MS4-LR-1/8-D7-AS – Pressure Regulator – Festo Compressed Air Regulator

USD $ 53.97

SKU: Festo 529425

Manufacturer Part Number: Festo 529425
Festo Compressed Air Regulator: MS4-LR-1/8-D7-AS
OEM Spec Ref 

The Festo MS4-LR-1/8-D7-AS Compressed Air Regulator, with MPN 529425, is a high-quality pneumatic regulator engineered for precise control and efficient operation in various industrial environments. This regulator is designed to deliver optimal performance by ensuring consistent pressure management in pneumatic systems, thereby enhancing their efficiency and reliability.

Key Features:

  • Precise Pressure Regulation: Tailored to provide exact control over system pressure, this regulator ensures desired operational conditions for peak performance, crucial in demanding industrial applications.
  • Robust Construction: Built from high-quality materials, the MS4-LR-1/8-D7-AS is designed to endure the harsh conditions of industrial environments, offering durability and long-term reliability.
  • Compact and Versatile Design: Its compact size facilitates easy installation in areas where space is limited, without compromising its functionality or effectiveness.
  • Easy Adjustment: Features a user-friendly adjustment mechanism for quick and precise pressure settings, enabling optimal system calibration and ease of use.
  • Universal Compatibility: This regulator can be seamlessly integrated into a wide variety of pneumatic systems, providing extensive flexibility in system design and enhancement.


  • Enhanced System Efficiency: By maintaining consistent pressure, the regulator significantly contributes to the efficiency and reliability of pneumatic processes, improving overall system performance.
  • Reduced Operational Costs: Optimizing pressure levels helps minimize energy consumption, which can lead to substantial cost savings and more efficient resource use.
  • Increased Equipment Lifespan: Proper pressure regulation prevents excessive wear and tear on pneumatic components, extending their lifespan and reducing the need for frequent maintenance.
  • Improved Safety: Reliable and consistent pressure control ensures safer operation of pneumatic systems, adhering to strict safety standards and reducing the risk of operational hazards.


  • 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 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, crucial for maintaining high quality and compliance.
  • General Pneumatics: Suitable for a wide range of pneumatic applications across various industries, enhancing operational precision and reliability.

The Festo MS4-LR-1/8-D7-AS Compressed Air Regulator stands as a testament to Festo’s commitment to advancing pneumatic technology, offering a sophisticated solution for managing system pressure and optimizing the performance of industrial processes. This regulator is a vital component in ensuring efficient, safe, and reliable 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 0.5 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 1000 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 G1/8
Pneumatic connection 2 G1/8
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