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Festo
531221
Filter regulator MS4N-LFR-1/4-D6-ERM-AS
The Festo 531221 is an MS-series size 4 filter regulator featuring an integrated pressure gauge, a manual rotating condensate drain with a 19 ml maximum volume capacity, and a plastic bowl guard. It operates within a 0.8 bar to 14 bar operating pressure range, delivers a pressure regulation range of 0.3 bar to 7 bar, and maintains a normal nominal flow rate of 1700 l/min for compressed air as per ISO 8573-1:2010 [-:4:-] and inert gases. This component incorporates a 40 µm filtration grade, a constant output pressure controller function with secondary exhausting and return flow characteristic, and a rotary knob actuator lock with detent that can be closed with accessories. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
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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
- 531221
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531221.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Size
- 4
- Series
- MS
- Actuator lock
- Rotary knob with detent | can be closed with accessories
- Mounting position
- Vertical ±5°
- Grade of ltration
- 40 µm
- Condensate drain
- Manual, rotating
- Structural design
- Filter regulator with pressure gauge
- Max. condensate volume
- 19 ml
- Controller function
- Constant output pressure | With secondary exhausting | With return ow characteristic
- Bowl guard
- Plastic bowl guard
- Degree of condensate separation
- 75 %
- Pressure gauge
- with pressure gauge
- Operating pressure
- 0.08 MPa...1.4 MPa | 0.8 bar...14 bar
- Pressure regulation range
- 0.3 bar...7 bar
- Max. pressure hysteresis
- 0.25 bar
- Normal nominal ow rate (normalized to DIN 1343)
- 1700 l/min
- Operating medium
- Compressed air as per ISO 8573-1:2010 [-:4:-] | Inert gases
- Corrosion resistance class (CRC)
- 2 - Moderate corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Storage temperature
- -10 °C...60 °C
- For use in the food industry
- See supplementary material information
- Air quality class at the output
- Compressed air as per ISO 8573-1:2010 [7:4:4]
- Temperature of medium
- -10 °C...60 °C
- Ambient temperature
- -10 °C...60 °C
- Pore size
- 40 µm
- Product weight
- 275 g
- Type of mounting
- Alternatively: | Front panel mounting
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 531221. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.