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Festo
5271803
Filter regulator LFR-N1/4-D-16-O-MIDI-T3-EX4
The Festo 5271803 is a Series D Midi size filter regulator featuring a structural design without a pressure gauge, a rotary knob with detent actuator lock, and a 40 µm grade of filtration. Operating within a pressure range of 1 bar to 20 bar with a pressure regulation range of 0.5 bar to 16 bar, it delivers a normal nominal flow rate of 1190 l/min and incorporates a manual rotating condensate drain with a maximum condensate volume of 42 cm³, an integrated metal bowl guard, and a G1/4 setup for a pressure gauge. Certified for Zone 1, Zone 2, Zone 21, and Zone 22 hazardous areas under ATEX and UKCA directives with EPL Db and EPL Gb ratings, the unit mounts vertically within ±5°. Submit the exact part number, quantity, and application requirements for a quote.
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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
- 5271803
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 5271803.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Size
- Midi
- Series
- D
- Actuator lock
- Rotary knob with detent
- Mounting position
- Vertical ±5°
- Grade of ltration
- 40 µm
- Condensate drain
- Manual, rotating
- Structural design
- Filter regulator without pressure gauge
- Max. condensate volume
- 42 cm³
- Bowl guard
- Integrated as metal bowl
- Pressure gauge
- Set up for G1/4
- Operating pressure
- 0.1 MPa...2 MPa | 1 bar...20 bar
- Pressure regulation range
- 0.5 bar...16 bar
- Max. pressure hysteresis
- 0.02 MPa | 2.9 psi
- Normal nominal ow rate (normalized to DIN 1343)
- 1190 l/min
- CE marking (see declaration of conformity)
- as per EU explosion protection directive (ATEX)
- UKCA marking (see declaration of conformity)
- acc. to UK EX instructions
- Explosion protection certication outside the EU
- EPL Db (GB) | EPL Gb (GB)
- Explosion prevention and protection
- Zone 1 (ATEX) | Zone 1 (UKEX) | Zone 2 (ATEX) | Zone 21 (ATEX) | Zone 21 (UKEX) | Zone 22 (ATEX)
- ATEX category gas
- II 2G
- ATEX category for dust
- II 2D
- Type of ignition protection for gas
- Ex h IIC T6 Gb X
- Type of (ignition) protection for dust
- Ex h IIIC T85°C Db X
- Explosive ambient temperature
- -40°C <= Ta <= +80°C
- Operating medium
- Compressed air as per ISO 8573-1:2010 [-:9:-] | Inert gases
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
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 5271803. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.