Product Core Brief
- Model: A413125
- Brand: Metso (Neles / Valmet Field Instrument Accessories)
- Series: OEM service spare filter cartridge for A413xx series pneumatic filter regulators
- Core Function: Remove compressor oil aerosols, condensed water, and pipeline particulate contaminants from instrument air to protect ND9000 series valve positioner internal pilot valves.
- Product Type: Disposable coalescing stainless steel filter replacement cartridge
- Key Specs: 5 μm filtration grade | 99% liquid aerosol separation efficiency | Fits all A413331 / A413240 / A413139 regulator housings
- Condition: New Original (New Surplus); Active OEM production spare part with continuous factory stock availability.
Key Technical Specifications
- Filtration media: Multi-layer sintered stainless steel coalescing mesh
- Particle capture rating: 5 μm solid particulate cutoff
- Liquid separation efficiency: >99% removal of oil and water aerosols at standard instrument air flow rates
- Operating pressure range: 1.4 bar minimum to 10 bar maximum instrument air supply
- Operating ambient temperature: -20°C to +70°C; storage range -40°C to +85°C
- Service life interval: 6–12 month replacement cycle under typical pulp, chemical, or oil & gas plant air quality
- Physical dimensions: Drop-in fit for A413331, A413240, A413139 filter regulator bowl assemblies
- Compliance: ATEX non-electrical pneumatic component certification for Zone 1/2 hazardous process areas
- Construction: Corrosion resistant stainless steel media with integrated support cage to prevent media collapse under air flow fluctuations
- Max allowable flow differential: 0.15 bar pressure drop at full rated regulator throughput before service replacement is required
Product Introduction
Metso is the factory-specified service cartridge for all mid-size Metso pneumatic filter regulators paired with ND9102HX and ND9103HX intelligent valve positioners. It traps airborne compressor lubricant and condensed moisture that would otherwise foul precision pilot spools and cause valve hunting or permanent positioning drift.
Its multi-layer stainless coalescing mesh delivers consistent separation performance across varying air flow loads. Generic aftermarket filter inserts use thinner media that saturate quickly, increasing maintenance frequency and risking unplanned control valve performance loss on critical process loops. The unit installs without specialized tools during standard weekly condensate drain service routines.
Firmware/Software Versions & Upgrade Notes
This is a mechanical pneumatic spare part with no embedded electronics, firmware, or software. No configuration software, flash updates, or digital parameter mapping applies to the component. All compatibility is purely mechanical and dimensional.
Frequently Asked Questions
- Can I replace this filter cartridge while the valve assembly remains pressurized?Isolate and vent instrument air supply upstream of the filter regulator before removing the bowl to swap the cartridge. Pressurized bowl removal creates sudden air pressure spikes that can force water/oil contaminants downstream into the ND9xxx positioner pilot valve assembly.
- Are aftermarket generic filter inserts a valid long-term substitute for this OEM cartridge?Generic low-cost inserts use single-layer media with reduced liquid separation capacity. They saturate in 2–3 months instead of the OEM 6–12 month service window, raising maintenance labor hours and increasing risk of positioning drift on closed-loop process valves. New Surplus OEM inventory eliminates this performance compromise.
- Does this component fit all Metso air filter regulator models?This insert is sized exclusively for A413331, A413240, and A413139 medium/low flow regulators. High-flow A413337 regulators require a larger separate filter cartridge part number and cannot accept the unit without permanent housing modification.
- What warranty coverage comes with New Surplus OEM spare filter cartridges compared to aftermarket alternatives?Our New Surplus OEM stock carries a 12-month shelf-life warranty against manufacturing defects. Aftermarket unbranded inserts ship with zero manufacturer-backed coverage; media degradation or poor fit cannot be remedied via vendor replacement if field performance fails.
- Why is OEM New Surplus filter media priced higher than generic aftermarket equivalents?New Surplus OEM cartridges maintain factory controlled media thickness and micron grading, validated through Metso’s air flow contamination testing. Generic units cut material costs by reducing stainless mesh layers, which shortens service intervals and introduces unplanned process variability that outweighs initial component savings.
- How do I identify when the cartridge requires scheduled replacement?Monitor pressure differential across the filter regulator. Once differential pressure exceeds 0.15 bar at standard operating flow, the media is saturated and the cartridge must be replaced immediately to prevent contaminant carryover to the connected valve positioner.
- Can the filter cartridge be cleaned and reused to extend service life?Sintered coalescing media permanently traps oil and fine particulate once saturated. Washing or blowing compressed air through the mesh damages the layered coalescing structure, eliminating liquid separation capability. The cartridge is a single-use disposable service component only.
