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Festo
173721
Fine filter LFMB-3/4-D-MAXI-A-NPT
The Festo part number 173721 is a D series Maxi industrial component designed for compressed air in accordance with ISO 8573-1:2010 [6:8:4] or inert gases, operating within a pressure range of 2 bar to 12 bar. Featuring a 1 µm grade of filtration, 99.99 % filter efficiency, fully automatic condensate drain, and a metal bowl guard, it delivers an output air quality class of ISO 8573-1:2010 [5:7:3] with a residual oil content of 0.5 mg/m³ and standard flow rates between 750 l/min and 2220 l/min. The unit includes 3/4 NPT pneumatic connections for 1 and 2, supports vertical in-line installation or mounting with a retaining bracket, and functions at a medium temperature of 1.5 °C to 60 °C and ambient temperature of -10 °C to 60 °C under a CRC 2 moderate corrosion stress rating. Submit the exact part number, quantity, and application requirements for a quote.
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Request a QuoteWhy no listed price?
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
- Manufacturer
- Festo
- Part number
- 173721
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 173721.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Series
- D
- Size
- Maxi
- Grade of ltration
- 1 µm
- Condensate drain
- Fully automatic
- Operating pressure
- 2 bar...12 bar
- Operating medium
- Compressed air as per ISO 8573-1:2010 [6:8:4] | Inert gases
- Air quality class at the output
- Compressed air as per ISO 8573-1:2010 [5:7:3] | Inert gases
- Max. standard ow rate for air quality class
- 2220 l/min
- Min. standard ow rate for air quality class
- 750 l/min
- Filter efficiency
- 99.99 %
- Bowl guard
- Metal bowl guard
- Corrosion resistance class (CRC)
- 2 - Moderate corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Temperature of medium
- 1.5 °C...60 °C
- Ambient temperature
- -10 °C...60 °C
- Residual oil content
- 0.5 mg/m³
- Type of mounting
- Alternatively: | In-line installation | With retaining bracket
- Mounting position
- Vertical
- Pneumatic connection 1
- 3/4 NPT
- Pneumatic connection 2
- 3/4 NPT
- Housing material
- Die-cast zinc
- Compressed air lter material
- Borosilicate glass ber
- Material of bowl
- PC
- Note on materials
- RoHS compliant
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 173721. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.