Sierra INNOVA-FLO 220 - Manual (Page 17)

Series 220/221 Instruction Manual Chapter 2 Installation
Series 220 In-Line Flow Meter Installation
Install the Series 220 In-Line Flow Meter between two conventional pipe
flanges as shown in Figures 2-3 and 2-4. Table 2-1 provides the recom-
mended minimum stud bolt lengths for wafer-style meter body size and dif-
ferent flange ratings.
The meter inside diameter is equal to the same size nominal pipe ID in sched-
ule 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 the factory before purchasing the meter.
Series 220 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 gas-
ket is larger than the inside diameter of the flow meter and adjacent piping. If
the gasket material extends into the flow stream, it will disturb the flow and
cause inaccurate measurements.
Flange Bolt Specifications
Stud Bolt Lengths for Each Flange Rating (inches)
Line Size Class 150 Class 300 Class 600
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
Table 2-1. Minimum Recommended Stud Bolt Lengths for Wafer Meters
The required bolt load for sealing the gasket joint is affected by several ap-
plication-dependent factors, therefore the required torque for each application
may be different. Refer to the ASME Pressure Vessel Code guidelines for
bolt tightening standards.
IM-22 2-3
1
2
3 4
1
2
3 4
5
6 7
8
1
5
9
3
7
11
2
6
10
4
8
12
4-bolt 8-bolt 12-bolt
Figure 2-2. Flange Bolt Torquing Sequence