Emerson Fisher 2625, Instruction Manual

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Fisher
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2625 and 2625NS Volume Boosters
Contents
Introduction 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services 3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Connections 5 . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Connections 6 . . . . . . . . . . . . . . . . . . . . . .
Supply Pressure 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Ports 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information 7 . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 7 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diaphragm Assembly Replacement 8 . . . . . . . . . . . . .
Valve Assembly Replacement 9 . . . . . . . . . . . . . . . . . .
Installation of Diagnostic Connections 10 . . . . . . . . .
Parts Ordering 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher 2625 Volume Booster
W4727-1
Introduction
Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts information for Fisher 2625 and
2625NS volume boosters (figure 1). Refer to separate instruction manuals for information regarding the valve body,
actuator, and other accessories.
Do not install, operate, or maintain a 2625 or 2625NS volume booster 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 of the contents of this manual, including all safety cautions
and warnings.
If you have any questions regarding these instructions contact your Emerson Process Management sales
office before proceeding.
Description
The 2625 is certified for use in Safety Instrumented System (SIS) applications. Certification is by EXIDA Consulting LLC,
a global provider of functional safety and control system security. SIS certification is identified on the product by the
EXIDA logo on the 2625 nameplate.
The 2625 and 2625NS volume boosters are used in conjunction with a positioner on a throttling control valve to
increase stroking speed. The booster has a fixed deadband (controlled by the seat‐to‐seat dimension of the supply and
Instruction Manual
D100348X012
2625 and 2625NS Volume Booster
January 2015