Overview
The Festo MS6-EM1-1/2-S (part number 541268) is a manual 3/2-way bistable on/off valve engineered for pressurizing and venting pneumatic installations. This rotary slide valve features direct piloting, a built-in silencer, and straightforward manual operation via rotary knob—ideal for maintenance technicians and system integrators who require straightforward, reliable control.
Key Features
- 3/2-way bistable design for on/off pneumatic control
- Manual rotary slide valve actuation with secure padlock provision
- Integrated silencer; exhaust air can also be externally ducted at port 3
- Direct pilot control mode for responsive switching
- Nominal flow rate of 8,700 L/min at maximum rated pressure
- Reversible flow direction capability
Technical Specifications
- Valve Type: 3/2-way on/off bistable control valve
- Design: Rotary slide valve with manual actuation
- Operating Pressure Range: 0–18 bar (standard)
- Normal Nominal Flow Rate: 8,700 L/min (at rated pressure, normalized to DIN 1343)
- C-Value: 30.8 L/s·bar
- b-Value: 0.57
- Pilot Control Mode: Direct
- Port Configuration: Ports 1 & 2 = G1/2″ (female threaded); Port 3 = G1/2″ exhaust/silencer
- Operating Temperature Range: −10 °C to +60 °C
- Operating Medium: Compressed air per ISO 8573-1:2010 [7:4:4]; inert gases; oil-lubricated operation possible
- Material: Die-cast aluminum body
- Weight: Approximately 725.87 g
- Mounting Dimensions (Width): 62 mm
- Compliance: ISO 1179-1, ISO 228-1 standards; RoHS compliant; moderate corrosion resistance
Typical Applications
The MS6-EM1-1/2-S is widely used in:
- Pneumatic system pressurization and venting in manufacturing plants
- Manual on/off control in compressed air distribution lines
- Soft-start and pressure regulation applications
- Industrial machine tool and automation systems requiring operator-controlled isolation
- Maintenance and emergency shutoff roles in pneumatic circuits
- Air preparation and conditioning modules (FRL assemblies)
Compatibility & Replacements
Compatible With
- Standard ISO pneumatic systems and networks
- Compressed air tools and actuators rated for 0–18 bar
- Industrial PLC/automation control systems requiring on/off valve integration
- Festo modular air-preparation components and ductwork (standard G1/2″ BSPP)
- External silencers and pressure gauges (available separately)
Replaces / Drop-In Replacement For
- Earlier or OEM-equivalent Festo MS6-EM1 manual on/off valves
- Generic G1/2″ manual 3/2-way bistable valves with similar port sizing and pressure ratings
- Verify compatibility with your system integrator before ordering.
Works With
- ISO 1179-1 and ISO 228-1 compliant pneumatic systems
- Festo pneumatic design software and component configurators
- Compressed air treatment and regulation modules (filter-regulator-lubricator sets)
- External pressure sensors and display units (available as Festo accessories)
- Padlock security provision for manual control lockout/tagout procedures
