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General| Category | Valve Positioners |
|---|---|
| Brand | Metso Automation |
| Model | Neles NP729 |
| Input signal | 4-20 mA |
| Enclosure rating | IP66 |
| Type | Pneumatic |
| Supply pressure | 20-100 psi |
| Ambient temperature range | -40 to +80°C (-40 to +176°F) |
| Hazardous area certifications | ATEX, IECEx |
| Communication | HART |
Explains the force balance principle behind the positioner's operation.
Lists key performance parameters and physical characteristics of the positioner.
Highlights critical safety warnings for operation and handling of the positioner.
Step-by-step guide for mounting the NP700/S1 positioner on specific actuators.
Instructions for mounting the NP700/S2 positioner on Metso Automation Series B actuators.
Details on connecting air supply and signal lines to the positioner.
Procedure for setting the closed limit and performing zero adjustment.
Procedure for setting the open limit and adjusting the range.
Details the process of performing split-range adjustments using the cam plate.
Procedures for checking and cleaning the pilot valve.
Step-by-step guide for replacing the positioner diaphragm.
Identifies causes when signal pressure changes do not affect actuator position.
Troubleshooting for actuators reaching final position with small signal changes.
Common causes for inaccurate positioning of the positioner.
Diagnosing issues related to overshooting or slow response in positioning.
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