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Festo
529521
Soft-start valve MS4-DE-1/4-V230
The Festo 529521 is an electrical 2/2 piston seat industrial component featuring a piloted control type, internal pilot air supply port, and non-reversible flow direction with a normal nominal flow rate of 2000 l/min normalized to DIN 1343. Operating at pressures from 4 bar to 14 bar, this unit utilizes a mechanical spring reset method, offers detenting and non-detenting manual override, supports any mounting position, and runs on a 230 V AC (50/60 Hz) coil with 3.0 VA initial power and 2.4 VA holding power at a 100% duty cycle. Certified as c UL us-recognized (OL) with a CRC rating of 2, it functions with compressed air meeting ISO 8573-1:2010 [7:4:4] or inert gases, permitting oil lubrication that is required for further use. 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
- 529521
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 529521.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Actuation type
- Electrical
- Mounting position
- Any
- Manual override
- Detenting | Non-detenting
- Structural design
- Piston seat
- Reset method
- Mechanical spring
- Type of control
- Piloted
- Pilot air supply port
- Internal
- Flow direction
- Non-reversible
- Valve function
- 2/2
- Switching position indication
- with accessories
- Operating pressure
- 4 bar...14 bar
- b-value
- 0.45
- C value
- 9.6 l/sbar
- Normal nominal ow rate (normalized to DIN 1343)
- 2000 l/min
- Duty cycle
- 100%
- Coil characteristics
- 230 V AC: 50/60 Hz, initial power 3.0 VA, holding power 2.4 VA
- Certication
- c UL us - recognized (OL)
- 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)
- Corrosion resistance class (CRC)
- 2 - Moderate corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- For use in the food industry
- See supplementary material information
- Temperature of medium
- -10 °C...60 °C
- Degree of protection
- IP65
- Ambient temperature
- -10 °C...60 °C
- Product weight
- 263 g
- Electrical connection
- Type C | Plug | As per DIN EN 175301-803 | Rectangular design
- Signal status display
- With accessories
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 529521. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.