The AirTAC GFR30008AJF3WTK AirTAC Filter Regulator NPT1/4 5um 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 GFR30008AJF3WTK is a size 300 filter regulator that combines water and particulate filtration with downstream pressure regulation in a single body. This configuration carries a 1/4 in NPT port, a fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, an embedded square gauge reading in bar, and a reverse/check valve fitted to hold downstream pressure when the upstream supply is lost. The polycarbonate bowl suits this size, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um elements, gauge options and scale choices, and bracket variants. Flow figures for the series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30008AJF3WTK AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Feeds filtered, regulated air to the tool-clamp and chip-clearing circuits of a CNC machining centre, with the 5 um element protecting precision valves and the check valve holding clamp pressure during a supply dip.
Conditions the air feeding diverter gates, sealing jaws and counting cylinders on a packaging conveyor, where the automatic drain copes with condensate on a line that runs unattended through shifts.
Prepares air for pick-and-place grippers on a robotic assembly cell, with the bar-reading square gauge giving the technician a clear setpoint and the 5 um grade guarding the gripper's pilot valves.
Start with the port step: this unit is size 300 with a 1/4 in NPT port; larger sizes (400, 600) move to bigger ports and higher flow capability, so match the size step to your line's air demand. The 5 um element here is the finer of the two published grades (40 um standard, 5 um with code W) - choose it where downstream valves and instruments need cleaner air. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are alternatives in the series. The square gauge is fitted here reading in bar; MPa and psi scales and an external round gauge are available. Thread is NPT on this code, with PT (standard) and G as order options. A bracket can be added by choosing a code without the J suffix. 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. The reflux valve permits reverse flow 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 l/min or SCFM number. Tell us your application and we will confirm the datasheet flow figures for this size 300, 1/4 in unit on request.
The W in the code selects the finer 5 um filter grade instead of the 40 um standard, and the A selects the automatic drain, which ejects collected condensate on its own. Both are standard catalogue choices - the 40 um grade and manual or differential-pressure drains are available on other codes in the series.
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.