MS4-LR-1/4-D6-AS – Pressure Regulator – Festo Compressed Air Regulator

USD $ 47.04

SKU: Festo 529417

Manufacturer Part Number: Festo 529417
Festo Compressed Air Regulator: MS4-LR-1/4-D6-AS
OEM Spec Ref 

The Festo MS4-LR-1/4-D6-AS Compressed Air Regulator, with MPN 529417, is a superior pneumatic pressure regulator designed to optimize the performance of pneumatic systems through precise pressure control and reliable operation. Engineered for seamless integration into various industrial applications, this regulator ensures consistent system pressure and enhanced operational efficiency.

Key Features:

  • Precise Pressure Regulation: Specifically engineered to provide exact control over system pressure, this regulator helps maintain desired operational conditions, guaranteeing peak performance.
  • Robust Construction: Built from high-quality materials, the MS4-LR-1/4-D6-AS is designed to endure the harsh conditions of industrial environments, ensuring long-lasting durability.
  • Compact and Versatile Design: Its compact size facilitates easy installation in space-constrained areas without compromising functionality, making it ideal for diverse system setups.
  • Easy Adjustment: Equipped with a straightforward adjustment mechanism, this regulator allows for quick and precise pressure settings, facilitating optimal system calibration.
  • Universal Compatibility: Compatible with a wide range of pneumatic systems, it can be seamlessly integrated into existing setups, providing great flexibility in system design.


  • Enhanced System Efficiency: By maintaining optimal pressure, this regulator contributes to the efficiency and reliability of pneumatic processes, boosting overall system performance.
  • Reduced Operational Costs: It helps minimize energy consumption by optimizing pressure levels, which can lead to significant cost savings.
  • 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.
  • Control Systems: Plays a critical role in control systems where stable and accurate pressure is necessary for proper functionality.
  • Testing and Inspection: Ideal for use in systems that require consistent pressure for accurate testing and inspection procedures.
  • General Pneumatics: Suitable for a broad range of pneumatic applications across various industries, enhancing operational precision and reliability.

The Festo MS4-LR-1/4-D6-AS Compressed Air Regulator stands as a testament to 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 … 7 bar
Max. pressure hysteresis 0.025 MPa
Max. pressure hysteresis 0.25 bar
Max. pressure hysteresis 3.625 psi
Standard nominal flow rate 1800 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