The AirTAC GFR30008AJC3WTK 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 GFR300 series combines water and particulate filtration with downstream pressure regulation in a single body, so one 1/4 in connection both cleans the air and sets a stable working pressure for the equipment it feeds. This configuration, GFR30008AJC3WTK, carries a 5 um filter element for finer particle removal than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, a round pressure gauge reading in bar, a reverse/check valve, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range is 0.15-0.9 MPa (20-130 psi), the polycarbonate bowl suits non-freezing compressed air from -5 to 70 C, and the port thread is NPT.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the line you can order manual, automatic or differential-pressure drains, 40 um or 5 um elements, embedded square or external round gauges with MPa, psi or bar scales, G, NPT or PT threads, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR30008AJC3WTK 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 — round, 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). |
| C | Gauge shape: Round. 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) |
Feeding clamps and swing cylinders on a machining centre: the 5 um element keeps fine particles out of the clamp valves while the regulator holds the clamping pressure the fixture was set up for, and the bar gauge lets the setter read the setting directly.
A drop point on a packaging or case-erector line where cylinders and actuators need clean, regulated air at a fixed pressure; the automatic drain handles condensate at an unmanned station, and the check valve holds the set pressure if upstream supply dips.
Point-of-use preparation at a spray booth or finishing station, where the 5 um grade gives finer filtration ahead of the gun and the regulator sets the atomising pressure; the round bar gauge gives the operator a clear readout at the station.
Start with the size and port: GFR300 is the 300 frame with a 1/4 in port, one step up from the 200 frame, and the right choice depends on the flow your line needs - we can check the published flow curves against your demand before you order. This unit already specifies the finer 5 um element (the standard grade is 40 um), an automatic drain (manual and differential-pressure drains are the alternatives), a round bar-scale gauge (the embedded square gauge with MPa, psi or bar scales is the standard option), an NPT thread (PT is the standard thread; G/BSPP and NPT are order options), a fitted reverse/check valve, and no bracket. If you need a different combination of these decodable choices, tell us and we will identify the matching 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your line pressure and the air demand of your equipment and we will confirm the flow from the datasheet curves on request, before you order.
This code carries drain type A, an automatic drain that expels collected condensate from the polycarbonate bowl without anyone opening it - useful at unmanned or hard-to-reach points. The catalogue alternatives are a manual drain, which you open yourself, and the differential-pressure drain, which is the default type. All three are orderable choices on the GFR300 frame.
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.