METSO A413337 Central control module

Metso (Now Neles) Valve Positioners Overview

Metso (now part of Neles) offers a variety of intelligent valve positioners used to control control valves in industrial processes. These positioners receive signals from the control system and accurately adjust the control valve to the desired position, enabling precise control of flow, pressure, level, and temperature.

Product Detailed Description

• Function:

• Receives control signals from the control system (typically 4-20 mA or digital signals such as HART, FOUNDATION Fieldbus, PROFIBUS PA).

• Converts the control signal into the output signal required to drive pneumatic or electric actuators (typically air pressure or motor control signals).

• Monitors the actual position of the valve and adjusts it based on the deviation between the control signal and the actual position to ensure the valve reaches the desired precise position.

• Provides diagnostic functions to monitor valve performance and health.

• Supports various characteristic curves for optimal control performance.

• Features:

• Intelligent digital positioners with advanced control algorithms and diagnostic capabilities.

• Configurable characteristic curves and control parameters.

• Supports multiple communication protocols for easy integration into various control systems.

• Robust and durable design suitable for harsh industrial environments.

• Low power consumption design.

• Easy to install, commission, and maintain.

• Optional local operation interface (display and buttons).

Product Parameters

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

• Input Signal:

• Analog: 4-20 mA DC

• Digital: HART, FOUNDATION Fieldbus, PROFIBUS PA

• Output Signal:

• Pneumatic: Single-acting or double-acting, output pressure range varies by model (e.g., 0.2-1 bar, 0.2-7 bar).

• Electric: Motor control signal (depending on actuator type).

• Supply Voltage:

• Typically 24 V DC or powered via the communication bus.

• Protection Degree:

• Typically IP66 or IP67.

• Ambient Temperature:

• Operating temperature range varies by model (e.g., -40 °C to +85 °C).

• Linearity:

• High accuracy, typically better than ±0.5% or higher.

• Hysteresis:

• Low hysteresis to ensure control accuracy.

• Communication Protocol:

• HART, FOUNDATION Fieldbus, PROFIBUS PA (depending on the model).

• Certifications:

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

Product Advantages

• Precise Control:

• Advanced control algorithms and feedback mechanisms ensure precise control of valve position.

• Improved Process Efficiency:

• Accurate valve control helps optimize process parameters, improving production efficiency and product quality.

• Enhanced Safety:

• Reliable valve positioning helps ensure process safety.

• Diagnostic Functions:

• Provides diagnostic information on valve performance and health, facilitating predictive maintenance.

• Flexibility and Compatibility:

• Supports multiple communication protocols and characteristic curves, suitable for various control systems and applications.

• Robust and Durable:

• Suitable for harsh industrial environments.

• Ease of Use:

• Convenient installation, commissioning, and maintenance.

Precautions

• Correct Model Selection:

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

• Correct Installation:

• Follow the manufacturer's installation guidelines to ensure the positioner is correctly connected to the valve and actuator.

• Correct Electrical and Pneumatic Connections:

• Ensure that the power supply, control signal, and air supply (if applicable) are connected correctly and reliably.

• Parameter Configuration:

• Correctly configure the positioner's control parameters and characteristic curves according to specific application requirements.

• Regular Maintenance:

• Regularly inspect the positioner's connections, air lines (if applicable), and performance to ensure proper operation.

• Safe Operation:

• Always follow relevant safety procedures during installation, commissioning, and maintenance.

Product Applications

• Oil and Gas:

• Controlling control valves in various process flows.

• Chemical:

• Precisely controlling flow, pressure, and level.

• Power Generation:

• Controlling the flow of steam, water, and other fluids.

• Pulp and Paper:

• Controlling the flow of pulp and chemicals.

• Water and Wastewater Treatment:

• Controlling the flow of water and chemicals.

• Food and Beverage:

• Precisely controlling fluids in production processes.

• Pharmaceutical:

• Precisely controlling critical process parameters.

Shipping Port: Xiamen, China