Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK is a genuine two-in-one filter & regulator — a diversion-type water/particulate filter and a balanced pressure regulator built into ONE body. It has 3/4" ports, a 5 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialMetal
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK
The GAFR500C20LWK is a filter & regulator in one body, combining a diversion-type filter with a balanced pressure regulator. It handles 3/4in ports and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), with a 5 um element for finer filtration. The metal bowl holds 108 cc of condensate, and the unit weighs 950 g.
This single-piece design replaces a separate filter and regulator, reducing potential leak points and saving rail space. The pressed-in self-locking knob resists vibration-induced drift, helping maintain the set pressure. The diversion structure spins the air to separate liquid water and solid particles into the bowl.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| Drain type | Semi-auto drain + manual drain |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 108 cc |
| Bracket | Included |
| Weight | 950 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| (blank) | Drain: Semi-auto drain + manual drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
The filter and the regulator are ONE body here — there is no separate GAF filter or GAR regulator part to assemble. Need lubrication downstream too? Add a lubricator by ordering the matching GAFC500-20 F.R.L. combination instead.
Size Class & Flow Envelope
- GAFR2001/8"-1/4" · 2000 L/min
- GAFR3001/4"-1/2" · 3500 L/min
- GAFR4003/8"-1/2" · 7000 L/min
- GAFR5003/4" · 8000 L/min
- GAFR6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue at 0.7 MPa inlet pressure — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. Outlet pressure falls as flow rises, so size a body with headroom above your peak demand.
| This model | GAFR500 · 3/4" · curve to 8000 L/min |
|---|---|
| One size down | GAFR400 |
| One size up | GAFR600 (curve to 12000 L/min) |
| Add a lubricator | GAFC500-20 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK Is Used
Machine header supply
Feed a 3/4in machine header serving multiple pneumatic actuators, where a lower regulated pressure is acceptable and finer filtration protects downstream valves.
Instrument air branch
Supply a branch line for precision instruments or sensitive controls that require 5 um filtration and a stable, lower pressure setting.
Multi-station assembly line
Provide filtered, regulated air to a multi-station assembly line where the 108 cc metal bowl handles condensate between scheduled maintenance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK the Right Air-Prep Unit?
Choose the GAFR500 body for 3/4in ports and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet. The metal bowl (C) is a build choice; the common pressure and temperature specs are identical across bowl materials. This model includes the semi-auto and manual drains, the mounting bracket, and a circular gauge with MPa/psi scale. The 5 um element (W) traps finer particles than the standard 40 um, but requires more frequent service. The reverse-flow (reflux) valve (K) is fitted as an ordering difference. If you need lubrication downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, there is about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated range.
Quick checklist
- ✓ Body size for your peak flow (3/4" here)
- ✓ Standard 0.9 MPa or lower-pressure 0.4 MPa
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Element 40 µm or 5 µm
- ✓ Bracket kept or removed (J); add a lubricator = GAFC
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, gauge/knob accessible.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure with the pressed-in self-locking knob; pull to adjust, press to lock.
- check Drain condensate before the 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 950 g unit on its bracket, not on the tubing.
This is a filter and regulator only — it delivers filtered, pressure-set air with no added oil. If a downstream tool needs lubrication, add a separate lubricator or order the GAFC500-20 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK FAQ
The GAFR500C20LWK is a filter & regulator with a 3/4in port. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Operating temperature is -5 to 70 C. The metal drain bowl holds 108 cc, and the unit weighs 950 g.
The K code indicates the reverse-flow (reflux) valve is fitted. It is an ordering difference; the catalogue does not detail its function in the data we have. This model also has a 5 um element and a lower-pressure regulator type.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Air-Preparation Units
Request a Quote for Airtac GAFR Adjustable Filter Regulator GAFR500C20LWK
Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.