Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK 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 materialPC
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK
The GAFR50020LNWK is a filter and pressure regulator combined in a single body, so it cleans incoming air and sets a steady outlet pressure without needing a separate filter plus regulator. This 3/4in unit operates in the lower 0.15-0.4 MPa (20-58 psi) band and uses a 5 um element to trap fine particles for sensitive downstream equipment.
Its 108 cc condensate bowl collects separated water and solids, and the semi-auto plus manual drain gives you both automatic purging and a manual override. Weighing 950 g, this size class demands a proper panel or frame mount rather than support from the tubing alone. The reverse-flow (reflux) valve is fitted as an ordering difference, and no gauge is supplied, so the 1/4in gauge connection remains available if you add one later.
Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK |
|---|---|
| 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 | PC |
| 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. No gauge is supplied with this model — the gauge connection on a GAFR500 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| 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 GAFR50020LNWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require stable, low-pressure air at 0.15-0.4 MPa. The 5 um element protects fine internal passages, while the balanced regulator holds the setpoint as shop pressure fluctuates.
Machine header supply
Mount this 3/4in unit on a machine header feeding multiple actuators. The 108 cc bowl handles condensate from a wet line, and the semi-auto drain purges automatically while retaining a manual backup for maintenance checks.
Instrument air bench
Use it on a test bench where instruments need clean, regulated air below 0.4 MPa. The 5 um element and the self-locking knob keep the set pressure stable even when the bench vibrates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020LNWK the Right Air-Prep Unit?
Choose the GAFR500 body when you need 3/4in ports and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet; if you need less capacity, the GAFR400 offers 1/2in ports with a 7000 L/min envelope at the same inlet condition. The PC bowl suits general shop air, while the 5 um element provides finer filtration than the standard 40 um grade at the cost of more frequent element service. This model ships with the mounting bracket included, a semi-auto plus manual drain, and the lower-pressure regulator capped at 0.4 MPa, so confirm your machine never needs more than that. The PT thread carries an MPa/psi gauge scale, and the reflux valve is present as a specified option. If your line needs oil downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the 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 GAFR50020LNWK FAQ
It is a filter & regulator with a 3/4in port, working pressure 0.15-0.4 MPa (20-58 psi), maximum pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 5 um filtering grade, 108 cc drain bowl, and 950 g weight. The gauge connection is 1/4in, and the unit has a semi-auto plus manual drain.
The L code sets the regulator to 0.15-0.4 MPa, which suits applications that must not exceed 0.4 MPa. The N code after the port means no gauge is supplied, so you cannot read the outlet pressure unless you add one to the 1/4in gauge connection. The reflux valve (K) is fitted as an ordering difference.
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 GAFR50020LNWK
Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.