Emerson Fisher TBX Instruction Manual

Instruction Manual
D103172X012
February 2010
Fisherr TBX Steam Conditioning Valve
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location of Pressure Tap
Location of Temperature Sensor
Control Strategies . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of Valve Bonnet and Trim
Removal and Replacement of Nozzles
Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual includes installation,
maintenance, and operation information for the
Fisher TBX control valve. Refer to separate
instruction manuals for instructions covering the
actuator and accessories.
Do not install, operate, or maintain a TBX valve
without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and
maintenance. To avoid personal injury or property
damage, it is important to carefully read, understand,
and follow all the contents of this manual, including
all safety cautions and warnings. If you have any
questions about these instructions, contact your
Emerson Process Management sales office before
proceeding.

Description

The TBX Steam Conditioning Valve (see figure 1)
provides a convenient and efficient way to reduce
steam pressure and temperature within a single
device. Typical installations include steam
backpressure control, turbine bypass, boiler start-up
service, auxiliary steam letdown for drying rolls,
www.Fisher.com
1
1
1
. . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . 2
2
3
9
9
. . . . . . . . . 10
. . . . . . 12
12
15
16
16
W8740-2A
Figure 1. Fisher TBX Steam Conditioning Valve
kettles, equipment drives, plant heating, and other
loads requiring dependable and accurate control of
steam pressure and temperature.
The TBX Steam Conditioning Valve (figure 1) is
designed to handle the most severe applications in
today's cycling power plants as well as provide
precise pressure and temperature control for
process applications. The TBX incorporates over 20
years of steam conditioning experience and product
development. The valve body is designed with the
latest finite element analysis (FEA) and
computational fluid dynamics (CFD) tools to optimize
performance and reliability for demanding steam
systems.
The TBX is a flow up design providing the ultimate
combination of performance and maintainability (see
figure 2). The TBX incorporates Emerson Process
Management's low noise Whisper Trimt
technology. The simplified trim configuration is
thermally compensated to handle the rapid changes
in temperatures expected during a turbine trip.
TBX Valve