Emerson Fisher GX

www.Fisher.com
Fisherr GX Control Valve and Actuator System
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Specifications 2...............................
Valve Installation 2..............................
Maintenance 4.................................
Actuator Maintenance 4........................
FIELDVUEt DVC2000 Digital Valve
Controller Mounting 11......................
Packing Maintenance 12........................
Replacing Packing 13..........................
Valve Trim Maintenance 17.....................
Bellows Maintenance 21........................
Handwheel Operation 22........................
Travel Stop Operation 23........................
Parts Ordering 37...............................
Parts Kits 38...................................
Parts List 39...................................
Figure 1. Fisher GX Control Valve, Actuator, and
FIELDVUE DVC2000 Digital Valve Controller
W8861
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher GX control valve and
actuator system.
Do not install, operate, or maintain a GX 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 GX is a compact, state‐of‐the‐art control valve and actuator system, designed to control a wide range of process
gases, vapors, and fluids.
The GX is rugged, reliable, and easy to select. It requires no actuator sizing ‐‐ the actuator selection is automatic once
the valve body construction is selected.
The GX meets the requirements of both EN and ASME standards. It is available with a complete accessory package,
including the FIELDVUE DVC2000 integrated digital valve controller.
Instruction Manual
D103175X012
GX Valve and Actuator
April 2011

Emerson Fisher GX Specifications

General

Manufacturer	Emerson
Actuation	Pneumatic
Output Signal	Pneumatic
Power Supply	24 VDC
Type	Integrated Control Unit
Communication Protocol	HART
Ambient Temperature	-40 to 85°C (-40 to 185°F)
Input Signal	4-20 mA
Enclosure Rating	IP66, NEMA 4X
Operating Temperature	-40 to 85°C (-40 to 185°F)

Summary

Valve Installation

Safety Warnings for Installation

Warns about personal injury and equipment damage during installation processes.

Maintenance Overview

General Maintenance Precautions

General safety warnings and procedures before performing any maintenance operations.

Actuator Maintenance Procedures

Covers periodic replacement of actuator soft parts and identifying stroking direction.

Actuator Disassembly (Air-to-Open)

Disassembly Steps (Air-to-Open)

Step-by-step instructions for disassembling the actuator for air-to-open configurations.

Actuator Disassembly (Air-to-Close)

Disassembly Steps (Air-to-Close)

Step-by-step instructions for disassembling the actuator for air-to-close configurations.

Packing Maintenance

Replacing Packing Procedure

Step-by-step guide for replacing packing in various bonnet constructions.

Valve Trim Maintenance

Valve Trim Disassembly

Procedures for disassembling valve trim components like plugs, stems, and seat rings.

Seat Ring and Cage Removal

Steps to remove seat rings and cages using specific tools.

Valve Trim Assembly

Instructions for assembling valve trim components.

Handwheel Operation

Handwheel Installation

Travel Stop Operation

Travel Stop Installation

Setting Travel Stop Position

Procedure for accurately setting the travel stop position.

Parts Ordering

Genuine Parts Warning

Warning about using only genuine Fisher replacement parts.