Panametrics BWT System, Installation Manual, Page: 11 / 58

BWT™ System Installation Guide 3
Chapter 1. General Information
1.4 BWT Meter Body
BWT installations typically use a tilted-diameter meter body. A tilted-diameter meter body is so named because the
transducers send their pulses at an angle across the diameter of the pipe. This type of meter body can be configured
as a single-traverse or double-traverse installation.
Note: The mounting angle for the transducer is typically 45°, but other angles (20°, 30°, or 60°) can be used as
required. Tilted diameter can also refer to paths that are off-diameter such as the mid-radius path.
A meter body is created by mounting the nozzles on the existing pipeline, or on a flowcell . A flowcell is a
precision-manufactured section of matching pipe that contains the ports where the transducer buffers will be
mounted. This setup allows more accurate transducer alignment before mounting the meter body into the pipeline. If
requested, a meter body can be calibrated prior to shipment. All meter bodies are factory-supplied.
1.4.1 Single-Traverse Meter Body
A single-traverse configuration consists of two transducers mounted on opposite sides of the pipe so that the signal
they transmit passes through the fluid just once, typically at a 45° angle (see Figure 1 below). A single-traverse
configuration may include more than one path (see Figure 2 below).
Figure 1: Single-Traverse, 2-Path, Diagonal 45 Meter Body
Figure 2: Single-Traverse, 2-Path, Mid-Radius Meter Body
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