Airtac GAFR Adjustable Filter Regulator GAFR50020SNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SNK 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 40 µm filter element and regulates 0.15 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020SNK
The GAFR50020SNK is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. This 3/4in model handles a standard 0.15-0.9 MPa (20-130 psi) range and comes with a 40 um element, plus a semi-auto and manual drain. The 108 cc condensate bowl collects water and solids separated by the internal diversion structure, and the 950 g weight signals a unit that needs proper panel mounting rather than tubing support.
A balanced, self-locking regulator keeps the set pressure steady as supply varies, resisting drift from vibration. This version ships without a gauge, but the 1/4in gauge connection is ready for one if you need to read outlet pressure directly. A reverse-flow valve is fitted as an ordering difference, and the PT thread matches standard local fittings.
Airtac GAFR Adjustable Filter Regulator GAFR50020SNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SNK |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 GAFR50020SNK
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| N | No pressure gauge; 1/4" gauge connection. |
| (blank) | Filtering grade 40 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 GAFR50020SNK Is Used
Machine tool header
Feed a 3/4in header supplying several pneumatic actuators on a CNC machine, where steady pressure keeps clamping force consistent.
Assembly line air prep
Position before a multi-station assembly conveyor to filter moisture and set a stable pressure for downstream valves and cylinders.
Test bench supply
Use on a test bench with a 40 um element to protect sensitive instrumentation, while the manual drain allows quick condensate checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SNK the Right Air-Prep Unit?
Choose this GAFR500 body when you need a 3/4in port and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet, which suits medium-sized machine headers. The PC bowl is the standard choice, while the included mounting bracket simplifies installation; the semi-auto plus manual drain covers both attended and occasional draining. The 40 um element handles general shop air, and the standard S type covers most applications up to 0.9 MPa. If you need oil downstream, order the matching GAFC500-20 combination instead, since this unit does not lubricate. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan your inlet pressure accordingly.
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 GAFR50020SNK FAQ
The GAFR50020SNK works with air, has a 3/4in port, and a standard pressure range of 0.15-0.9 MPa (20-130 psi). Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C. It has a 108 cc drain bowl, weighs 950 g, and includes a 40 um element.
The K indicates a reverse-flow (reflux) valve is fitted to this model. It is an ordering difference from a standard unit; the specific function is detailed in the catalogue. This unit also has no gauge, so you would need to add one to the 1/4in connection to read outlet pressure.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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