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Description

The Festo MS9-LFM-B (Festo part number 553037) is a fine-filter cartridge in the MS series compressed air treatment system, designed as a replacement element for MS9-LFM fine and micro filter housings. This part is also cross-referenced as MS9LFM-B and is the standard-flow-rate counterpart to the high-flow variant MS9-LFM-B-HF (part number 552945). Refer to manufacturer documentation to confirm compatibility with your specific application.

This cartridge is a borosilicate fibre coalescing filter element rated at One (1) µm filtration grade, achieving ISO class 2 for particles with a filter efficiency of 99.99%. It removes oil aerosols and fine particulates from compressed air, delivering output air quality of class 2.7.3 per DIN ISO 8573-1. The cartridge is free of copper and PTFE, with a corrosion resistance classification CRC2 for moderate corrosion environments.

The MS9-LFM-B cartridge fits MS9-size filter housings operating at supply pressures from 0 to 20 bar, across a flow range of 325 to 10,000 l/min. It is recommended to use the MS9-LFM-B as a pre-filter upstream of a 0.01 µm micro-filter (MS9-LFM-A) to extend cartridge service life in high-contamination systems. Replacement is recommended after 1,000 operating hours at 21 °C; service life decreases at elevated temperatures.

Technical Specifications

Brand: Festo
MPN: MS9-LFM-B
Festo Part Number: 553037
Type: Filter Element (Fine-Filter Cartridge)
Series: MS (MS9 Size)
Filtration Style: Coalescing Filter
Grade of Filtration: 1 µm
Filter Efficiency: 99.99%
Air Purity Class Output: ISO 8573-1 Class 2.7.3
ISO Particle Class: 2 (max. particle density 1 mg/m³)
ISO Oil Aerosol Class: 3 (max. oil concentration 1 mg/m³)
Supply Pressure: 0–20 bar (0–290 psi)
Flow Rate: 325–10,000 l/min
Temperature Range: –10 to +60 °C
Filter Medium: Borosilicate Fibre
Materials: Free of copper and PTFE
Corrosion Resistance Classification: CRC2 – Moderate
Mounting/Installation: Vertical ±5°
Grid Dimension (Housing): 90 mm
Recommended Replacement Interval: 1,000 operating hours at 21 °C
Conforms To: ISO 1179-1, ISO 228-1, DIN ISO 8573-1
High-Flow Variant: MS9-LFM-B-HF (Festo part no. 552945)

Condition: New — Open Box. Sourced from manufacturing MRO turnover, plant closures, and industrial surplus; the part is new and unused but may have been in storage for years. Packaging may show shelf wear or be missing.

Shipping & Handling

Domestic shipping via USPS Ground Advantage, USPS Priority Mail, or UPS Next Day Air. Cost is calculated at checkout based on your location. We ship within 1 business day.
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Local pickup is available — message us ahead of time to coordinate.
UPS Next Day Air orders: Cutoff is 2pm Eastern for guaranteed same-day shipout. We can usually work later orders in if we know they're coming, so message us — we just can't work magic every time.
Shipping on your own UPS or FedEx account? No problem. This package ships at approximately 10.00 × 6.00 × 6.00 inches and 1.00 lb 4.00 oz. Send a message before checkout with your account number and shipping method.

Returns

We offer free returns through eBay's standard 30-day return policy. If something isn't right, message us first — we want to make it right and we'll work with you to do it.

About ACME MRO Solutions

We started ACME MRO Solutions to fix something we kept running into as contractors — plants down, parts slow, surplus listings you couldn't trust. Our goal is simple: get YOU the right component fast, with an honest description, so you can get back to running.

We describe what we see. Used items show signs of use; if a part has visible wear, damage, or a missing component, the condition description will say so. We don't claim anything is tested unless we tested it — and we don't bench-test parts where testing isn't practical or revealing (feed-through modules, breakers, mechanical components). When we do test something, we'll say so explicitly.

If something is our fault, we don't work through it — we make it right. We are proud to serve American manufacturing. Your uptime is our bottom line.

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Questions? Talk to us.

Send a message through eBay. During business hours we typically respond within the hour. Whether you need to confirm compatibility before buying, request additional photos, ask about a cross reference, or work through something after delivery — message first and we'll figure it out together.