Integrated FRL assemblies for compressed air filtration, pressure regulation and pneumatic equipment lubrication.
Compressed air quality and pressure stability can directly affect pneumatic equipment performance. HENGKO stainless steel air preparation units combine filtration, pressure regulation and lubrication functions in a compact assembly for industrial compressed air systems.
Available in H-200, H-400 and H-600 series, these units offer 316L stainless steel construction, multiple connection sizes and configuration options for demanding installations.
Untreated compressed air may contain particles, liquid condensate and pressure fluctuations. An appropriately selected FRL unit helps prepare the air supply before it reaches pneumatic valves, cylinders and other equipment.
The filter section removes particles according to the selected filtration grade and helps separate and collect certain liquid contaminants from the compressed air stream.
The regulator adjusts outlet pressure to suit the pneumatic system. Actual regulation performance depends on inlet conditions, flow demand and the selected configuration.
The lubricator introduces oil into the air supply for compatible downstream pneumatic equipment. It should not be used where the process requires oil-free compressed air.
In a typical FRL arrangement, compressed air enters the filter, passes through the regulator and then reaches the lubricator before entering compatible downstream equipment.
The actual assembly arrangement and flow direction must follow the product drawing and installation instructions. A lubricator is not appropriate for every compressed air application.
The specified stainless steel body, bowl and filter materials provide a corrosion-resistant construction option for demanding environments. Chemical compatibility must be checked for the complete assembly, including seals.
Combining filter, regulator and lubricator functions can simplify the layout of compressed air preparation equipment and reduce the need to source separate components.
The product range includes nominal port sizes from 1/4 inch to 1 inch, allowing selection for different compressed air distribution arrangements.
Manual, semi-automatic and specified automatic drain arrangements can be evaluated according to system pressure, maintenance requirements and installation conditions.
The original specification identifies 5 μm standard filtration and 40 μm as an optional grade, enabling selection according to the downstream equipment requirements.
Start with the connection size and required compressed air flow. Then confirm the pressure range, filtration grade, temperature conditions and drain arrangement.
| Model | Port Size | Series |
|---|---|---|
| H-200-SFRL-02 | 1/4" | H-200 |
| H-400-SFRL-03 | 3/8" | H-400 |
| H-400-SFRL-04 | 1/2" | H-400 |
| H-600-SFRL-06 | 3/4" | H-600 |
| H-600-SFRL-10 | 1" | H-600 |
| Specification | H-400-SFRL-03 | H-400-SFRL-04 |
|---|---|---|
| Port | 3/8" | 1/2" |
| Max Flow | 2,200 L/min | 2,500 L/min |
| Weight | 3,840 g | 3,830 g |
| Lubricator Bowl | 110 cc | Not specified |
| Filter Bowl | 130 cc | Not specified |
Flow ratings are reproduced from the supplied product information. Reference pressure and test conditions were not provided; confirm the flow curve before final selection.
| Series | H-200-SFRL / H-400-SFRL / H-600-SFRL |
|---|---|
| Working Fluid | Compressed Air |
| Body / Bowl | 316L Stainless Steel |
| Filter Element | 316L Stainless Steel |
| Pressure Gauge Casing | 316L Stainless Steel |
| Filtration Grade | 5 μm Standard / 40 μm Optional |
| Regular Working Pressure | 0.5–16 kgf/cm² |
| High-Pressure Version | 5–30 kgf/cm² |
| Maximum Inlet Pressure | Up to 40 kgf/cm², configuration-dependent |
| Standard Ambient Temperature | −5 to +100°C |
| Low-Temperature Option | −40 to +55°C |
| Ultra-Low Option | −60 to +100°C, subject to configuration verification |
| Standard Drain | Semi-automatic; specified to drain below 0.5 kgf/cm² |
| Included Accessories | Pressure gauge, plugs and mounting bracket set |
| Gauge Options | 0–16 kgf/cm² / 0–60 kgf/cm² |
The stainless steel FRL series includes different drainage and lubricator arrangements. Selection should consider the available maintenance access and operating pressure.
Specified drain configurations include an internal G1/8 thread and manual drainage arrangements.
A barbed fitting option allows connection to compatible plastic tubing for drainage or associated functions.
The original product information identifies visible oil-window arrangements for certain low-pressure versions and non-visible arrangements for certain high-pressure versions.
Automatic drain configurations are listed with 16 and 40 kgf/cm² pressure ratings. The source also states that these versions cannot drain above 8 kgf/cm²; confirm the exact drainage operating conditions.
Allow suitable access for bowl inspection, drainage, filter maintenance and lubricator oil replenishment according to the installed configuration.
Stainless steel FRL units can be considered for compressed air systems in environments where corrosion resistance, pressure regulation and equipment maintenance are important.
Pneumatic actuators and packaging machinery operating in humid or frequently cleaned areas. Lubricator compatibility and any food-contact or air-quality requirements must be assessed separately.
Non-product-contact pneumatic utility circuits where stainless steel construction is preferred. This FRL alone does not provide sterile or validated pharmaceutical-grade compressed air.
Pneumatic control systems in demanding industrial surroundings, subject to full material and seal compatibility checks.
Compressed air preparation for pneumatic valves and actuators in water treatment and utility equipment installations.
Pneumatic equipment in humid and salt-exposed environments where the suitability of stainless steel assemblies can be evaluated.
Compressed air treatment for pneumatic tools, cylinders, valves and manufacturing machinery requiring the selected filtration and lubrication arrangement.
HENGKO can review configuration requirements for industrial compressed air preparation projects. Provide the operating conditions and desired assembly details to help identify a suitable model.
For an OEM quotation, include your inlet pressure, required outlet pressure, air flow, port size, ambient conditions and estimated purchase quantity.
FRL stands for Filter, Regulator and Lubricator. These components provide air filtration, pressure adjustment and lubrication for compatible pneumatic equipment.
The supplied specification lists 5 μm as standard and 40 μm as an optional filtration grade. Confirm the filtration rating and test basis for your application.
The product information lists a maximum inlet pressure of 40 kgf/cm², while normal and high-pressure operating ranges are lower. The allowable pressure must be confirmed for the complete selected assembly.
No. A filter section can help separate certain liquid contaminants, but it does not replace a compressed air dryer for controlling water vapor and pressure dew point.
No. Some pneumatic equipment requires oil-free air or is designed for operation without added lubrication. Always check the downstream equipment manufacturer's requirements.
Provide the required air flow, inlet and outlet pressure, connection size, operating temperature, filtration grade and drainage preference.
Whether you need a standard H-400 assembly or a configuration for a demanding pneumatic installation, HENGKO can review your operating conditions and purchasing requirements.
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