GE PanaFlow MV80, Руководство пользователя

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PanaFlow™ MV80 & MV82 User’s Manual 23
Chapter 2. Installation
2.3.3 Installing Flowmeters with a Packing Gland Connection
Use the formula in Figure 13 below to determine the insertion depth for flowmeters (NPT and flanged) equipped with
an insertion tool. To install, see “Insertion Procedure for Flowmeters with Permanent Insertion Tool” on page 24 for
instructions for meters with a permanent insertion tool. For meters with a removable insertion tool, see “Insertion
Procedure for Flowmeters with Removable Insertion Tool” on page 26 .
Figure 13: Insertion Length Calculation for Meters with an Insertion Tool
Example 1 - Flange Style Meters:
To install a Series MV82 Flowmeter into a 14 inch schedule 40 pipe, the following measurements are taken:
•
F = 12 inches
•
R = 5 inches
•
t = 0.438 inches
Then, using the formula given in Figure 13 above, the insertion length for this example is 16.09 inches.
t
R
Flow
Insertion Length Formula
I = F + R + t –1.35
Where:
I = Insertion length.
F = Distance from the raised face of the flange or top of the process
connection for NPT style meters to the top outside of the process pipe.
R = Pipe inside diameter ÷ 2 for pipe diameters 10 inches and smaller.
R = Five inches for pipe diameters larger than 10 inches.
t = Thickness of the pipe wall. (Measure the disk cut-out from the tapping
procedure or check a piping handbook for thickness.)
I
F