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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
540821
Air solenoid valve MDH-5/3E-D-3-M12D-C
The Festo part number 540821 is an electrical 5/3 exhausted piston gate valve featuring a 65 mm width, a 14.5 mm nominal width, and a normal nominal flow rate of 4600 l/min according to DIN 1343. This piloted component operates on 24V DC within an operating pressure range of 3 bar to 10 bar, utilizing internal pilot air supply, an ISO 5599-1 size 3 sub-base or G1/2 pneumatic working port, and a soft sealing principle with an IP65 degree of protection. Additional functional attributes include a mechanical spring reset method, adjustable exhaust air function, non-detenting manual override, and a 71 mm width dimension while conforming to ISO 5599-1 standards for any mounting position. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
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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
- 540821
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 540821.
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Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Valve function
- 5/3 exhausted
- Actuation type
- Electrical
- Width
- 65 mm
- Normal nominal ow rate (normalized to DIN 1343)
- 4600 l/min
- Pneumatic working port
- Sub-base, size 3 as per ISO 5599-1 | G1/2
- Operating voltage
- 24V DC
- Operating pressure
- 3 bar...10 bar
- Structural design
- Piston gate valve
- Reset method
- Mechanical spring
- Degree of protection
- IP65
- Nominal width
- 14.5 mm
- Width dimension
- 71 mm
- Exhaust air function
- Adjustable
- Sealing principle
- Soft
- Mounting position
- Any
- Conforms to standard
- ISO 5599-1
- Manual override
- Non-detenting
- ISO code
- 357
- Type of control
- Piloted
- Pilot air supply port
- Internal
- Flow direction
- Non-reversible
- Lap
- Positive overlap
- Switching time off
- 84 ms
- On switching time
- 36 ms
- Duty cycle
- 100%
- Max. positive test pulse with 0 signal
- 3800 µs
- Max. negative test pulse on 1 signal
- 4900 µs
- Coil characteristics
- 24 V DC: 2.7 W
- Permissible voltage uctuations
- +/- 10%
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:4:4]
- 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 540821. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.