MS4-LR-1/4-D7-AS – Pressure Regulator – Festo Compressed Air Regulator

USD $ 89.25

SKU: Festo 529419

Manufacturer Part Number: Festo 529419
Festo Compressed Air Regulator: MS4-LR-1/4-D7-AS
OEM Spec Ref 

The Festo MS4-LR-1/4-D7-AS Compressed Air Regulator, with MPN 529419, is a high-precision pneumatic pressure regulator designed to provide meticulous control over air pressure in diverse industrial applications. This regulator is engineered to optimize pneumatic system performance by ensuring consistent pressure management and enhanced operational efficiency.

Key Features:

  • Precise Pressure Control: Delivers exact control over system pressure, maintaining optimal operational conditions and ensuring peak performance across various applications.
  • Robust Construction: Constructed from durable materials, the MS4-LR-1/4-D7-AS is designed to endure the demanding environments typical of industrial applications, offering long-term reliability.
  • Compact and Functional Design: Its compact size enables easy installation in areas where space is limited, while still maintaining full functionality and effectiveness.
  • Simple Adjustment Mechanism: Features an easy-to-use adjustment mechanism for quick and accurate pressure settings, facilitating straightforward system calibration.
  • Broad Compatibility: Seamlessly integrates with a wide range of pneumatic systems, enhancing flexibility and simplifying the setup process for various industrial configurations.


  • Enhanced System Efficiency: By stabilizing system pressure, it boosts the efficiency and dependability of pneumatic processes, significantly enhancing overall system performance.
  • Reduced Operational Costs: Optimizing pressure levels helps decrease energy consumption, potentially leading to considerable savings in operational expenses.
  • Extended Equipment Lifespan: Proper pressure management helps prevent premature wear and tear on pneumatic components, thus extending their operational life and reducing maintenance requirements.
  • Improved Safety: Consistent and reliable pressure regulation ensures safer operation of pneumatic systems, adhering to stringent safety standards.


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

The Festo MS4-LR-1/4-D7-AS Compressed Air Regulator stands as a testament to Festo’s commitment to advancing pneumatic technology, offering a sophisticated solution for managing air pressure and optimizing the performance of industrial processes. This product is a pivotal component in ensuring efficient, reliable, and safe pneumatic operations in a wide array of 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
0.8 bar … 14 bar
Pressure regulation range 0.5 bar … 12 bar
Max. pressure hysteresis 0.025 MPa
Max. pressure hysteresis 0.25 bar
Max. pressure hysteresis 3.625 psi
Standard nominal flow rate 1700 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