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Festo
527691
Pressure regulator MS4N-LR
The Festo 527691 is an MS-series size 4 pressure regulator featuring a structural design with a pressure gauge, rotary knob with detent and integrated lock, and constant output pressure controller function with secondary exhausting and return flow characteristics. This component operates within an inlet pressure range of 0.08 MPa to 1.4 MPa and a pressure regulation range of 0.3 bar to 12 bar, delivering a normal nominal flow rate between 1000 l/min and 2200 l/min for compressed air as per ISO 8573-1:2010 [7:4:4] or inert gases. Certified as c UL us recognized and bearing the CE mark as per the EU explosion protection directive (ATEX), the unit is rated for ATEX zones 1, 2, 21, and 22 in explosive ambient temperatures from -10°C to +60°C. Submit the exact part number, quantity, and application requirements to receive an official 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
- 527691
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 527691.
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 | Rotary knob with integrated lock | can be closed with accessories
- Mounting position
- Any
- Structural design
- Pressure regulator with pressure gauge
- Controller function
- Constant output pressure | With secondary exhausting | With return ow characteristic
- Pressure gauge
- Set up for G1/4 | Set up for G1/8 | With pressure sensor | with pressure gauge
- Operating pressure
- 0.08 MPa...1.4 MPa | 0.8 bar...14 bar
- Pressure regulation range
- 0.3 bar...12 bar
- Max. pressure hysteresis
- 0.025 MPa | 0.25 bar | 3.625 psi
- Normal nominal ow rate (normalized to DIN 1343)
- 1000 l/min...2200 l/min
- Certication
- c UL us - recognized (OL)
- CE marking (see declaration of conformity)
- as per EU explosion protection directive (ATEX)
- Explosion prevention and protection
- Zone 1 (ATEX) | Zone 2 (ATEX) | Zone 21 (ATEX) | 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 T60°C Db X
- Explosive ambient temperature
- -10°C <= Ta <= +60°C
- 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)
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 527691. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.