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Festo
531781
Pressure regulator MS4N-LRB-1/4-D5-VS-AS-Z
The Festo part number 531781 is a size 4 industrial component from the MS series featuring a directly-controlled diaphragm regulator design with a looped-through compressed air supply, a rotary knob actuator lock with an integrated lock, and an aluminum die cast subbase that is free of copper and PTFE. It provides a pressure control range of 0.3 to 4 bar, an inlet pressure 1 of 0.8 to 14 bar, a maximum pressure hysteresis of 0.25 bar, a standard nominal flow rate of 1,900 l/min, and 2 NPT1/4-18 pneumatic connection ports while supporting any assembly position and weighing 222 g. Submit your exact part number, quantity, and application requirements to request a quote.
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Request a Quote- Manufacturer
- Festo
- Part number
- 531781
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531781.
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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 control range
- 0.3 ... 4 bar
- Inlet pressure 1
- 0.8 ... 14 bar
- Max. pressure hysteresis
- 0.25 bar
- Standard nominal flow rate
- 1,900 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 NPT1/4-18
- Materials note
- Free of copper and PTFE
- 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 531781. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.