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metso automation neles NP724

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POSITIONERS
Series NP
Installation, Maintenance and
Operating Instructions
7 NP 72 en
Issue 5/02
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metso automation neles NP724 Specifications

General IconGeneral
Temperature range-40 to +85°C (-40 to +185°F)
Hazardous area certificationATEX, IECEx, FM, CSA
ActionSingle or Double acting
Supply pressure1.4 - 7 bar (20 - 100 psi)
Enclosure ratingIP66

Summary

1 INTRODUCTION

1.1 General

Details the purpose and application of the NP700 positioner for double or single acting actuators.

1.2 Operating principle

Explains the force balance principle behind the positioner's operation and air flow.

1.3 Marking of positioner

Describes the information found on the positioner's adhesive ID plate.

1.4 Technical specifications

Lists key technical specifications like signal pressure ranges and supply pressure.

2 MOUNTING ON THE METSO AUTOMATION ACTUATOR

1.5 Approvals

Details the CENELEC, CSA, and FM approvals for NP700/B and NP700/B1 constructions.

1.6 Recycling and disposal of a rejected positioner

Provides guidance on recycling and disposal of the positioner and its parts.

1.7 Safety precautions

Highlights critical safety warnings regarding performance limitations, pressurized components, and moving parts.

2.1 General

Discusses mounting considerations when positioners are supplied with or separately from actuators.

2 MOUNTING ON THE METSO AUTOMATION ACTUATOR

2.2 Installing positioner NP700 S1 on Metso Automation actuators with VDIVDE 3845 mounting face

Step-by-step instructions for mounting the NP700/S1 positioner on VDI/VDE 3845 mounting faces.

2.3 Installing positioner NP700 S2 on Metso Automation Series B actuators

Instructions for mounting the NP700/S2 positioner on Metso Automation Series B actuators.

2.4 NP700700 positionerlimit switch combination

Guidance on combining the positioner with a limit switch, including adjustment notes.

2.5 Piping of supply and signal air

Details on connecting supply and signal air, including notes on single-action connections and sealants.

2.6 Instrument air supply

3 INPUT SIGNAL AND DIRECTIONS OF OPERATION

3.1 Changeover piece

Explains how to adjust the changeover piece for direct (D) or reverse (R) operation.

3.2 Cam plate

Describes the cam plate markings for signal ranges and the direction of rotation for rising signals.

4 PRELIMINARY ACTIONS FOR THE ADJUSTMENT

4.1 Position of the changeover piece

Instructions for selecting and mounting the changeover piece (D or R) for desired function.

4.2 Pilot valve

Notes on pilot valve removal, which is not necessary for changeover piece adjustment.

4.3 Position of the cam plate

Guidance on selecting the cam plate side (A or B) and rising segment for desired function.

5 BASIC ADJUSTMENT

6 -ADJUSTMENT

7 SPLIT-RANGE ADJUSTMENT

8 MAINTENANCE

8.1 Supply air filter

Instructions for locating, removing, and cleaning the supply air filter.

8.2 Pilot valve

Detailed steps for removing, cleaning, and reinstalling the pilot valve assembly.

8.3 Replacement of the diaphragm

Procedure for replacing the diaphragm, including notes on installation position and washers.

9 TROUBLE SHOOTING

10 OPTIONS

10.1 NP700 B and NP700 B1

Describes options for flameproof enclosure I/P converters.

10.2 NP700 GN natural gas construction

Details the natural gas construction with a 3/4 NPT exhaust port.

10.3 NP700 R dust-proof construction (IP 65)

Explains the dust-proof construction with a protective cover replaced by an exhaust port.

10.4 NP700 A with pressure gauges

Describes the option of equipping the positioner with a pressure gauge block.

11 TOOLS

12 ORDERING SPARE PARTS

13 DRAWINGS AND PARTS LISTS

13.1 Exploded view and parts list

Presents an exploded view of the positioner and its components with item numbers.

13.2 Mounting parts for B1 C6-502 and B1 J8-322 actuators (S1)

13.3 Mounting parts for Quadra-Powr actuators (S1)

13.4 Mounting parts for B1 C6-20 and B1 J8-20 actuators (S2)

13.5 Mounting parts for B1 C25-502 and B1 J25-322 actuators (S2)

14 TYPE CODE

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