GE PanaFlow MV80, Руководство пользователя

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PanaFlow™ MV80 & MV82 User’s Manual 15
Chapter 2. Installation
2.2.3 Installing Flange-Style Flowmeters (cont.)
To install the meter, complete the following steps:
1. Turn off the flow of process gas, liquid or steam. Verify that the line is not pressurized. Confirm that the
installation site meets the required minimum upstream and downstream pipe diameters.
2. Seat the meter level and square on the mating connections with the flange stamped with a flow arrow on the
upstream side, with the arrow head pointing in the direction of flow. Position a gasket in place for each side.
Make sure both gaskets are smooth and even with no gasket material extending into the flow profile.
Obstructions in the pipeline will disturb the flow and cause inaccurate measurements.
3. Install bolts in both process connections. Tighten the nuts in the sequence shown in Figure 5 on page 11 . Check
for leaks after tightening the flange bolts.
2.3 Series MV82 Insertion Flowmeter Installation
2.3.1 General Installation Guidelines
Prepare the pipeline for installation using either a cold tap or hot tap method described in this section. Refer to a
standard code for all pipe tapping operations. The following tapping instructions are general in nature and intended for
guideline purposes only. Before installing the meter, review the mounting position and isolation value requirements
given in the following sub-sections.
2.3.1a Electronics Enclosure Clearance
Allow clearance between the electronics enclosure top and any obstruction when the meter is fully retracted.
2.3.1b Isolation Valve Selection
An isolation valve is available as an option with Series MV82 meters. If you supply the isolation valve, refer to
Figure 8 below and verify that it meets the following requirements:
1. A minimum valve bore diameter of 1.875 inches is required, and the valve’s body size should be two inches.
Normally, gate valves are used.
2. Verify that the valve’s body and flange rating are within the flowmeter’s maximum operating pressure and
temperature.
3. Choose an isolation valve with at least a two inch distance between the flange face and the gate portion of the
valve. This ensures that the flowmeter’s sensor head will not interfere with the operation of the isolation valve.
Figure 8: Isolation Valve Dimensions
1.875-inch min.
valve bore
2-inch min.
2-inch
valve size
Isolation Valve Requirements