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Oval NPI45B20 User Manual

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26 pages
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Microswitches
Potentiometer provided
Direct-reading type
Microswitch provided
or
Potentiometerv provided

This manual has been prepared to provide you with the information pertinent to the VALVE POSITION
INDICATOR. With the proper application of the information and knowledge contained in this manual, you will
be able to expect the best possible results over a long service life of this instrument. Keep this manual at hand
for your quick reference.
OVAL VALVE POSITION INDICATOR
MODEL NPI 45

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Oval NPI45B20 Specifications

General IconGeneral
BrandOval
ModelNPI45B20
CategoryTouch Panel
LanguageEnglish

Summary

CONVENTIONS

WARNING

Warning statements signal hazards that could result in severe injury or death.

GENERAL

General Specifications

Details general specifications like flow range, pressure, and temperature ratings.

CONFIGURATION AND OPERATING PRINCIPLE

Configuration

Illustrates the internal arrangement of components in the indicator.

Operating Principle

Explains how the oval rotors and internal mechanisms work to indicate valve position.

MICROSWITCH AND POTENTIOMETER OPERATION DIAGRAMS

WIRING CONNECTIONS

Wiring

Guidelines for field wiring, transmission length, and preventing interference.

Connections at Terminals

Detailed steps for connecting wires to the indicator's terminal block.

OPERATING PRECAUTIONS

MAINTENANCE

Microswitches fail to produce any signal...

Steps for troubleshooting microswitch signal failures.

Potentiometer is faulty.... Pointer movement is all right.

Steps for troubleshooting a faulty potentiometer.

DISASSEMBLY AND INSPECTION

Basic Body (wetted parts) Disassembly and Inspection

Detailed procedure for dismantling and inspecting the basic body and its wetted parts.

Magnetic Coupling Assembly

Procedure for disassembling and inspecting the magnetic coupling.

Reduction Gear Train

Steps for separating and inspecting the reduction gear unit.

Assembly Procedure

Instructions for reassembling the OVAL Valve Position Indicator.

MICROSWITCH, POTENTIOMETER, AND FRICTION CLUTCH ARRANGEMENTS

ASSEMBLY DRAWINGS AND PARTS LIST

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