MS4-LR-1/4-D5-AS – Pressure Regulator – Festo Compressed Air Regulator

USD $ 62.37

SKU: Festo 529415

Manufacturer Part Number: Festo 529415
Festo Compressed Air Regulator: MS4-LR-1/4-D5-AS
OEM Spec Ref 

The Festo MS4-LR-1/4-D5-AS Compressed Air Regulator, with MPN 529415, is a highly efficient device designed to optimize the performance of pneumatic systems through precise pressure control and reliable operation. This regulator is ideally suited for a range of industrial applications, ensuring consistent system pressure and enhanced operational efficiency.

Key Features:

  • Precise Pressure Regulation: Engineered to provide exact control over system pressure, this regulator maintains desired operational conditions, ensuring peak performance and reliability.
  • Robust Construction: Constructed from high-quality materials, the MS4-LR-1/4-D5-AS is designed to withstand the harsh conditions of industrial environments, offering long-lasting durability.
  • Compact and Versatile Design: Its compact size facilitates easy installation in space-constrained areas without sacrificing functionality, making it ideal for various system configurations.
  • Easy Adjustment: Features a straightforward adjustment mechanism for quick and precise pressure settings, enabling optimal system calibration and ease of use.
  • Universal Compatibility: Compatible with a wide range of pneumatic systems, it can be seamlessly integrated into existing setups, offering great flexibility in system design.


  • Enhanced System Efficiency: By maintaining optimal pressure, this regulator contributes to the efficiency and reliability of pneumatic processes, enhancing overall system performance.
  • Reduced Operational Costs: The regulator helps minimize energy consumption by optimizing pressure levels, leading to significant cost savings over time.
  • Increased Equipment Lifespan: Proper pressure regulation prevents wear and tear on pneumatic components, extending their lifespan and reducing maintenance needs.
  • Improved Safety: Consistent and reliable pressure control ensures safer operation of pneumatic systems, adhering to stringent safety standards.


  • Manufacturing Facilities: Essential for maintaining precise pressure in automated manufacturing lines, ensuring high-quality production outcomes and operational consistency.
  • Control Systems: Plays a critical role in control systems where stable and accurate pressure is necessary for proper functionality and system integrity.
  • Testing and Inspection: Ideal for use in systems that require consistent pressure for accurate testing and inspection procedures, crucial in maintaining quality standards.
  • General Pneumatics: Suitable for a broad range of pneumatic applications across various industries, enhancing operational precision and reliability.

The Festo MS4-LR-1/4-D5-AS Compressed Air Regulator stands as a hallmark of Festo’s dedication to advancing pneumatic technology, providing a sophisticated solution for managing system pressure and optimizing the performance of industrial processes. This regulator is a key component in ensuring efficient and safe pneumatic operations in diverse industrial settings.

Technical Data

Feature Specification
Size 4
Series MS
Actuator lock Rotary knob with detent
can be closed with accessories
Mounting position Any
Structural design Directly controlled diaphragm regulator
Controller function Outlet pressure constant
With secondary exhausting
With return flow function
Symbol 00991558
Pressure gauge with pressure gauge
Operating pressure 0.08 MPa … 1.4 MPa
Operating pressure 0.8 bar … 14 bar
Pressure regulation range 0.3 bar … 4 bar
Max. pressure hysteresis 0.025 MPa
Max. pressure hysteresis 0.25 bar
Max. pressure hysteresis 3.625 psi
Standard nominal flow rate 2100 l/min
Operating medium Compressed air as per ISO 8573-1:2010 [7:4:4] Inert gas
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
Storage temperature -10 °C … 60 °C
For use in the food industry See supplementary material information
Temperature of medium -10 °C … 60 °C
Ambient temperature -10 °C … 60 °C
Product weight 225 g
Type of mounting Optionally:
Front panel mounting
Line installation
With accessories
Pneumatic connection 1 G1/4
Pneumatic connection 2
Note on materials RoHS-compliant
Material of sub-base Die-cast aluminum
Material of operator panel PA
Seals material NBR
Housing material Die-cast aluminum
Diaphragm material NBR
Weight 0.225 kg