Panametrics BWT System User manual

panametrics.com
Flow
916-058 F
July 2021
BWT™ System
Installation Guide

panametrics.com
Copyright 2021 Baker Hughes company.
This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries
in one or more countries. All third-party product and company names are trademarks of their respective
holders.
Flow
BWT™ System
Bundle Waveguide Technology™ Flow Transducer Sys-
tem
Installation Guide
916-058 F
July 2021

ii
[no content intended for this page]

BWT™ System Installation Guide
Chapter
Information Paragraphs
Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not
essential to the proper completion of the instructions.
IMPORTANT: These paragraphs provide information that emphasizes instructions that are essential to proper setup
of the equipment. Failure to follow these instructions carefully may cause unreliable performance.
Safety Issues
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working Area
CAUTION! This symbol indicates a risk of potential minor personal injury and/or severe damage to
the equipment, unless these instructions are followed carefully.
WARNING! This symbol indicates a risk of potential serious personal injury, unless these
instructions are followed carefully.
WARNING! It is the responsibility of the user to make sure all local, county, state and national codes,
regulations, rules and laws related to safety and safe operating conditions are met for
each installation.
WARNING! For installations in potentially hazardous areas, be sure to read the Certification and
Safety Statements
document at the end of this manual before beginning the
installation.
WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As
equipment can move suddenly and without warning, do not enter the work cell of this
equipment during automatic operation, and do not enter the work envelope of this
equipment during manual operation. If you do, serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out before
you perform maintenance procedures on the equipment.

Chapter
iv BWT™ System Installation Guide
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary
equipment. Examples include safety glasses, protective headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the equipment.
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
Baker Hughes is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE) take-back
initiative, directive 2012/19/EU.
The equipment that you bought has required the extraction and use of natural resources for its production. It may
contain hazardous substances that could impact health and the environment.
In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the
natural resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or recycle
most of the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please contact your local or regional
waste administration.
Visit www.bakerhughesds.com/health-safetyand-environment-hse for take-back instructions and more information
about this initiative.

BWT™ System Installation Guide
Contents
Chapter 1. General Information
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Types of BWT Buffers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 General Guidelines for Transducer Position and Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 BWT Meter Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4.1 Single-Traverse Meter Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4.2 Double-Traverse Meter Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Handling and Installing a Meter Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.1 Unpacking a Meter Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.2 Installing a Meter Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.6 Welding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7 Meter Body Requirements When Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 2. Standard Installation (FTPA Buffers)
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Identifying and Checking the Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Assembling the Standard FTPA Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Inserting the Standard FTPA Buffer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.5 Installing the BWT Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5.1 Installing and Orienting the Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.5.2 Inserting the BWT Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5.3 Verifying the Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 3. Acoustic Isolation Installation (FIPA Buffers)
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.2 Identifying and Checking the Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.3 Inserting the Acoustic Isolation FIPA Buffer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 Torquing the Studs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.5 Installing the BWT Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.5.1 Installing and Orienting the Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.5.2 Inserting the BWT Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
3.5.3 Verifying the Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.6 Installing Additional Acoustic Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Chapter 4. Non-Flanged Installation (FSPA/FWPA Buffers)
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
4.2 Installing the FSPA or FWPA Buffer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
4.3 Installing and Orienting the Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.4 Inserting the BWT Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5 Verifying the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapter 5. Specifications
5.1 Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.2 Flanged Buffer Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.3 Threaded Buffer Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.4 Socket-Weld Buffer Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.5 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Contents
BWT™ System Installation Guide

BWT™ System Installation Guide 1
Chapter 1. General Information
Chapter 1. General Information
1.1 Introduction
Installing the Bundle Waveguide Technology™ (BWTTM) 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 600oF/315oC) and 6 in. (temperatures up to 1,100oF/600oC).
• 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 600oF/315oC) and 6 in. (temperatures up to
1,100oF/600oC).

