METSO A413160 Pneumatic relay module
The Metso (now Neles/Valmet) A413160 is a critical pneumatic component, specifically the Spool Valve Assembly / Pneumatic Relay Module used within the Neles ND9000 series intelligent valve positioners.
It is the high-capacity version of the pneumatic amplifier stage.
1. Product Description
The A413160 is a high-flow pneumatic relay designed to control the flow of compressed air to large-scale actuators.
In an intelligent positioner, while the electronics (CPU board) provide the logic, the A413160 acts as the “power stage.” It translates low-power pilot signals into high-volume air movement to ensure large valves can open or close rapidly and accurately.
It features a precision-machined spool and sleeve design, optimized for long life and minimal friction, ensuring that the valve positioner can modulate with sub-millimeter precision.
2. Technical Parameters (Technical Data)
| Parameter | Specification |
| Component Type | High-Flow Pneumatic Relay / Spool Valve |
| Supply Pressure | 1.4 – 8.0 bar (20 – 115 psi) |
| Max Air Delivery | Approx. 18 $Nm^3/h$ (at 6 bar supply) |
| Steady-state Air Consumption | < 0.15 $Nm^3/h$ at 4 bar |
| Response Time | High-speed dynamic switching (< 10ms pilot response) |
| Medium | Clean, dry, oil-free compressed air or inert gas |
| Temperature Range | -40°C to +85°C |
| Material | Anodized Aluminum / Stainless Steel internals |
3. Product Advantages & Key Features
High Flow Capacity: Specifically designed for large-volume actuators (like the Neles B1C/B1J 50 and above), significantly reducing the “Stroking Time.”
Minimal Hysteresis: The spool valve design ensures a linear relationship between the pilot signal and output flow, preventing “jumping” or erratic valve movement.
Internal Filtration: Equipped with fine-mesh protection screens to prevent pilot orifice clogging from instrument air debris.
Energy Efficient: Despite its high-flow capability, it maintains an extremely low bleed rate when the valve is in a steady state, saving plant air costs.
Field Replaceable: Modular design allows for the replacement of the entire relay unit in minutes without removing the positioner from the valve.
4. Application Cases
Large Bore Control Valves: Used on 12″ and larger butterfly or ball valves where massive air volumes are needed for movement.
Fast Action Dampers: Control of air intake or exhaust dampers in power plants requiring rapid modulation.
Anti-Surge Valves: In compressor stations where the valve must react within milliseconds to prevent catastrophic equipment damage.
High-Vibration Environments: Mining and pulp processing where mechanical stability of the pneumatic stage is vital for consistent control.
A413160
5. Related & Other Models in the Series
The A413160 is part of the modular pneumatic family for the ND9000:
ND9200: The high-flow version of the positioner that typically uses this A413160 relay.
A413152: The standard-flow relay version for smaller actuators.
A413120: An alternative relay module for specific older revisions of the ND9100.
B1-Series Actuators: The pneumatic cylinders (Double Acting or Spring Return) that this module powers.
A413111: The feedback potentiometer that works in tandem with this relay to confirm valve position.