Hydrofit Products Manufacturer
Contact : +91-79045 61980
Email: hydrofitengineers@gmail.com
Air Filter Regulator Lubricator (FRL)
Air Preparation for Industrial Pneumatic Systems
Hydrofit Engineers supplies pneumatic FRL units for compressed-air preparation in industrial pneumatic systems. Based in Chennai, Hydrofit supports industrial requirements across India.
An FRL unit combines filtration, pressure regulation and, where required by the connected equipment, lubrication. Selection should match the actual airflow, pressure, filtration and downstream-equipment requirement.
How an FRL Unit Conditions Compressed Air
An FRL assembly prepares compressed air before it reaches downstream components. The three functions should be selected for the installation rather than assumed to be the same for every pneumatic circuit.
Filter
The filter stage addresses particulate and collected condensate according to the selected element, bowl and drain arrangement. Applications needing a particular level of air cleanliness should confirm the required filtration type with the selected model.
Regulator
The regulator is used to set and maintain the downstream line pressure within the range of the selected unit. The set pressure should be checked under the actual system operating condition.
Lubricator
A lubricator introduces a controlled oil mist where the connected equipment calls for lubrication. It is not a default requirement for every modern pneumatic component.
Technical Details to Confirm for an FRL Unit
| Parameter | What to confirm before selection |
|---|---|
| Port and thread connection | Confirm the line port size and thread type. |
| Flow requirement | Size for actual downstream airflow and an acceptable pressure drop. |
| Inlet and regulated pressure | Confirm supply pressure and the required downstream set pressure. |
| Filtration | Confirm the particulate, coalescing or special filtration requirement for the application. |
| Bowl and drain | Confirm the bowl arrangement, condensate handling and manual or automatic drain preference. |
| Gauge and mounting | Confirm the gauge requirement and bracket, panel or line mounting arrangement. |
| Lubricator | Use only where the downstream equipment recommends lubrication. |
| Environment and equipment | Confirm temperature, installation environment, air quality and connected equipment. |
Values vary by series, port size and configuration. Final values must be confirmed against the selected FRL model before ordering.
Selecting the Correct FRL Size
Thread size alone does not determine a suitable air-preparation unit. Review the required airflow, inlet pressure, required regulated pressure, filtration need, drain preference, lubrication need, installation environment and the components connected downstream. This avoids selecting a unit solely because its port matches the pipework.
Filter Maintenance and Pressure Setting
Inspect the filter bowl condition, condensate collection and visible element condition as part of normal equipment checks. Review the regulated pressure at the gauge or relevant system point, and check lubricator oil level where a lubricator is fitted. Maintenance timing should follow the selected model and the actual installation condition rather than a generic fixed interval.
When an FRL Unit Is Required
An FRL may be installed upstream where air cleanliness, controlled downstream pressure or equipment-specific lubrication is required. The air preparation arrangement should suit the pneumatic circuit and the requirements of the connected components.
Related Pneumatic Equipment
The selected air-preparation arrangement should be considered with the downstream pneumatic valves, pneumatic cylinders, the one-touch fitting range and relevant pneumatic air tools.
Information Required for an Enquiry
- Port size and thread type
- Required airflow
- Inlet pressure and required outlet pressure
- Filtration requirement
- Drain preference
- Lubricator requirement
- Quantity and application
Frequently Asked Questions
What does an FRL unit do?
It combines filtration, pressure regulation and, where required, lubrication for a compressed-air line.
Does every pneumatic system need a lubricator?
No. Confirm whether the connected equipment requires lubrication before including that stage.
Why is port size not enough for FRL selection?
Airflow, inlet pressure, regulated pressure, filtration and installation requirements also affect selection.
What information helps identify the right unit?
Provide the port/thread, airflow, pressure, filtration, drain, lubrication and application details.
Can Hydrofit support FRL enquiries outside Chennai?
Hydrofit is based in Chennai and supports industrial FRL requirements across India.