Combined filtration and pressure regulation for clean, stable compressed air
SMC filter regulators combine air filtration and pressure control in a single, compact unit, ensuring clean, moisture-reduced compressed air delivered at a stable, precise downstream pressure.
By integrating a high-efficiency air filter with a relieving or non-relieving pressure regulator, these devices protect pneumatic valves, actuators and instrumentation from contaminants while improving repeatability, energy efficiency and overall system reliability.
What is a filter regulator?
A filter regulator is a two-stage air-preparation component that removes solid particles and water droplets from compressed air while regulating outlet pressure to a defined, stable setpoint.
The filtration stage captures contaminants before they enter sensitive equipment, while the regulating stage maintains consistent pressure even when inlet pressure or flow demand fluctuates.
This combination reduces wear, prevents stick-slip in actuators and helps maintain consistent machine performance in demanding industrial environments.
Why air filter regulators are essential in compressed air systems
In industrial environments,
air quality and pressure stability are critical.
A filter regulator prevents dust, moisture and oil particles from entering actuators and valves while delivering consistent pressure for repeatable performance.
This combination reduces wear, prevents malfunctions and
optimises energy efficiency by avoiding unnecessary pressure losses.
Key features of SMC’s filter regulators
- Integrated filtration and pressure regulation: Combines two essential air-preparation functions in a single unit, reducing installation space and minimising potential leak points
- High-efficiency contaminant removal: Removes solid particles and water droplets with a nominal filtration rating of 5 µm, with finer options available in 0.3 µm and 0.01 µm for cleaner downstream air
- Stable and precise pressure control: Provides consistent outlet pressure even when inlet conditions or flow demand fluctuate, ensuring repeatable performance in actuators and valves
- Modular, compact design: Fully compatible with SMC’s AC/AC-D modular FRL system, enabling quick connection to filters, lubricators, mist separators and pressure switches without tools
- Enhanced durability and safety: Features robust construction, optional transparent bowl guard with 2-layer protection and materials suitable for harsh or chemically-exposed environments, including stainless steel variants for demanding applications.
Types of SMC filter regulators
Filter regulator with backflow function
The
AW-D series of filter regulators with backflow function provides 5 µm filtration for general pneumatic applications, combining the functionality of a standard filter and regulator while also featuring options for food industry and battery manufacturing applications.
Micro mist separator regulators and mist separator regulators
SMC’s mist separator regulators and micro mist separator regulators are designed to supply compressed air with reduced oil content while providing stable pressure regulation.
All models are compatible with SMC’s modular AC/AC-D systems and, for body sizes 30 and above, feature a transparent 2-layer bowl guard that improves durability and allows easy visual inspection of condensate.
The
AWM/D-D series retains the same filtration performance as their standard counterparts while delivering
0.3 or 0.01 µm filtration for effective removal of fine particles and aerosols, making them suitable for demanding applications as well as general pressure regulation.
The range retains the same filtration performance as its standard counterparts and includes:
These units enable effective removal of fine particles and aerosols, making them suitable for demanding applications and general pressure regulation.
Optional auto-drain and mounting accessories allow flexible configuration within FRL systems while the available filtration grades help engineers select the right unit based on the air cleanliness required.
Filter regulators with built-in pressure gauge
The
AWG-D series of filter regulators incorporates all the features from AW-D plus a built-in pressure gauge that facilitates panel mounting and easy visualisation of the pressure setting.
316 stainless steel filter regulators
The
AW30/40-X2622 stainless steel filter regulators are designed for applications requiring increased resistance to corrosion and environmental exposure. They use 316 stainless steel external components, operate over a wide temperature range, including low temperatures, and meet NACE requirements, providing reliable filtration and pressure regulation in demanding industrial environments.
Key technical characteristics of filter regulators
Filtration performance
SMC filter regulators use proven filtration technologies:
- 5 µm: Standard filter regulators
- 0.3 µm: Mist separator regulators
- 0.01 µm: Micro mist separator regulators.
This range allows precise tailoring to application requirements, from general automation to oil-sensitive production lines.
Stable, accurate pressure control
SMC filter regulators are designed for stable downstream pressure under varying inlet conditions.
Typical
set pressure range:
0.05–0.85 MPa (model dependent).
Low-pressure (0.02–0.2 MPa) and medium-pressure variants are available for specialist applications requiring precise control at lower setpoints.
Relieving and non-relieving options ensure versatility for both dynamic and closed-system requirements.
Enhanced durability and safety
Several safety and maintenance improvements are included across SMC’s latest AC-D designs:
- Transparent bowl guard with 2-layer construction, protecting the inner bowl from chemical splash and impact
- 360° visibility for quick condensate inspection
- Lightweight housings that simplify installation and reduce load on manifolds
- Auto-drain options (float type N.O. / N.C.) for reliable condensate removal.
These features support safer operation and longer service life in harsh industrial environments.
Benefits of SMC filter regulators
- Extended equipment service life: High-efficiency filtration prevents particle intrusion and moisture carryover, reducing wear on valves, cylinders and precision components, and lowering unplanned maintenance
- Reduced energy consumption: Stable, optimised pressure regulation avoids over-pressurising actuators, helping minimise air consumption and improve overall pneumatic system efficiency
- Space and cost efficiency: By combining filtration and regulation into one compact body, SMC filter regulators simplify system layouts, reduce connection points and hardware, and streamline both installation and inventory
- Seamless modular integration: Fully compatible with SMC’s AC / AC-D modular FRL platform, allowing fast, tool-less connection to filters, lubricators, mist separators, pressure switches and additional accessories for customised air-preparation assemblies.
Modular design for fast installation
SMC filter regulators integrate seamlessly into the
AC / AC-D modular FRL system. Components such as air filters, lubricators, mist separators and pressure switches can be connected without tools using spacers and adapters.
Key modular advantages include:
- Built-in pressure gauge orientation (0°, 90°, 180°, 270°) for optimal visibility
- Front or side-mounting options
- Multi-directional piping using L, T and right-angle adapters
- Quick replacement of bowls and filter elements
- Reduced installation height with AWG/ARG built-in gauge designs.
This modularity reduces assembly time, minimises machine downtime and allows easy customisation of air-preparation units.
Choosing the right air filter regulator
When selecting a filter regulator, consider:
- Required filtration grade (5 µm, 0.3 µm, 0.01 µm)
- Downstream sensitivity (standard actuators vs. instrumentation)
- Operating pressure range and regulator type (relieving/non-relieving)
- Flow requirements and port size
- Environmental constraints (chemical exposure, temperature, corrosion)
- Modular integration with existing FRL components.
Use SMC’s Airline Configurator to design a complete air-preparation system tailored to your needs. For detailed sizing, try our Air Combination Model Selection Software or contact our experts for personalised advice.
If you prefer direct assistance, don’t hesitate to contact our experts for personalised advice.
