Precise Regulation for Demanding Pneumatic Circuits
The Festo MS4-LR-1/4-D6-A8-E11 (manufacturer ID 8190236) is a directly controlled diaphragm regulator designed to maintain a constant outlet pressure in compressed air and inert gas systems. Its core strength lies in the low pressure hysteresis of 3.625 psi, which ensures that the set pressure remains stable even when flow rates fluctuate. This makes it suitable for applications where repeatable actuation or consistent force is critical, such as in clamping, tensioning, or spray-coating processes.
The regulator covers a pressure regulation range of 0.3 bar to 7 bar, while accepting an operating pressure up to 14 bar. With a standard nominal flow rate of 1800 l/min, it can supply high-demand circuits without significant droop. The G1/4 ports and size 4 body fit neatly into MS series modular setups, allowing you to build a compact air preparation unit without compromising on performance.
Built for Real-World Operating Conditions
This unit is engineered to operate reliably across a temperature span of -10°C to 60°C for both ambient and medium conditions. The die-cast aluminum housing and sub-base, combined with NBR seals and diaphragm, provide a robust construction that withstands moderate industrial stress. Its corrosion resistance class (CRC 2) indicates suitability for environments with moderate corrosive exposure, such as humid workshops or light machining areas.
The regulator is also LABS (PWIS) conformant to VDMA24364-B1/B2-L, which means it is free from paint-wetting impairment substances. This is a critical factor for paint shops or finishing lines where silicone contamination can ruin the surface quality. If you operate in the food industry, consult the supplementary material information for specific suitability guidance.
Flexible Integration and Secure Handling
One of the standout features is the rotary knob with an integrated lock. This prevents accidental changes to the pressure setting, especially in environments with vibration or where operators might brush against the knob. The lock mechanism adds a layer of safety and consistency to your process.
Mounting is highly versatile: you can install the regulator in any position, and it supports front panel mounting, line installation, or use with accessories. This flexibility simplifies system design, whether you are retrofitting an existing machine or building a new control cabinet. The unit also includes a secondary exhausting function and a return flow function, which help manage downstream pressure release and improve system response.
Maintenance and Media Compatibility
The MS4-LR-1/4-D6-A8-E11 is designed for compressed air per ISO 8573-1:2010 [7:4:4] and inert gases. If you need to use oil-lubricated air, the regulator can handle it, but note that oil lubrication is required for further use after such operation. This is an important consideration for maintenance planning.
The unit is RoHS-compliant, and its materials—die-cast aluminum and NBR—are chosen for durability and compatibility with standard industrial media. At a weight of 350 g, it is light enough for line mounting without additional support, yet sturdy enough for long-term service.
Practical Selection Considerations
When specifying this regulator, verify that your required outlet pressure falls within the 0.3–7 bar range and that your supply pressure does not exceed 14 bar. The G1/4 connections are standard for many pneumatic circuits, but check your existing fittings. If you need a pressure gauge, the unit is prepared for a G1/8 gauge, allowing you to monitor outlet pressure directly.
For engineers and procurement teams, the Festo MS4-LR-1/4-D6-A8-E11 offers a balanced combination of precision, flow capacity, and environmental tolerance. Its lockable adjustment and flexible mounting reduce installation complexity, while the corrosion resistance and LABS conformity broaden its applicability across industrial sectors. This regulator is a practical choice for maintaining stable pneumatic performance in a wide range of automated equipment.