Description
Unboxing & Hardware Overview
- Manufacturer & Architecture: Metso (Automation / Flow Control Division — Valve & Actuator Accessories)
- Part Number / Model: 423161 (Catalog Designation: Actuator Service Kit)
- Product Type: Preventive Maintenance / Repair Overhaul Kit for Metso Pneumatic Actuators (specifically matched for models such as the Metso A120 K-R series)
- Physical Dimensions: Compact factory-sealed packaging containing precision elastomer seals, O-rings, gaskets, and wear components tailored for a complete actuator rebuild
- Estimated Shipping Weight: ~1.0 to 2.0 lbs (0.45 to 0.9 kg) enclosed in protective anti-corrosion packaging and structural cushioning
- Primary Condition Status: Factory New / OEM Original Service Kit (verify exact actuator model and revision tier with your provider prior to dispatch)
Product Introduction
The Metso 423161 is a genuine OEM actuator service kit engineered for routine maintenance, refurbishment, and lifecycle extension of Metso pneumatic rack-and-pinion or piston actuators (such as the A120 series).
Over time, continuous cycling and exposure to harsh industrial environments can degrade internal elastomeric seals, leading to pneumatic pressure leaks and reduced actuator torque output. Utilizing an original Metso service kit ensures that all replacement O-rings, backup rings, and slide bearings match the exact chemical compatibility, temperature ranges, and dimensional tolerances required to restore factory performance.
Core Technical Specifications
| Parameter | Value |
| Product Line | Metso Flow Control / Valmet Automation Actuator Spares |
| Part Identifier | 423161 (Actuator Service / Overhaul Kit) |
| Target Actuator Model | Designed for Metso pneumatic actuators (e.g., A120 K-R series and compatible variants) |
| Kit Contents | Complete set of internal dynamic/static O-rings, piston seals, guide bands, and sealing washers |
| Material Composition | High-grade industrial elastomers (Buna-N, Viton, or specialized compounds dependent on thermal tier) |
| Operating Temperature | Matches standard actuator ratings (-40°C to +80°C standard industrial tier) |
| Storage Requirements | Cool, dry, dark environment away from direct sunlight and ozone sources to prevent elastomer aging |
Compliance & Standards Alignment
- Manufactured in accordance with Metso’s strict factory material specifications, ISO quality standards, and global flow control guidelines.
- Ensures that serviced actuators maintain their original pressure containment and functional safety ratings.
Technical Note: When performing a scheduled overhaul using service kit 423161, always clean internal cylinder walls and moving metal components thoroughly. Inspect the cylinder bore and piston shaft for scoring or pitting before installing the new seals, and apply an approved factory-recommended lubricant to all elastomer surfaces during assembly.
Storage & Asset Preservation Guidelines
- Store the service kit unopened in its original manufacturer packaging to protect sensitive elastomer components from dust, ultraviolet light, and ozone degradation.
- Maintain storage areas at stable, moderate temperatures with relative humidity kept below 60%.
- Avoid placing heavy objects on top of the kit package to prevent deforming flexible components or seals.
Physical Installation Prerequisites
- Ensure that the actuator is completely isolated from pneumatic supply pressure, electrical control signals, and mechanical load before disassembly (apply strict LOTO procedures).
- Verify that the kit part number (
423161) matches the exact Bill of Materials (BOM) or service manual listing for your specific actuator model nameplate (A120 K-Ror equivalent). - Perform a full pressure and stroke test on the bench before remounting the actuator back onto the process valve pipeline.
Buyer’s FAQ & Logistics
Q: What Harmonized System (HS) code applies to this Metso service kit?
A: Industrial valve parts, actuator accessories, and rubber/elastomeric sealing components typically classify under HS code 8481.90 (Parts of taps, cocks, valves) or 4016.93 (Vulcanized rubber gaskets, washers and other seals). Confirm final details with your licensed customs broker.
Q: Does kit 423161 include mechanical metal parts like springs or pistons?
A: Typically, standard service kits contain soft goods (seals, O-rings, and wear rings). Major metallic components like springs, shafts, or pistons are generally ordered separately unless specified in a complete overhaul assembly list.
Q: Is the listed online price final for procurement?
A: Note: Price is subject to market availability, global logistics, and inventory status; contact our technical sales desk for a formal, time-sensitive quotation.