Chapter 1. General Information
2 BWT™ System Installation Guide
• Non-Flanged BWT Buffer (part number FSPA) - is used in liquid applications and has
a 1 in. NPT thread.
• Socket-Weld BWT Buffer (part number FWPA) - is used in liquid applications and has
a 1 in. coupling that is welded into the pipe coupling.
1.3 General Guidelines for Transducer Position and Location
Whichever transducer type is selected for your installation, flowmeter accuracy depends on proper transducer
location, spacing, alignment, and electronics programming. However, even though every transducer installation has
specific location considerations, the following location guidelines apply to all transducers, regardless of type:
1. To help assure a uniform flow profile, locate the buffers so that there are at least 10 pipe diameters of straight,
undisturbed flow upstream and 5 pipe diameters of straight, undisturbed flow downstream from the point of
measurement. The more straight run available the better. “Undisturbed flow” means avoiding sources of
turbulence such as valves, flanges, and elbows. You should also avoid swirl, cross flow and cavitation (in liquids).
2. It is important to locate the transducers on a horizontal plane. This specifically applies to mounting transducers
on a horizontal pipe. One transducer cannot be on top of the pipe and one on the bottom, because the top of the
pipe tends to accumulate gas (in liquids) and the bottom tends to accumulate sediment (in gas and liquids).
These contaminants can attenuate or block the ultrasonic signal. There is no similar restriction with vertical
pipes. However, in liquid applications you should avoid vertical downward flow to ensure a full pipe.
WARNING! For installations in potentially hazardous areas, be sure to read the Certification and
Safety Statements
document at the end of this manual before beginning the
installation.
CAUTION! A flowmeter’s accuracy and performance depends on the location, spacing, and
alignment of the transducers. The specific spacing of your transducers are unique to
your installation.

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
Top View End View
Top
A
A
Top
Section A-A
I.R.
2I.R.
2

Chapter 1. General Information
4 BWT™ System Installation Guide
1.4.2 Double-Traverse Meter Body
A double-traverse configuration consists of two transducers mounted on the pipe so that the signal traverses the
fluid two times before reaching the other transducer (see
Figure 3 below).
Figure 3: Double-Traverse Meter Body
TOP
L = Projected distance of
acoustical path in liquid.
P = Distance that the signal travels
through the liquid from one
transducer to the other.
L
P
45o45o

BWT™ System Installation Guide 5
Chapter 1. General Information
1.5 Handling and Installing a Meter Body
To ensure proper nozzle alignment, Panametrics uses the highest quality welding and machining techniques when
manufacturing meter bodies. Since proper alignment of the nozzles is important to making accurate flow
measurement, great care must be taken when unpacking and installing the meter body.
1.5.1 Unpacking a Meter Body
Upon receipt, you should take great care in unpacking the meter body. Although meter bodies are constructed of
steel, improper unpacking or handling can result in damage or affect nozzle alignment. Use the guidelines below for
unpacking the meter body:
• Since the nozzles protrude from the pipe, take care when removing packing material and the meter body from
its shipping container, so as not to disturb the nozzles.
• After the meter body is removed from its shipping container, never allow the full weight of the meter body to
rest on the nozzle or buffer. You should prop up the meter body to prevent it from rolling over, which again, may
cause damage or misalignment of nozzles.
• Do not let the meter body hit against other objects or surfaces. Nozzle alignment can be affected if the meter
body is dropped onto sand or the ground.
• If the meter body is shipped with the buffers already installed in the nozzles, take care as to not disturb the
buffers when unpacking.
1.5.2 Installing a Meter Body
Meter bodies can be either flanged or welded into the existing pipeline. Use the following steps to position the meter
body into the pipeline (refer to Figure 4 on the next page):
1. Find the tag plate with the words TOP and FLOW DIRECTION marked on it. If the meter body is flanged, two bolt
holes should straddle the vertical centerline.
IMPORTANT: In general (including cases where the meter body axis is not horizontal), be sure that the installation
does not allow gas or sediment to deposit in the transducer ports. Otherwise the sound waves could be
attenuated or blocked entirely.
2. Place the meter body in the pipeline so that the FLOW DIRECTION arrow mark is in the direction of flow and the top
is appropriately located. (Be sure the transducer ports are in a horizontal plane.)
IMPORTANT: If you cannot place the meter body in the required orientation, consult the factory; otherwise
operational problems may occur.
3. Do one of the following:
• Bolt the meter body into place and proceed to the appropriate section that follows to mount the BWT buffers
and transducers.
• Weld the meter body into place in accordance with the requirements described in
Welding Requirements
below. Once welding is completed, proceed to the appropriate section that follows to mount the BWT buffers
and transducers.
WARNING! Before installing the meter body, make sure pipe flushing is completed. For additional
information when flushing is necessary, refer to
“Meter Body Requirements When
Flushing” on page 7
.

Chapter 1. General Information
6 BWT™ System Installation Guide
Figure 4: Top View of a Flanged Meter Body
Top
End View
centerline symmetrically
Bolt holes straddle the
Top View
A
A

BWT™ System Installation Guide 7
Chapter 1. General Information
1.6 Welding Requirements
Prior to welding, do the following:
• Remove power from the flowmeter console and disconnect the cables from the transducers.
• Make sure the inside diameter of the meter body and process pipe are properly aligned. Misalignment can
affect measurement accuracy.
1.7 Meter Body Requirements When Flushing
Panametrics strongly recommends using a dummy meter body during flushing operations; otherwise, damage may
occur for the following reasons:
• Fast moving solid objects in the flowing medium could damage the buffer faces.
• Flushing residue/sediment could clog nozzles.
In the event that a dummy meter body is not available for flushing operations, remove the buffers and plug the holes
properly for the temperature and pressure used. Blind flanges are typically used.
Reinstall the buffers and transducers after flushing using the information in this guide.
CAUTION! Be sure to use new gaskets when reinstalling buffers. Never reuse gaskets for safety
reasons and acoustic performance of the flowmeter.

