Element Position 0 To - Endress+Hauser Proservo NMS83 Operating Instructions Manual

Proservo NMS83
Endress+Hauser
Lower diameter of stilling well
The dimension of D has to be the larger value of the dimensions D
2
See the table below.
Concentric pipe
D Dimension D Dimension
2 2x
(Example)
Example
>100.9 mm 68.1 mm
(3.97 in) (2.68 in)
100.9 mm
(3.97 in)
Example: L = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
2
Asymmetric pipe
D Dimension D Dimension
2 2x
(Example)
Example
>84.5 mm 68.1 mm
(3.33 in) (2.68 in)
84.5 mm
(3.33 in)
Example: L = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
2
Recommendations for NMS8x mounting with a stilling well
Follow the recommendations for mounting NMS8x with a 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.
• 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 NMS8x 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 NMS8x and the tank nozzle.
Description
Parameter
D Calculated D value
1 1
D D dimension when the displacer is
2b 2
in L length
2
Description
Parameter
D Calculated D value
1 1
D D dimension that the displacer can
2b 2
pass through (nth groove)
Installation
and D .
1 2b
Formula
= 2 x (|p (L )| + d/2 + s)
2
Formula
= |p (L )| + d/2 + s + D /2
2 1
23