The AirTAC GFR30008ALJF2W AirTAC Filter Regulator PT1/4 5 um 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 PT1/4" 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 AirTAC GFR30008ALJF2W is a GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point, in one compact body. This configuration is sized GFR300 with a 1/4 in PT port, fitted with the finer 5 um filter element, an automatic drain that ejects collected condensate without manual attention, the low-pressure regulator type, and the embedded square gauge scaled in psi. No mounting bracket is included (code J).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, PT as standard and G or NPT threads as order options, with manual, automatic or differential-pressure drains, 40 um or 5 um elements, and MPa, psi or bar gauge scales. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing; the bowl on this size is polycarbonate. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR30008ALJF2W AirTAC Filter Regulator PT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT 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, psi 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a CNC fixture line, the GFR30008ALJF2W cleans the shop air to 5 um, drains condensate automatically and holds a reduced, stable pressure for clamping cylinders that cannot be fed full line pressure.
At a sortation hub, this filter regulator conditions the 1/4 in PT feed to diverters and stopper cylinders, keeping water and debris out of directional valves while the low-pressure type regulator matches the actuators' reduced-pressure supply.
On a laboratory pneumatic test bench, the 5 um element and automatic drain protect sensitive instruments from condensate and particles, and the psi-scaled square gauge lets operators set and read the reduced pressure directly.
Choose the size step by required flow: GFR300 with its 1/4 in PT port sits in the middle of the range (200, 300, 400, 600), and stepping up a size gives a larger port and more flow capacity - confirm the exact figure against the published curves before ordering. Drain: this unit has an automatic drain, which suits unattended installations; manual and differential-pressure drains are the other catalogue choices. Filter grade: the 5 um element here is the finer option; 40 um is the standard grade. The embedded square gauge is scaled in psi; MPa and bar scales and an external round gauge are alternatives. Thread is PT as standard, with G (BSPP) and NPT as order options, and this configuration omits the mounting bracket. Because flow is published as curves, not 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 GFR300 as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and the full datasheet figures on request before you order.
The code W sets the finer 5 um element instead of the 40 um standard grade, and A sets the automatic drain, which ejects collected condensate without manual attention. If your line has manual drain routines or coarser filtration is sufficient, ask us about the alternative GFR300 codes.
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.