The AirTAC GFR300C08ALJF1WTK AirTAC Filter Regulator NPT1/4 is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet ports, a differential-pressure 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 AirTAC GFR300C08ALJF1WTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a 1/4 in NPT port, a 5 um filter element (code W instead of the standard 40 um), an automatic drain, and the low-pressure regulator type. A square pressure gauge with an MPa scale is fitted, a reverse (check) valve is built in, and the unit has a metal bowl. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and is offered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, standard or low-pressure regulation, square or round gauges on MPa, psi or bar scales, PT, G or NPT threads, and with or without a mounting bracket. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application before ordering.
| Model | GFR300C08ALJF1WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C0 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Filtering and regulating the air feeding gripper actuators on an assembly robot: the 5 um element keeps small pilot valves clean while the built-in check valve guards the circuit against backflow.
Conditioning the low-pressure line feeding spray guns in a finishing booth, where condensate and particles are drained off automatically and the regulator holds a steady supply to the guns.
Supplying filtered, regulated air to bench-top test instruments and pneumatic fixtures in a lab, where the low-pressure type and the square MPa gauge suit instrument-level settings.
Match the size and port to the air consumption of the circuit: this unit is size 300 with a 1/4 in NPT port, and the larger 400 and 600 sizes step up to bigger ports and more flow. Because flow for the GFR series is published as curves and not as a single rated figure, ask us to confirm sizing against your application before ordering. The other choices are already fixed in this code: 5 um filtration instead of the standard 40 um, an automatic drain instead of manual or differential-pressure, the low-pressure regulator type, a square gauge on an MPa scale, a built-in reverse (check) valve, no mounting bracket, and an NPT thread where PT is the standard and G (BSPP) and NPT are order options.
Since this regulator is the low-pressure type, its setting range is not published in our data; we confirm the exact range from the datasheet on request.
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 curves rather than a single rated figure, so we do not quote a number here. Tell us your operating pressure and air consumption and we will confirm the flow and datasheet figures for this unit on request.
Code A in this model is the automatic drain, which expels collected condensate from the bowl without manual attention. The alternatives in the series are a manual drain, which you bleed periodically, and the differential-pressure drain, which is the catalogue default. Drainage capacity figures are not published; ask us for the datasheet if you need them.
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.