MFH-3-1/2 Tiger Classic Solenoid Valve Festo 9857
The Festo MFH-3-1/2 (9857) is a heavy-duty, high-flow 3/2-way single solenoid valve from the highly dependable Tiger Classic family. Built for demanding industrial automation environments, this monostable valve is normally closed (NC) and features an internal pilot air design paired with a mechanical spring return. This configuration ensures the valve safely returns to its default closed state when electrical power is disconnected.
Constructed from rugged die-cast aluminum with a high-capacity plate seat design, it delivers an impressive nominal flow rate of up to 3,700 l/min through standard G1/2 female threaded ports. Its wide 52 mm frame profile handles heavy air volumes efficiently, making it perfect for driving larger pneumatic processes. It also includes a detenting manual override to assist operators with easy physical system setup, commissioning, and testing cycles.
Feature | Value |
|---|---|
Manufacturer | Festo |
Part Number | 9857 |
Product Series | Tiger Classic (MFH) |
Valve Function | 3/2-way, Single Solenoid, Normally Closed (NC) |
Type of Actuation | Electrical (Via F-Series Solenoid Coil, ordered separately) |
Design Structure | Plate Seat with Mechanical Spring Reset |
Type of Piloting | Piloted (Internal Pilot Air) |
Pneumatic Connection | G1/2 female thread (Ports 1, 2, and 3) |
Pilot Exhaust Air Port (82) | M5 |
Standard Nominal Flow Rate | 3,700 l/min |
Operating Pressure | 1.5 bar to 8 bar (0.15 MPa to 0.8 MPa) |
Nominal Size (Bore) | 14 mm |
Construction Width | 52 mm |
Switching Time (On / Off) | 18 ms / 90 ms |
Degree of Protection | IP65 (with plug socket attached) |
Ambient / Medium Temperature | -5°C to 40°C / -10°C to 60°C |
Housing / Seals Material | Die-cast Aluminum / NBR (Nitrile Rubber) |
Manual Override | Detenting |
Flow Direction | Non-reversible |
Operating Medium | Compressed air in accordance with ISO 8573-1:2010 [7:4:4] |
Product Weight | 1,100 g (1.1 kg) |
Approvals | c UL us - Recognized (OL), RoHS Compliant |
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- Started from: Jul 10, 2025
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