GE PanaFlow MV80, Руководство пользователя

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PanaFlow™ MV80 & MV82 User’s Manual 11
Chapter 2. Installation
2.2 Series MV80 In-Line Flowmeter Installation
Install the Series MV80 In-Line Flowmeter between two conventional pipe flanges as shown in Figure 6 on page 12
and Figure 7 on page 14 . Table 2 below provides the recommended minimum stud bolt lengths for wafer-style meter
body size and different flange ratings.
The meter inside diameter is equal to the same size nominal pipe ID in schedule 80. For example, a 2" meter has an ID
of 1.939" (2" schedule 80). Do not install the meter in a pipe with an inside diameter smaller than the inside diameter of
the meter. For schedule 160 and higher pipe, a special meter is required. Consult GE before purchasing the meter.
Series MV80 Meters require customer-supplied gaskets. When selecting gasket material make sure that it is compatible
with the process fluid and pressure ratings of the specific installation. Verify that the inside diameter of the gasket is
larger than the inside diameter of the flowmeter and adjacent piping. If the gasket material extends into the flow stream,
it will disturb the flow and cause inaccurate measurements.
2.2.1 Flange Bolt Specifications
The required bolt load for sealing the gasket joint is affected by several application-dependent factors. Therefore the
required torque for each application may be different. Refer to the ASME Pressure Vessel Code guidelines for bolt
tightening standards and refer to
Figure 5 below for the proper bolt tightening sequence.
Figure 5: Flange Bolt Torquing Sequence
Table 2: Minimum Recommended Stud Bolt Lengths for Wafer Meters
Stud Bolt Lengths for Each Flange Rating (inches)
Line Size Class 150 and PN16 Class 300 and PN40 Class 600 and PN64
1 inch 6.00 7.00 7.50
1.5 inch 6.25 8.50 9.00
2 inch 8.50 8.75 9.50
3 inch 9.00 10.00 10.50
4 inch 9.50 10.75 12.25
1
2
3 4
1
2
3 4
1
2
3 4
8
6 7
5
8
12 5
9
7
11 6
10
4-bolt 8-bolt 12-bolt