Panametrics BWT System, Installation Manual, Page: 9 / 58

BWT™ System Installation Guide 1
Chapter 1. General Information
Chapter 1. General Information
1.1 Introduction
Installing the Bundle Waveguide Technology™ (BWT
TM)
System consists of creating a meter body, installing the
transducer buffer, and then mounting transducers into the buffer. Panametrics offers a variety of buffers and meter
bodies for liquid and gas applications. This section consists of general information for the following topics:
• Types of BWT buffers (see
page 1)
• General guidelines for transducer position and location (see page 2)
• BWT meter body (see
page 3)
• Handling and installing a meter body (see page 5)
• Welding requirements (see
page 7)
• Meter body requirements when flushing (see page 7)
IMPORTANT: If the BWT buffers and transducers are used in a PanaFlow HT system, you must follow all instructions in
the PanaFlow HT User’s Manual (910-294U) and Safety Manual (917-025).
1.2 Types of BWT Buffers
Buffers are used to protect the BWT transducers from temperature extremes. Since they mount directly into the pipe
coupling or nozzle, they also act as barriers against the process, making it possible for the transducers to be
removed without interrupting the process or emptying the pipe.
IMPORTANT: The buffers also ensure that the service temperature of the transducers remains at ambient.
There are three BWT buffer types available for transducers for liquid and gas applications:
• Standard BWT Buffer (part number FTPA ) - is used for liquid and gas applications. The
buffer has a flanged process connection and is available in two lengths: 2 in.
(temperatures up to 600
o
F/315
o
C) and 6 in. (temperatures up to 1,100
o
F/600
o
C).
• Acoustic Isolation BWT Buffer (part number FIPA ) - is used for gas applications at
lower pressures. The buffer has a flanged isolation section that reduces acoustic
short circuits. The outer buffer has a flanged process connection and is available in
two lengths
: 2 in. (temperatures up to 600
o
F/315
o
C) and 6 in. (temperatures up to
1,100
o
F/600
o
C).