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Festo
531786
Pressure regulator MS4N-LRB-1/4-D5-AS-BI
The Festo part number 531786 is an industrial component featuring a size 4 MS series directly controlled diaphragm regulator with continuous compressed air supply and a constant output pressure function including secondary exhausting and return flow characteristic. It operates within a pressure regulation range of 0.3 bar to 4 bar, an operating pressure of 0.8 bar to 14 bar, and provides a normal nominal flow rate of 650 l/min using compressed air or inert gases. The unit weighs 222 g, incorporates a rotary knob with detent actuator lock that can be closed with accessories, and supports in-line installation, front panel mounting, or mounting with accessories in any position. Submit the exact part number, quantity, and application requirements to receive a quote for this component.
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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
- 531786
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531786.
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
- Any
- Structural design
- Directly controlled diaphragm regulator | with continuous compressed air supply
- Controller function
- Constant output pressure | With secondary exhausting | With return ow characteristic
- Operating pressure
- 0.8 bar...14 bar
- Pressure regulation range
- 0.3 bar...4 bar
- Max. pressure hysteresis
- 0.25 bar
- Normal nominal ow rate (normalized to DIN 1343)
- 650 l/min
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:4:4] | Inert gases
- Information on operating and pilot media
- Operation with oil lubrication possible (required for further use)
- 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
- Temperature of medium
- -10 °C...60 °C
- Ambient temperature
- -10 °C...60 °C
- Product weight
- 222 g
- Type of mounting
- Alternatively: | Front panel mounting | In-line installation | With accessories
- Pneumatic connection 1
- 1/4 NPT
- Pneumatic connection 2
- QS-8
- Note on materials
- RoHS compliant
- Material of sub-base
- Die-cast aluminum
- Material of operator panel
- PA
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 531786. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.