The AirTAC GFR300-15AJNWTK AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 GFR300-15AJNWTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 1/2 in NPT port, a 5 um filter element (the finer of the two catalogue grades), an automatic drain that ejects collected condensate without manual attention, a built-in reverse/check valve, and no gauge fitted. The standard regulator adjusts outlet pressure across 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C (non-freezing). The polycarbonate bowl suits the size-300 frame; only the size-600 units use an aluminium alloy bowl.
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, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um elements, gauge options, and PT, G or NPT threads. Because flow is published as curves rather than a single rating, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-15AJNWTK AirTAC Filter Regulator NPT1/2 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (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 | Not fitted |
| 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| N | No pressure gauge (N). |
| (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. |
| 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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding a stamping or forming press's air cylinders with filtered, regulated air: the 5 um element screens particulate before the valves, the regulator holds a stable set pressure stroke to stroke, and the automatic drain clears condensate without stopping the machine.
Supplying air-actuated diverters, clamps and pushers on a packaging conveyor, where the check valve holds the downstream circuit if upstream air drops and the automatic drain keeps moisture out of the actuator supply during continuous shifts.
Conditioning air ahead of spray guns in a finishing booth: the 5 um element reduces particulate reaching the gun, the regulator sets the atomising pressure at the booth, and the automatic drain handles the condensate that accumulates through a painting shift.
Size and port set the capacity envelope: this unit is size 300 with a 1/2 in NPT port, one step up from the 300-10 (3/8 in) and one below the 400 series. Choose the finer 5 um element (code W) when downstream valves, cylinders or instruments need cleaner air than the 40 um standard; the automatic drain (code A) suits unattended installations where condensate must be expelled without operator rounds. The fitted check valve (code K) holds downstream pressure if upstream supply is interrupted. No gauge is fitted with this code, so add one separately if a local pressure indication is needed, and note that no mounting bracket is included.
Flow for this family is published as curves, not a single rated figure, so we do not quote a number here. Send us your application's flow and pressure requirements and we will confirm sizing against the datasheet before you order.
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 family as curves, not as a single rated figure, so we do not state a number here. Tell us your required flow and working pressure and we will confirm the sizing against the datasheet on request before you order.
This unit carries drain code A: an automatic drain expels collected condensate from the bowl without manual intervention, which suits unattended or continuous-duty installations. With an automatic drain, the regulator adjustment range is 0.15-0.9 MPa (20-130 psi); manual-drain variants of this family open a wider 0.05-0.9 MPa range. Note this configuration has no gauge fitted and no mounting bracket included.
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.