Emerson 8800A, Руководство по эксплуатации продукта

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Rosemount Model 8800C Vortex Flowmeter
2-10
Wafer-Style Flowmeter
Alignment and Mounting
Center the wafer-style meter body inside diameter with respect to the
inside diameter of the adjoining upstream and downstream piping. This
will ensure that the flowmeter achieves its specified accuracy.
Alignment rings are provided with each wafer-style meter body for
centering purposes. Follow these steps to align the meter body for
installation. Refer to Figure 2-7 on page 2-11.
1. Place the alignment rings over each end of the meter body.
2. Insert the studs for the bottom side of the meter body between
the pipe flanges.
3. Place the meter body (with alignment rings) between the
flanges. Make sure that the alignment rings are properly
placed onto the studs. Align the studs with the markings
on the ring that correspond to the flange you are using.
If a spacer is used, see Spacers and Table 2-6 below.
NOTE
Be sure to align the flowmeter so the electronics are accessible, the
conduits drain and the flowmeter is not subject to direct heat.
4. Place the remaining studs between the pipe flanges.
5. Tighten the nuts in the sequence shown in Figure 2-9 on
page 2-12.
6. Check for leaks at the flanges after tightening the flange bolts.
NOTES
The required bolt load for sealing the gasket joint is affected by several
factors, including operating pressure and gasket material, width, and
condition. A number of factors also affect the actual bolt load resulting
from a measured torque, including condition of bolt threads, friction
between the nut head and the flange, and parallelism of the flanges.
Due to these application-dependent factors, the required torque for
each application may be different. Follow the guidelines outlined
in the ASME Pressure Vessel Code (Section VIII, Division 2) for proper
bolt tightening.
Make sure the flowmeter is centered between flanges of the same
nominal size as the flowmeter.
Spacers
Spacers are available with the Model 8800C to maintain the
Model 8800A dimensions. If a spacer is used, it should be downstream
of the meter body. The spacer kit comes with an alignment ring for ease
of installation. Gaskets should be placed on each side of the spacer.
Table 2-6. Dimensions for Spacers
Line
Size Dimensions
inch (mm)
1.5 (40) 0.47 (11.9)
2 (50) 1.17 (29.7)
3 (80) 1.27 (32.3)
4 (100) 0.97 (24.6)