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Festo
5271797
Filter regulator LFR-1/2-D-O-MIDI-T3-EX4
The Festo 5271797 is a Midi size Series D filter regulator without a pressure gauge, featuring a rotary knob with detent actuator lock and a manual rotating condensate drain with a maximum condensate volume of 42 cm³. Designed for vertical mounting within ±5°, this structural design includes an integrated metal bowl guard, a 40 µm grade of filtration, and a pressure gauge set up for G1/4. It operates at a pressure range of 1 bar to 20 bar, provides a pressure regulation range of 0.5 bar to 12 bar with a maximum pressure hysteresis of 2.9 psi, and delivers a normal nominal flow rate of 3400 l/min normalized to DIN 1343. Certified for explosion prevention and protection in ATEX and UKEX Zone 1, Zone 2, Zone 21, and Zone 22, it carries II 2G gas and II 2D dust ATEX categories alongside EPL Db and EPL Gb certifications outside the EU. Submit the exact part number, quantity, and application requirements to receive a formal 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
- 5271797
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 5271797.
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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...12 bar
- Max. pressure hysteresis
- 0.02 MPa | 2.9 psi
- Normal nominal ow rate (normalized to DIN 1343)
- 3400 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 5271797. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.