The AirTAC GFR30015ALJF3WT AirTAC Low-Pressure Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR30015ALJF3WT is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body, with no lubricator. This configuration is built for a 1/2 in NPT port, carries the 5 um filter element (code W) for finer air cleaning than the standard 40 um grade, and drains condensate automatically, so the bowl empties itself as collected water builds. It is the low-pressure type, intended for circuits set below the standard regulator range, and it ships as coded with the embedded square gauge scaled in bar and no mounting bracket.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port options from 1/8 to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR30015ALJF3WT AirTAC Low-Pressure Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Fixture clamps and swing cylinders that hold parts at reduced set pressures get filtered, regulated air from one compact body, with the 5 um element protecting seal surfaces and the automatic drain keeping condensate out of the circuit.
Packaging lines running low-pressure actuator and hold-down circuits use this unit at the machine drop: the square bar gauge gives operators a direct setpoint readout and the automatic drain handles moisture without daily bowl checks.
Bench-scale process skids and pilot rigs that need clean, finely filtered air at a stable low pressure feed instruments and small actuators through the NPT1/2 port, with the 5 um grade guarding sensitive downstream components.
Sizing a GFR300 starts with the port and flow step: size 300 sits mid-range in the family, and moving to 400 or 600 buys more flow at the cost of a larger port and body. This unit is already fixed at NPT1/2 with the 5 um element, automatic drain, square bar gauge and no bracket, so the remaining choices are thread variant (PT and G are order options alongside NPT) and whether you would rather have the external round gauge or a different scale. The low-pressure type is the right pick only if your set pressure sits below the standard range; for general-purpose regulation choose the standard version. Because AirTAC publishes flow as curves and not a single rated figure, send us your flow and pressure requirements and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as characteristic curves, not as a single rated number, so we do not quote a figure here. Tell us your required flow and working pressure and we will confirm the datasheet curve for this exact configuration before you order.
The W in the code selects the 5 um filter element instead of the standard 40 um grade, for finer removal of water and particulate. The A selects the automatic drain, which expels collected condensate from the PC bowl on its own instead of relying on the differential-pressure action or manual draining. Both are standard catalogue options for the GFR300 size 300.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.