation
30
Lower Diameter of stilling well
The dimension of D has to be the larger value of the dimensions D
2
Concentric pipe
D dimension
D Dimension
1x
1
(Example)
Example
68.1mm (2.68in)
>101.2 mm
(3.98 in)
101.2mm(3.98in)
Example: L = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
2
Asymmetric pipe
D dimension
D Dimension
1x
1
(Example)
Example
68.1mm (2.68in)
>84.7 mm
(3.33 in)
84.7mm(3.33in)
Example: L = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
2
Recommendations for mounting stilling well
Follow the recommendations for mounting NMS5 with stilling well:
• Keep the pipe connection welds smooth.
• When 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 prevent corrosion.
• Keep the pipe as vertical as possible. Check using a plumb bob.
• 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 in the direction of the lateral motion.
• Observe the recommendations as per API MPMS chapter 3.1B.
• Confirm grounding between NMS5 and the tank nozzle.
Description
Symbol
D Calculated D Value
1 1
D dimension when the displacer
2
D
2b
is in L length
2
Description
Symbol
D Calculated D Value
1 1
D dimension that the displacer
2
D
2b
can pass through (Nth groove)
Proservo NMS5
and D . See the graph above.
1 2b
Formula
N/A
= 2 x (|p (L )| + d/2 + s)
2
Formula
N/A
= |p (L )| + d/2 + s + D
2
Endress+Hauser
/2
1