Sierra INNOVA-MASS 241-VTP - Manual (Page 20)

Chapter 2 Installation Series 24-HP Instruction Manual
2-6 IM-24-HP
Series 241 Insertion Flow Meter Installation
Prepare the pipeline for installation using either a cold tap or hot tap me-
thod described on the following pages. 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 me-
ter, review the mounting position and isolation value requirements given
below.
Mounting Position
Allow clearance between the electronics enclosure top and any other ob-
struction when the meter is fully retracted.
Isolation Valve Selection
An isolation valve is available as an option with Series 241 meters. If you
supply the isolation valve, it must meet the following requirements:
1. A minimum valve bore di-
ameter of 1.875 inches is re-
quired, 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 flow meter’s maximum
operating pressure and tem-
perature.
3. Choose an isolation valve with at least two inches existing between
the flange face and the gate portion of the valve. This ensures that the
flow meter’s sensor head will not interfere with the operation of the
isolation valve.
1.875-inch min.
valve bore
2-inch min.
2-inch
valve size
Isolation Valve Requirements