Metso D201135L Programmable controller

Metso (Now Neles) Positioners Overview

Metso (now part of Neles) positioners are high-precision devices used to control the valve position of industrial process valves. They receive signals from control systems and translate these signals into precise movements of the valve stem, ensuring the valve reaches the desired opening. Metso (Neles) positioners are known for their reliability, accuracy, and suitability for various demanding industrial environments.

Product Detailed Description

• Function:

• Receives control signals from controllers (e.g., 4-20 mA signal, HART, FOUNDATION Fieldbus, PROFIBUS PA).

• Compares the control signal with the actual position of the valve.

• Adjusts the driving force of the actuator (pneumatic, electric, etc.) based on the deviation until the valve reaches the set position corresponding to the control signal.

• Provides a feedback signal of the valve position to the control system.

• Many models offer advanced diagnostic functions for monitoring the performance of the valve and actuator.

• Features:

• Robust and durable design suitable for various industrial environments.

• High accuracy and repeatability, ensuring precise valve control.

• Low air consumption design, reducing operating costs (for pneumatic positioners).

• Easy to install, commission, and maintain.

• Support for multiple communication protocols for easy integration into different control systems.

• Configurable characteristic curves to suit different valve types and application requirements.

• Many models have self-diagnostic capabilities to monitor device status and issue alarms.

Product Parameters

As Metso (Neles) offers a wide range of positioner models, the following are some general parameters. Always refer to the official datasheet for the specific model:

• Input Signal:

• 4-20 mA DC (two-wire or four-wire).

• HART (superimposed on 4-20 mA).

• FOUNDATION Fieldbus.

• PROFIBUS PA.

• Electrical switching signals (discrete signals).

• Output Signal:

• Pneumatic output (e.g., pressure signals for single-acting or double-acting actuators).

• Electrical output (e.g., valve position feedback signals, alarm signals).

• Supply Air Pressure (for pneumatic positioners):

• E.g., 1.4 bar to 7 bar (20 psi to 100 psi).

• Degree of Protection (IP):

• E.g., IP66, IP67.

• Ambient Temperature:

• Operating temperature range typically from -40 °C to +85 °C (varies by model).

• Linearity:

• Typically ±0.5% or higher accuracy.

• Hysteresis:

• Typically small to ensure control accuracy.

• Mounting:

• Mounting brackets compliant with NAMUR or VDI/VDE standards.

• Certifications:

• ATEX, IECEx and other explosion-proof certifications (depending on the model).

• SIL (Safety Integrity Level) certifications (depending on the model).

Product Advantages

• Precise Control:

• High accuracy and repeatability ensure the valve reaches the required precise position.

• High Reliability:

• Robust and durable design suitable for demanding industrial environments.

• Energy Efficient:

• Low air consumption design reduces operating costs for pneumatic systems.

• Easy to Use:

• Simple installation, commissioning, and maintenance procedures.

• Flexible Communication:

• Supports multiple communication protocols for easy system integration.

• Enhanced Diagnostics:

• Many models offer self-diagnostic functions that aid in predictive maintenance and troubleshooting.

• Safe and Reliable:

• Some models have explosion-proof and SIL certifications for safety-critical applications.

Precautions

• Correct Selection:

• Select the appropriate positioner model based on valve type, actuator type, control signal, environmental conditions, and safety requirements.

• Correct Installation:

• Follow Metso (Neles) installation guidelines, ensuring the positioner is correctly connected and aligned with the valve and actuator.

• Supply Air Quality (for pneumatic positioners):

• Use dry, clean compressed air to prevent damage to internal components.

• Electrical Connections:

• Connect power and signal wires correctly according to the wiring diagram, ensuring proper grounding.

• Parameter Setting and Calibration:

• Use appropriate tools and software to correctly set and calibrate the positioner parameters for optimal performance.

• Regular Maintenance:

• Regularly inspect the operating status, connections, and air lines (for pneumatic positioners) of the positioner, and perform necessary maintenance.

• Safe Operation:

• Always follow relevant safety procedures when operating and maintaining the positioner.

Product Applications

Metso (Neles) positioners are widely used in various industrial sectors for precise control of various types of process valves, including:

• Oil and Gas:

• Controlling valves in production, transportation, and refining processes.

• Chemical:

• Precisely controlling the flow and pressure of various chemicals.

• Power Generation:

• Controlling the flow of steam, water, and fuel in power plants.

• Pulp and Paper:

• Controlling the flow of pulp and chemicals.

• Mining and Metallurgy:

• Controlling the flow of slurries and process liquids.

• Water and Wastewater Treatment:

• Controlling flow in water and wastewater treatment processes.

• Other Industrial Process Control Applications:

• Any industry requiring precise valve position control.

Shipping Port: Xiamen, China