Chapter 1. General Information
8 BWT™ System Installation Guide
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BWT™ System Installation Guide 9
Chapter 2. Standard Installation (FTPA Buffers)
Chapter 2. Standard Installation (FTPA Buffers)
2.1 Introduction
The FTPA Buffer is used for both liquid and gas applications. The buffer has a flanged process connection and is
typically available in two lengths:
• 2 in.  6 in. for low process temperature ranges from -150 to 315oC (-270 to 600oF)
• 6 in.  6 in. for high process temperature ranges from -150 to 600oC (-270 to 1,100oF)
IMPORTANT: The buffer ensures that the service temperature of the transducer remains at ambient.
Use the sections that follow to properly install the buffers and transducers.
2.2 Identifying and Checking the Components
Panametrics supplies the parts required for your intended installation. Before you install the FTPA Buffer, check the
lists below to make sure you have all of the needed components. Refer to
Figure 5 on page 10 and Figure 6 on page 10
to help you identify each component.
Note: The list below is for a one-path installation.
• 2 FTPA buffers
• 2 BWT1 transducers
• 2 Kamprofile gaskets
IMPORTANT: Kamprofile gaskets must be used for two reasons: they ensure a leak tight seal and they provide
necessary acoustic isolation.
• 2 Mating lap-joint flanges
• 2 Junction boxes
• Preamplifiers - required for gas flow applications (may be mounted in transducer junction box)
• 3M epoxy or equivalent (for permanent bond)
(not shown in photo)
• Required studs, nuts and washers (not shown in photo)
• 10 ft (3 m) Coaxial cable with BNC connectors (not shown in photo)
• Additional preamplifier to electronics cable (required for gas flow applications) (not shown in photo)
You will need to supply the following additional items:
• Copperslip (SS316), Molykote grease P47 (CS) or equivalent anti-seizing compound
• Adjustable torque wrench with 15-148 ft-lb range (20-200 N-m) with socket drive
• Standard and deep sockets
• Adjustable wrench (12 in. long or equivalent)
• Steel wool
• Calipers
CAUTION! It is critical that you follow the instructions outlined in this document. If you do not,
Panametrics cannot ensure the proper operation of your equipment.

Chapter 2. Standard Installation (FTPA Buffers)
10 BWT™ System Installation Guide
Figure 5: Components for FTPA Buffer
Figure 6: Gaskets
BWT Transducer
Junction Box
FTPA Buffer
Mating Lap-Joint Flange
Kamprofile with Metal
Centering Ring (Typical)
Kamprofile without
Metal Centering Ring

BWT™ System Installation Guide 11
Chapter 2. Standard Installation (FTPA Buffers)
2.3 Assembling the Standard FTPA Buffer
Note: If the BWT system is shipped with the buffers already installed in the nozzles, proceed to “Installing the BWT
Transducer” on page 16
.
1. Slide the lap-joint flange over the threaded end of the FTPA Buffer. Make sure you orient the flange as shown
below.
2. Check the raised face of the spool nozzle flange to make sure it is free from paint, rust, dirt, corrosion, and
damage. If necessary, clean the raised faces with steel wool. In addition, clean the buffer flange if you are reusing
an existing buffer.
3. Inspect the gaskets supplied by Panametrics. They must not be used, warped, pitted or scratched.
4. Place one gasket on the end of the buffer assembly.
Lap-Joint Flange
Side View
FTPA Buffer Raised Edge
Side View
Coupler Raised Face
Gasket
Side View

Chapter 2. Standard Installation (FTPA Buffers)
12 BWT™ System Installation Guide
2.4 Inserting the Standard FTPA Buffer
1. Inspect the pipe nozzle. Make sure it is free from dirt and rust. Use steel wool to clean the pipe nozzle face and
inside surfaces if necessary.
2. Insert the buffer assembly into the nozzle.
3. Apply Copperslip, Molykote or equivalent anti-seize compound on the first several threads at both ends of each
stud.
4. Insert one of the studs through the flanges. Make sure the stamped quality rating on the stud (e.g. B7) is facing
away from the meter body. Hand-tighten a washer and nut on each end of the stud. Make sure you leave an
equal number of threads exposed on each end of the stud.
Side View
Side View
Nozzle