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Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
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Festo
525211
Air solenoid valve MHE4-MS1H-3/2O-QS-8
The Festo 525211 is a 3/2-way monostable open industrial component featuring an 18 mm width, a 4 mm nominal width, and a normal nominal flow rate of 400 l/min normalized to DIN 1343. This electrical actuation pressure relief poppet valve utilizes a mechanical spring reset method, soft sealing principle, and an adjustable exhaust air function with QS-8 pneumatic working ports. Operating at 24V DC within an operating pressure range of -0.09 MPa to 0.8 MPa (-0.9 bar to 8 bar, -13.05 psi to 116 psi), the unit incorporates IP65 protection, non-detenting manual override, and any mounting position. It holds c UL us recognition and RCM compliance, alongside CE and UKCA markings per EMC and RoHS directives. Submit the exact part number, quantity, and application requirements to request 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
- 525211
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 525211.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Valve function
- 3/2-way, monostable, open
- Actuation type
- Electrical
- Width
- 18 mm
- Normal nominal ow rate (normalized to DIN 1343)
- 400 l/min
- Pneumatic working port
- QS-8
- Operating voltage
- 24V DC
- Operating pressure
- -0.09 MPa...0.8 MPa | -0.9 bar...8 bar | -13.05 psi...116 psi
- Structural design
- Pressure relief poppet valve
- Reset method
- Mechanical spring
- Degree of protection
- IP65
- Certication
- RCM compliance mark | c UL us - recognized (OL)
- CE marking (see declaration of conformity)
- As per EU EMC directive | As per EU RoHS directive
- UKCA marking (see declaration of conformity)
- To UK instructions for EMC | To UK RoHS instructions
- Nominal width
- 4 mm
- Width dimension
- 24 mm
- Note on grid dimension
- Minimum distance between the valves is 6 mm
- Exhaust air function
- Adjustable
- Sealing principle
- Soft
- Mounting position
- Any
- Manual override
- Non-detenting
- Type of control
- directly
- Flow direction
- Reversible with restrictions
- Lap
- Negative overlap
- Reverse polarity protection
- Bipolar
- Additional functions
- Spark arresting | Holding current reduction | Protective circuit
- Operating pressure, reversible
- -0.09 MPa...0.1 MPa | -0.9 bar...1 bar
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 525211. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.