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Festo
531791
Pressure regulator MS4N-LRB-1/4-D7-AS-BI-Z
The Festo 531791 is a size 4 industrial component from the MS series featuring a directly-controlled diaphragm regulator design with a looped-through compressed air supply and a rotary knob with an integrated lock actuator. This unit delivers a standard nominal flow rate of 640 l/min across a pressure control range of 0.5 to 12 bar, incorporating secondary exhaust, return flow capabilities, and an included pressure gauge with QS-8 pneumatic port connections. Constructed with an aluminum die cast subbase, it supports any assembly position and offers versatile mounting options including line installation, front panel installation, or accessory mounting. Submit the exact part number, quantity, and application requirements to request a quote.
Request pricing and availabilityCommercial response for your destination and required quantity.
Request a Quote- Manufacturer
- Festo
- Part number
- 531791
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531791.
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 integrated lock
- Assembly position
- Any
- Design structure
- directly-controlled diaphragm regulator | with looped-through compressed air supply
- Controller function
- Output pressure constant | with secondary exhaust | with return flow
- Pressure gauge
- with pressure gauge
- Pressure control range
- 0.5 ... 12 bar
- Inlet pressure 1
- 0.8 ... 14 bar
- Max. pressure hysteresis
- 0.25 bar
- Standard nominal flow rate
- 640 l/min
- Operating medium
- Compressed air
- Corrosion resistance classification CRC
- 2
- Storage temperature
- -10 ... 60 °C
- Medium temperature
- -10 ... 60 °C
- Ambient temperature
- -10 ... 60 °C
- Product weight
- 222 g
- Mounting type
- with accessories | Optional | Front panel installation | Line installation
- Pneumatic connection, port
- 2 QS-8
- Materials information for subbase
- Aluminum die cast
- Materials information for control panel
- POM | PA
- Materials information for seals
- NBR
- Materials information, housing
- Aluminum die cast
- Materials information for membrane
- NBR
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 531791. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.