Airtac GAR Air Regulator GAR50020LJNK
The AirTAC Airtac GAR Air Regulator GAR50020LJNK is a genuine compressed-air pressure regulator. It sets and holds a steady downstream pressure across the 0.05 - 0.4 MPa range, with 3/4" ports and a no-gauge (N) port for a panel gauge. It regulates pressure only — it does not filter the air or remove water.
- TypeAir regulator
- Port size3/4"
- Pressure range0.05 - 0.4 MPa
- RegulationLower pressure
- GaugeNone (N)
- Reflux valveYes (K)
- Max pressure1.0 MPa
- Weight580 g
About the Airtac GAR Air Regulator GAR50020LJNK
The GAR50020LJNK is an air pressure regulator that takes a higher supply pressure and holds a steady, lower downstream pressure you set with the knob. It does not filter or clean the air, has no drain bowl, and no filter element. This unit carries a 3/4in port and weighs 580 g, placing it in the mid-large size class for heavier industrial lines.
This lower-pressure (L) type regulates from 0.05 to 0.4 MPa (7-58 psi), giving finer resolution over that low band. The pressed-in self-locking knob stops the set pressure drifting from vibration, so a machine keeps its setting through a shift. A reverse-flow (reflux) valve is attached to this model.
Airtac GAR Air Regulator GAR50020LJNK Technical Specifications
| Model | Airtac GAR Air Regulator GAR50020LJNK |
|---|---|
| Series | GAR500 air regulator |
| Port size | 3/4" (PT thread) |
| Regulation type | Lower pressure |
| Pressure range | 0.05 - 0.4 MPa (7 - 58 psi) |
| Pressure gauge | None (N) — MPa / psi port |
| Bracket | Not included (J) |
| Reflux valve | Attached (K) |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -20 to +70 °C |
| Adjustment | Self-locking press-in knob |
| Mounting | Panel + optional bracket |
| Weight | 580 g |
Specifications follow the official AirTAC GAR catalogue (pages 228-229). This is a regulator only — it sets and holds a downstream pressure but does not filter the air or separate water. To clean the air as well, use the matching GAFR500 filter-regulator or add a GAF filter upstream. Never run above the 1.5 MPa (215 psi) proof pressure.
Model Code: Airtac GAR Air Regulator GAR50020LJNK
| GAR500 | GA500 series air regulator — sets the port range and weight class. |
|---|---|
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| L | Lower pressure regulation: 0.05 - 0.4 MPa (7 - 58 psi). This body offers S (standard) or L (lower pressure). |
| J | No bracket (J) — panel mount or existing bracket. |
| N | No gauge (N) — for a line with a panel gauge already. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached (K). |
A GAR regulates pressure but does not filter — there is no bowl, element or drain code. Need to clean the air too? The matching GAFR500-20 is the same regulator with a built-in filter.
Size Class
- GAR2001/8"-1/4" · 170 g
- GAR3001/4"-1/2" · 300 g
- GAR4003/8"-1/2" · 570 g
- GAR5003/4" · 580 g
- GAR6003/4"-1" · 1390 g
All bodies share the same 0.05-0.9 MPa (S) regulated range, 1.0 MPa max and 1.5 MPa proof; the body number sets the port size and the flow the regulator can pass. Bigger ports feed higher air demand. The catalogue plots a flow curve at 0.7 MPa inlet but prints no numeric envelope, so size by port and weight and confirm the curve for a real duty point.
| This model | GAR500 · 3/4" · 580 g |
|---|---|
| One size down | GAR400 |
| One size up | GAR600 |
| Add filtration | GAFR500-20 (filter + regulator) |
Where the Airtac GAR Air Regulator GAR50020LJNK Is Used
Low-pressure clamp circuits
Set a gentle, repeatable 0.2 MPa for a delicate part clamp on an assembly fixture. The L type's finer low-band resolution keeps the force consistent without over-squeezing.
Spray or mist supply header
Feed a 3/4in header that supplies multiple spray guns at a fixed low pressure. The balanced design holds the setpoint as the main supply fluctuates during peak demand.
Test rig with a regulated low band
Use it on a test bench that needs a stable 0.3 MPa for checking valve actuation. The self-locking knob prevents the setpoint from creeping between test runs.
Is the Airtac GAR Air Regulator GAR50020LJNK the Right Regulator?
Choose the GAR50020LJNK when your line needs a 3/4in port and a low regulated pressure below 0.4 MPa. The L type cannot reach a 0.5-0.6 MPa setpoint at all, so for standard machine pressures pick the S type instead. This unit has no gauge (N), so read pressure on the line's own panel gauge, and no bracket (J), so mount it directly to a panel or existing bracket. The PT thread reads MPa/psi on any fitted gauge. The K code names a reverse-flow (reflux) valve attached to the outlet. If the air also needs cleaning, use a GAFR500-20 or a GAF filter upstream. The standard S type spans about 2.4x this L type's adjustable band (0.85 MPa vs 0.35 MPa).
Quick checklist
- ✓ Body size for your air demand (3/4" here)
- ✓ Type S (0.05-0.9) or L (0.05-0.4 MPa)
- ✓ Gauge fitted, or no gauge (N)
- ✓ Thread PT / G / NPT (sets gauge scale)
- ✓ Bracket kept or removed (J)
- ✓ Need filtration too? Use GAFR500
Installation & Setting Notes
- check Install with the airflow arrow: IN to OUT, knob accessible.
- check Put a filter (GAF or a GAFR) UPSTREAM — a regulator does not clean the air.
- check Set pressure by turning the knob up to the target, then press it in to lock.
- check Keep supply at or below the 1.0 MPa (145 psi) max working pressure.
- check Never exceed the 1.5 MPa (215 psi) proof pressure.
- check Support the 580 g unit on its panel or bracket, not on the tubing.
This is a regulator only — it sets and holds pressure but does not filter or lubricate. Add a GAF filter, a GAL lubricator, or step up to the GAFR500-20 filter-regulator as your air-prep needs grow.
Airtac GAR Air Regulator GAR50020LJNK FAQ
The GAR50020LJNK is a regulator-only unit with a 3/4in port and a weight of 580 g. It regulates from 0.05 to 0.4 MPa (7-58 psi). Maximum supply pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and the temperature range is -20 to 70 C. It has no gauge and no bracket.
The N means no pressure gauge is fitted to this GAR50020LJNK. You read the downstream pressure on the line's own panel gauge or install a separate gauge. The J means no mounting bracket is included, so plan for a panel mount or an existing bracket.
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