The AirTAC GFR300C08ALJF2WTK 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 GFR300C08ALJF2WTK is a GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 300 configuration carries a 1/4 in NPT port, a 5 um filter element (code W), an automatic drain, and the low-pressure regulator type. A square pressure gauge scaled in psi is fitted, a reverse (check) valve is built in, the metal bowl is fitted, and the unit is supplied without a mounting bracket. 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 family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and is ordered with manual, automatic or differential-pressure drains, 40 um standard or 5 um elements, embedded square or external round gauges in MPa, psi or bar scales, and with or without a reverse valve. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before you order.
| Model | GFR300C08ALJF2WTK 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 low-pressure pilot supply to pneumatic positioners and control valves on a water-treatment skid, with the automatic drain handling condensate on lines that stay pressurised and the square psi gauge giving a local readout at the panel.
Supplying clean, regulated air to low-pressure clamping and swing cylinders on a machining-centre fixture, where the 5 um element protects small pilot orifices and the built-in reverse valve is fitted per the code.
Conditioning the compressed-air feed to analytical instruments and pneumatic sample-handling actuators in a quality-control lab, where the 5 um grade, automatic drain and psi-scaled square gauge suit a monitored instrument panel.
Size and port set the flow path: this unit is size 300 with a 1/4 in NPT port; step up to size 400 or 600 where the line needs a larger port, and match the thread to your piping - PT is the standard, with G (BSPP) and NPT as order options, which is how this unit gets its NPT1/4 connection. Drain choice matters: automatic drains discharge condensate without attention, manual drains are emptied by hand, and the differential-pressure drain is the family default. This unit carries the automatic drain and the 5 um element (the 40 um element is the standard grade if finer filtration is not needed). The gauge scale - MPa, psi or bar - is chosen at order time; this one reads psi on the embedded square gauge. This unit is the low-pressure regulator type; its exact regulation range is not published in the catalogue, so we confirm it from the datasheet on request. Flow itself is published as curves, not a single rating, so send us your flow requirement and we will confirm sizing against the application 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 GFR flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and required flow and we will confirm the sizing from the GFR300 datasheet on request before you order.
The A in the code fits the automatic drain, which discharges condensate from the bowl without manual attention - useful on lines that stay pressurised. The same GFR300 body is also ordered with a manual drain, or with the differential-pressure drain that is the family default; you choose the drain at order time.
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.