Fisher 3570 User Manual

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Fisher
r
3570 Pneumatic Valve Positioners
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Valve Positioner Type Numbers 2.............
Specifications 4...............................
Educational Services 4.........................
Installation, Mounting, and Connections 5..........
Installation 5.................................
Diagnostic Test Connections (Optional) 6.....
Connections 7................................
Piping Sizes 7.............................
Vent 8...................................
Supply Pressure Connections 9..............
Cylinder Connections 10....................
Instrument Connection 10..................
Operating Information 11........................
Initial Adjustments 11..........................
Adjustment Procedures 11......................
Changing Positioner Action 12..................
Split Range Operation 15.......................
Initial Range Spring Extension Procedure
for 3570P and 3570PC Positioners 15..........
Principle of Operation 17........................
3570, 3570C, 3570P, 3570PC, and
3571 Valve Positioners 17....................
3572 and 3576 Valve Positioners 18..............
3573 and 3577 Valve Positioners 19..............
Relay Operation 20............................
Maintenance 21................................
Troubleshooting 22............................
Converting a 3570 Valve Positioner to a
3570C Valve Positioner 23....................
Range Spring 24..............................
Disassembly 24............................
Assembly 24..............................
Figure 1. Fisher 3570 Positioner Mounted on
470 Actuator
W5566
Bias Spring 25................................
Disassembly 25............................
Assembly 25..............................
Parts Ordering 25...............................
Parts Kits 26...................................
Positioner Repair Kits 26........................
Diagnostic Test Connection Kits 26...............
Parts List 26...................................
Positioner Common Parts 26....................
Introduction
Scope of Manual
This manual provides installation, operation, adjustment, maintenance, and parts ordering information for Fisher
3570 pneumatic valve positioners. The various product types within this series are described later in this manual. Refer
Instruction Manual
D200137X012
3570 Positioners
September 2015

Fisher 3570 Specifications

General

Brand	Fisher
Model	3570
Category	Controller
Language	English