Onicon F-2600 Manual do Utilizador descarregar pdf (Página 21)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 21

2.2 F-2600 SERIES IN-LINE FLOW METER INSTALLATION

Install the in-line ow meter between two conventional pipe anges as shown in Figures 6 and

7. Table 1 provides the recommended minimum stud bolt lengths for wafer-style meter body size

and different ange ratings.

The meter's 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 the factory before purchasing the meter.

In-line meters require customer-supplied gaskets. When selecting gasket material, make sure that

it is compatible with the process uid and pressure ratings of the specic installation. Verify that

the inside diameter of the gasket is larger than the inside diameter of the ow meter and adjacent

piping. If the gasket material extends into the ow stream, it will disturb the ow and cause

inaccurate measurements.

Flange Bolt Specications

Stud Bolt Lengths for Each Flange Rating (inches)

Line Size

Class 150

and PN16

Class 300

and PN40

Class 600

and PN64

1 " 6.00 7.00 7.50

1½ " 6.25 8.50 9.00

2 " 8.50 8.75 9.50

3 " 9.00 10.00 10.50

4 " 9.50 10.75 12.25

Table 1. Minimum Recommended Stud Bolt Lengths for Wafer Meters

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.

Figure 5. Flange Bolt Tightening Sequence

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 130 131

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