Fisher ET User Manual

www.Fisher.com
D100398X012
Design ET and EAT easy-e
R
Valves
Class 125 through 600
Contents
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication 4. . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance 5. . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 5. . . . . . . . . . . . . . . . . . . . . . . .
Trim Maintenance 9. . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lapping Metal Seats 10. . . . . . . . . . . . . . . . . . . . .
Valve Plug Maintenance 10. . . . . . . . . . . . . . . . . .
Assembly 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENVIRO-SEAL

Bellows Seal Bonnet 13. . . . . . .
Replacing a Plain or Extension Bonnet with an
ENVIRO-SEAL Bellows Seal Bonnet
(Stem/Bellows Assembly) 13. . . . . . . . . . . . . .
Replacement of an Installed ENVIRO-SEAL
Bellows Seal Bonnet (Stem/Bellows
Assembly) 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purging the ENVIRO-SEAL Bellows
Seal Bonnet 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering 16. . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
Scope of Manual
This instruction manual includes installation,
maintenance, and parts information for 1- through
8-inch Design ET valves, and 1- through 6-inch
Design EAT valves, through Class 600 ratings. Refer
Figure 1. Design ET Control Valve with Type 667 Actuator
W1916-3 / IL
to separate manuals for instructions covering the
actuator and accessories.
No person may install, operate, or maintain a Design
ET valve without first (1) being fully trained and
qualified in valve, actuator, and accessory
installation, operation, and maintenance, and (2)
carefully reading and understanding the contents of
this manual. If you have any questions about these
instructions, contact your Fisher sales office before
proceeding.
Instruction Manual
Form 5081
June 2002
ET Valve

Fisher ET Specifications

General

Input Voltage	24 VDC
Output Current	4-20 mA
Communication Protocol	HART
Mounting	DIN Rail
Operating Temperature	-40 to 85°C

Summary

Introduction

Scope of Manual

Outlines the manual's coverage of valve installation, maintenance, and parts.

Valve Description

Details the Design ET and EAT valve types and their configurations.

Specifications

Lists typical specifications for the ET and EAT valves.

Installation

General Installation Procedures

Covers safety warnings, valve orientation, piping, and welding practices.

Maintenance

Packing Procedures

Covers lubrication, maintenance, and replacement of valve packing.

Trim Maintenance Procedures

Details disassembly, lapping metal seats, and valve plug maintenance.

ENVIRO-SEAL Bellows Seal Bonnet

Replacing Bonnet Assembly

Instructions for replacing plain or extension bonnets with ENVIRO-SEAL.

Replacing Installed Bonnet

Procedure for replacing an already installed ENVIRO-SEAL bonnet.

Purging Bellows Seal Bonnet

Steps for purging or leak testing the ENVIRO-SEAL bellows seal bonnet.

Parts Ordering

Ordering Information

Guidance on ordering replacement parts using serial numbers and part numbers.

Parts Kits

Gasket Kits

Lists part numbers for various gasket kits based on valve size and temperature.

Packing Kits

Lists part numbers for standard and ENVIRO-SEAL packing repair kits.

Parts List

Bonnet Parts

Lists components associated with the bonnet assembly and their part numbers.