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Metso NE724 User Manual

Metso NE724
20 pages
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7 NE 72 en • 2/2020
Positioners
Series NE
Installation, Maintenance and
Operating Instructions
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Metso NE724 Specifications

General IconGeneral
BrandMetso
ModelNE724
CategoryValve Positioners
LanguageEnglish

Summary

1 INTRODUCTION

1.2 Principle of operation

Explains the torque balance mechanism, force coil, feedback spring, and nozzle interaction for valve positioning.

1.4 Technical specifications

1.6 Safety precautions

2 MOUNTING ON THE METSO ACTUATOR

2.2 Installing positioner NE700/S1 on Metso actuators with VDI/VDE 3845 mounting face

Step-by-step instructions for mounting the positioner onto Metso actuators.

3 INPUT SIGNAL AND DIRECTIONS OF OPERATION

3.1 Changeover piece

How to select and set the changeover piece (D or R) for direct or reverse action.

3.2 Cam plate

Guidance on selecting cam plate segments for different signal ranges and valve actions.

4 PRELIMINARY ACTIONS FOR THE ADJUSTMENT

4.3 Setting the internal feed-back spring

How to select the spring setting based on actuator size for proper amplification.

5 BASIC ADJUSTMENT

6 α₀ ADJUSTMENT

7 SPLIT-RANGE ADJUSTMENT

8 MAINTENANCE

9 TROUBLESHOOTING

9.1 Electrical defects

Guide to diagnosing electrical issues using measurements on the terminal card.

9.2 Mechanical defects

Troubleshooting guide for common mechanical problems affecting actuator position.

13 DRAWINGS AND PARTS LISTS

14 TYPE CODE

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