The AirTAC GFR300C08ALJF2W AirTAC Filter Regulator 1/4" PT, 5 um 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 GFR300C08ALJF2W is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is configured with a 1/4 in PT port, a 5 um filter element (code W), an automatic drain, the low-pressure regulator type, a fitted embedded square gauge scaled in psi, and no mounting bracket. A reverse/check valve is not fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, PT, G (BSPP) or NPT threads, manual, automatic or differential-pressure drains, 40 um standard or 5 um elements, and gauge choices. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request before you order.
| Model | GFR300C08ALJF2W AirTAC Filter Regulator 1/4" PT, 5 um |
|---|---|
| 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) |
Assembly fixtures that clamp workpieces with air cylinders at reduced pressure need clean, dry air and a stable setpoint. This unit filters the shop air to 5 um, drains condensate automatically, and holds the clamping circuit at its low regulated pressure, with the psi gauge giving the operator a direct reading.
Bench-top presses and riveting heads run best on filtered air supplied at a reduced, repeatable pressure. Feeding the press through this 1/4 in filter regulator keeps scale and pipe debris out of the cylinder valves while the low-pressure regulator type matches the gentle setting such tooling requires.
Lab apparatus and low-pressure spray or coating lines are sensitive to both water carryover and pressure drift. This unit conditions the supply with a 5 um element, removes condensate automatically, and regulates the line at the low pressure the process calls for, monitored on the fitted square psi gauge.
Size and port step up with air demand: this 300-size unit carries a 1/4 in PT port, and the 400 or 600 sizes suit lines that need more air. The 5 um element (W code) is the choice when downstream equipment needs finer filtration than the 40 um standard, and the automatic drain ejects collected condensate without manual attention. The L code marks the low-pressure regulator type, intended for duties where the controlled pressure sits well below standard; its exact adjustment range is not published, so confirm your setpoint with us. The embedded square gauge reads psi, with external round gauges and MPa or bar scales available as order options. PT is the standard thread; G (BSPP) and NPT are order options. No mounting bracket is fitted with this code. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, your required set pressure and the air demand of the equipment downstream, and we will confirm the correct size and flow from the datasheet before you order.
The L code marks the low-pressure regulator variant, intended for duties where the controlled pressure sits well below the standard range. Its exact adjustment range is not published in the catalogue, so send us your setpoint and we will verify suitability from the datasheet. Everything else on this unit is standard GFR300: PT1/4 port, 5 um element, automatic drain and a square gauge scaled in psi.
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.