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In modern pneumatic systems, space and efficiency are paramount. Equipment designers are constantly challenged to integrate more functionality into smaller, more compact control panels. The WAALPC AFR Series Filter Regulator (models AFR1500 and AFR2000) addresses this challenge directly by combining two essential air preparation functions — high-efficiency filtration and precise pressure regulation — into a single, compact, and robust unit.
By integrating a filter and a regulator, the AFR Series eliminates the need for separate components, reducing piping complexity, minimizing potential leak points, and saving valuable installation space. It is the ideal solution for protecting sensitive pneumatic equipment in industries such as electronics, packaging, food processing, and general industrial automation.
This guide provides a detailed technical overview of the AFR Series, covering its working principle, key features, technical specifications, application scenarios, and installation guidelines.
An integrated filter regulator (often referred to as a "piggyback" regulator) is a two-in-one pneumatic component. It performs two critical functions sequentially:
Filtration: Removes solid particles, water droplets, and oil aerosols from the incoming compressed air.
Pressure Regulation: Reduces the upstream pressure to a stable, preset downstream pressure, regardless of fluctuations in the supply line or changes in air consumption.
The AFR1500 (with G1/8 ports) and AFR2000 (with G1/4 ports) are designed for medium-flow applications where a compact footprint and reliable performance are required.
The AFR Series operates through a continuous, two-stage process:
Compressed air enters the filter bowl tangentially, creating a high-speed vortex. This centrifugal force flings heavier water droplets and large particles against the inner wall of the bowl, where they collect at the bottom. The air then passes through a precision filter element (available in 5μm, 25μm, or 40μm grades), which traps finer contaminants like rust, pipe scale, and oil mist.
After filtration, the clean air flows into the regulating chamber. The regulator operates on the force-balance principle:
Turning the adjustment knob compresses a set spring, applying downward force on a diaphragm.
This force pushes open the valve poppet, allowing air to flow to the outlet.
The outlet pressure is fed back to the underside of the diaphragm via a sensing passage.
When the outlet pressure equals the set spring force, the valve reaches dynamic equilibrium, maintaining a constant output pressure. If the outlet pressure drops, the valve opens wider; if it rises, the valve closes slightly.
The AFR Series is engineered with features that enhance both performance and user experience:
Two-in-One Functionality: Combines filtration and regulation, saving up to 50% of the installation space compared to separate units.
Press-in Self-Locking Mechanism: The adjustment knob features a unique press-in locking design. Once the pressure is set, pushing the knob down locks it in place, preventing accidental adjustments due to vibration or external interference.
High-Efficiency Water Separation: The optimized bowl design ensures superior condensate removal, protecting downstream valves and cylinders from moisture damage.
Integrated Pressure Gauge Port: Each unit is equipped with a port for easy installation of a pressure gauge, allowing for real-time monitoring of the output pressure.
Transparent PE Bowl: The clear Polyethylene (PE) bowl allows for 360° visual inspection of the filter element and condensate level.
Flexible Filtration Options: Available with 5μm (precision), 25μm (standard), or 40μm (coarse) filter elements to match specific air quality requirements.
Low Pressure Loss: The internal flow path is optimized to minimize pressure drop, ensuring energy-efficient operation.
Parameter | AFR1500 | AFR2000 |
|---|---|---|
Working Medium | Air | Air |
Port Size | G1/8 | G1/4 |
Grade of Filtration | 5μm, 25μm, 40μm | 5μm, 25μm, 40μm |
Pressure Regulating Range (Standard) | 0.05 – 0.85 MPa | 0.05 – 0.85 MPa |
Pressure Regulating Range (Low Pressure Option) | 0.02 – 0.83 MPa | 0.02 – 0.83 MPa |
Max. Operating Pressure | 0.95 MPa | 0.95 MPa |
Pressure Resistance | 1.5 MPa | 1.5 MPa |
Operating Temperature | 5 – 60°C | 5 – 60°C |
Filter Cup Capacity | 15 CC | 15 CC |
Housing Material | Aluminum die-cast | Aluminum die-cast |
Container Cup Material | PE (Polyethylene) | PE (Polyethylene) |
Pressure Gauge Port | Yes (Standard) | Yes (Standard) |
The AFR Series is widely used across industries where clean, regulated air is critical:
Electronics Manufacturing: Providing clean, dry, and stable air for pick-and-place machines, soldering equipment, and cleanrooms.
Packaging Machinery: Ensuring consistent pressure for sealing jaws, grippers, and actuators.
Food & Beverage: Delivering filtered air for packaging and processing lines (with appropriate filtration grades).
General Industrial Automation: Serving as the primary air preparation unit for machine tools, assembly lines, and robotic cells.
Instrumentation: Supplying precise, stable air to analytical and laboratory equipment.
Check Flow Direction: Ensure the airflow follows the arrow on the body (IN to OUT). Reversing the flow will damage the internal mechanism.
Vertical Mounting: Install the unit vertically with the bowl pointing downwards to ensure proper condensate drainage.
Thread Preparation: Apply PTFE tape to male threads only, leaving the first thread bare to prevent debris from entering the valve. Tighten securely but do not overtighten.
Initial Setup: Before opening the air supply, turn the adjustment knob fully counterclockwise (zero pressure). Slowly open the supply, then turn the knob clockwise to set the desired pressure.
Daily: Check the pressure gauge for stability and inspect for air leaks. Drain condensate if the water level reaches the baffle.
Monthly: Verify the output pressure accuracy. Clean the exterior of the unit.
Every 3-6 Months: Replace the filter element. The element should be replaced when the pressure drop across the filter exceeds 0.05 MPa, or based on visual inspection of contamination.
✅ Space-Saving Design: Two functions in one compact body.
✅ Precise Control: Diaphragm mechanism with a self-locking knob for stable pressure.
✅ Durable Construction: Die-cast aluminum body with a high-strength PE bowl.
✅ Versatile Filtration: 5μm, 25μm, and 40μm options.
✅ Easy Monitoring: Standard pressure gauge port and transparent bowl.
✅ Wide Application Range: Suitable for G1/8 and G1/4 systems.
The WAALPC AFR Series Filter Regulator (AFR1500 & AFR2000) is a highly efficient, space-saving solution for pneumatic air preparation. By combining reliable filtration with precise pressure regulation, it ensures that downstream equipment receives clean, stable air, extending component life and reducing maintenance costs.
Key takeaways:
Models: AFR1500 (G1/8) and AFR2000 (G1/4).
Function: Integrated filtration (5/25/40μm) and pressure regulation (0.05–0.85 MPa).
Design: Aluminum body, transparent PE bowl, press-in self-locking knob.
Application: Ideal for compact machinery and general industrial automation.
For more information about the WAALPC AFR Series or to discuss your specific application requirements, please contact our technical sales team or visit www.waalpc.com.
