The Metso Valmet A413313 is a high-performance Valve Processing Unit (VPU) designed for the Valmet DNA (formerly Metso DNA) automation system. It acts as a deterministic, real-time interface between intelligent field devices (such as valve networks) and the Distributed Control System (DCS). Engineered for the rigorous demands of the power, petrochemical, and pulp and paper industries, the A413313 ensures precise control loop stability and high-speed safety interlocking.
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Technical Description and Parameters
The VPU A413313 is built on an industrial-grade hardware architecture utilizing SMT technology and multi-layer PCBs. It is characterized by its deterministic signal processing, which guarantees minimal and constant I/O delay—critical for maintaining stable process control in complex loops.
- Module Type: Valve Processing Unit (VPU) / Communication Control Module
- Manufacturer: Metso (Valmet Automation)
- Voltage Inputs: 100–240V AC (2A) or 24V DC (8A)
- Signal Processing: Real-time logic processing for valve networks and safety systems
- Isolation: High electrical isolation between field circuits and internal logic
- Diagnostics: Integrated health monitoring (signal strength, loop impedance, and fault status)
- Communication: Compatible with Modbus, Profibus, and proprietary intelligent valve networks
Product Datasheet Specifications
- Part Number: A413313 (Alternate: VPU2 / 03 2169913)
- Weight: Approximately 2.70 kg (5.95 lbs)
- Dimensions: Standard modular design for Metso/Valmet automation cabinets
- Enclosure Rating: Often IP65 rated for dust and water protection (depending on housing)
- Operating Temperature: -20°C to +70°C (-4°F to +158°F)
- Material: Industrial-grade, corrosion-resistant components
Application Fields
The VPU A413313 is specialized for environments requiring extreme reliability and fast response times:
- Power Generation: Stable voltage control and high-speed execution in turbine control and substation automation.
- Petrochemical Plants: Managing pumping stations and ensuring safe operation of process controllers under harsh chemical exposure.
- Pulp & Paper: Coordinating complex valve networks in digitized paper machines and chemical recovery boilers.
- Safety Instrumented Systems (SIS): Providing the deterministic execution needed for high-speed emergency shutdown (ESD) sequences.
Product Instructions for Use
- Mounting: Install the module in a standard Valmet automation rack. Ensure the grounding pins are clean and free of oxidation to maintain proper shielding against industrial EMI.
- Power Connections: This module supports both AC and DC input. Verify your cabinet’s power distribution before connecting to ensure the input voltage matches the module’s 100-240V AC or 24V DC requirements.
- Communication Setup: When integrating into the Valmet DNA system, import the specific hardware definition file for the A413313 to enable real-time diagnostic reporting.
- Diagnostics: Use the integrated diagnostic features to perform predictive maintenance. Regularly monitor the reported loop impedance to detect potential field wiring degradation before it leads to a process trip.

Q&A: Frequently Asked Questions
Q: What is the primary difference between the A413313 and the A413311? A: While both are VPU modules, the A413313 typically offers higher power handling capacities and more advanced communication interfaces compared to the A413311 revision, making it more suitable for high-density valve networks.
Q: Can this module be used for standard analog sensors? A: The A413313 is optimized for valve processing and intelligent networking. For standard 8-channel analog acquisition, specialized modules like the A413125 (AIU8) are recommended.
Q: Does it support hot-swapping? A: Within the Valmet DNA architecture, most VPU modules support replacement under power, but it is critical to ensure that the safety interlocks associated with that valve loop are bypassed or in a safe state before removal.
Related Product News
In 2026, Valmet has reinforced its support for the A413 series by introducing software bridges that link legacy VPU units like the A413313 to the latest Valmet DNAe cloud-native platform. This update allows for “Smart Valve Diagnostics,” where the VPU transmits high-frequency data to AI-driven analytics engines to predict valve mechanical wear. Additionally, recent manufacturing runs for spare parts have focused on improved thermal management, allowing the A413313 to operate at higher efficiency with a 12% reduction in heat dissipation compared to older hardware revisions. This makes the A413313 an ideal choice for life-extension projects in aging petrochemical facilities.
