WENK Pneumatic AC/BC Series FRL Unit (Filter-Regulator-Lubricator with Filtration)
Product Detail
Filtration Rating |
40μm |
Working Pressure |
0.05~0.9Mpa |
Proof Pressure |
1.5Mpa |
Working Temperature Range |
-5℃~60℃ |
Cup Material |
Polycarbonate (PC Material) |
Body Material |
Aluminum Alloy |
AFC/BFC Air Filter Regulator User Manual

Product Overview
The AFC2000 Air Filter Regulator is an Airtac-type pneumatic component that integrates air filtration and pressure regulation functions. By removing impurities from compressed air and stabilizing the pressure at a set value, it provides clean, dry, and pressure-stabilized compressed air for downstream pneumatic equipment, effectively extending equipment service life and improving system reliability.
Technical Specifications:
- Working Medium: Air
- Filtration Precision: 5μm
- Pressure Regulation Range: 0.05-0.85MPa
- Maximum Working Pressure: 1.0MPa
- Proof Pressure: 1.5MPa
- Working Temperature: 5-60°C
- Port Size: PT1/4"
- Filter Bowl Capacity: 60cc
- Body Material: Aluminum alloy die-casting
- Bowl Material: Polycarbonate
- Weight: 0.25kg

Installation Steps
1. Pre-installation Preparation
- Ensure the compressed air system is shut off and depressurized
- Clean the connecting pipes to remove foreign objects and impurities
- Prepare necessary tools: wrench, PTFE tape, etc.
- Check that the filter regulator is in good condition with no damage
2. Installation Location and Direction
- Installation Location: Should be installed at the front end of the air treatment system, near the air source outlet
- Installation Direction: Strictly follow the arrow direction on the body; the inlet connects to the upstream air source, and the outlet connects to downstream equipment
- Prohibited Installation: Avoid locations with excessive vibration, high temperature, or corrosive gases
3. Piping Connection
- Use PTFE tape to seal threaded connections for a good seal
- Inlet port (P) connects to the upstream air source
- Outlet port (A) connects to downstream pneumatic components
- Tighten connections evenly with a wrench, avoiding excessive force that may damage the connections
- When wrapping PTFE tape, start from the beginning of the thread and leave 1-2 threads unwrapped to prevent tape from entering the air passage
- It is recommended to install shut-off valves before and after the filter regulator for easy maintenance
4. Secure Installation
- Use dedicated mounting brackets to firmly fix the filter regulator
- Ensure the installation position allows easy observation of the pressure gauge and pressure adjustment
- Leave sufficient space for operation and maintenance

Operation Guide
1. Pressure Adjustment Method
-
Pressure Adjustment Operation:
- Pull up the pressure adjustment knob
- Rotate the knob clockwise to increase pressure
- Rotate the knob counterclockwise to decrease pressure
- After adjusting to the desired pressure, press down the knob to lock
-
Pressure Setting Recommendations:
- General pneumatic systems: 0.5-0.6MPa
- Precision pneumatic components: 0.3-0.4MPa
- Pneumatic tools: 0.6-0.7MPa
2. Drainage Operation
-
Manual Drainage:
- When the water level reaches 1/2 of the bowl, press the red drain button
- The button automatically resets after drainage is complete
- Daily drainage is recommended, or increase frequency based on usage
3. Pressure Monitoring
- Monitor the output pressure in real-time through the integrated pressure gauge
- Regularly check if the pressure is stable at the set value
- If significant pressure fluctuations are found, check for leaks or other abnormalities in the system

Maintenance
1. Daily Inspection
- Regularly check for leaks at all connections of the filter regulator
- Check if the pressure gauge reading is stable
- Observe the water level in the filter bowl and drain in a timely manner
- Check for cracks or damage on the bowl
2. Regular Maintenance
-
Cleaning the Filter Element:
- Shut off the air supply and relieve pressure
- Remove the filter bowl and take out the filter element
- Clean the filter element with compressed air from the inside out
- If the filter element is damaged or cleaning effectiveness is poor, replace it promptly
-
Replacing the Filter Element:
- Remove the old filter element following the steps for cleaning
- Install the new filter element, ensuring proper installation
- Reinstall the filter bowl, ensuring a good seal
3. Maintenance Schedule
- Daily inspection: Once per day
- Drainage operation: Once per day
- Filter element cleaning: Once every 2 months
- Filter element replacement: Once every 6 months or as needed

Precautions
1. Safety Precautions
- Always shut off the air supply and relieve pressure before installation and maintenance
- Do not exceed the maximum working pressure of 1.0MPa
- Avoid use in high-temperature environments (temperature not exceeding 60°C)
- Do not strike the filter regulator with sharp objects
2. Usage Limitations
- Only suitable for compressed air systems
- Not for use in corrosive gas environments
- Avoid direct sunlight and strong vibration
- Avoid use in environments with excessive dust or moisture
3. Troubleshooting
-
Pressure cannot be adjusted:
- Check if the pressure adjustment knob is pulled up
- Check if the pressure adjustment spring is damaged
- Check if the diaphragm is aged or damaged
-
Unstable pressure:
- Check if the system has leaks
- Check if the inlet pressure is stable
- Check if the diaphragm is damaged
-
No output pressure:
- Check if the air source is normal
- Check if the inlet is blocked
- Check if there is foreign object blockage inside the pressure regulator

Frequently Asked Questions
Q1: Why must the filter regulator be installed according to the arrow direction?
A1: The internal structure of the filter regulator is designed for one-way flow. Reverse installation will make it unable to work normally and may even damage internal components.
Q2: How to determine if the filter element needs to be replaced?
A2: The filter element should be replaced when:
1) The outlet flow decreases significantly;
2) The filter element color darkens significantly;
3) The filtering effect decreases significantly;
4) Usage time exceeds 6 months.
Q3: Why does the set pressure of the filter regulator change automatically?
A3: Possible reasons include:
1) The pressure adjustment knob is not fully pressed down and locked;
2) The diaphragm is aged or damaged;
3) Excessive fluctuations in inlet pressure;
4) System leaks.
Q4: Can the filter regulator be directly connected to the air compressor output?
A4: Direct connection is not recommended. An air dryer should be installed between the air compressor and the filter regulator to remove moisture and impurities from the compressed air, extending the service life of the filter regulator.
Q5: Why does the filter regulator produce abnormal noise during use?
A5: Possible reasons include:
1) Excessively high inlet pressure;
2) Excessively high air flow velocity;
3) Worn or loose internal components;
4) Clogged filter element.












