The AirTAC GFR30010AJNWTK AirTAC Filter Regulator NPT 3/8 in 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 PT3/8" 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 GFR30010AJNWTK is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration carries a 5 um filter element for finer particle capture than the standard 40 um grade, an automatic drain that expels collected condensate without operator attention, and a built-in reverse (check) valve that holds downstream pressure if the supply side drops. It is supplied without a pressure gauge and without a mounting bracket, and the port is NPT 3/8 in.
This is a genuine AirTAC part in the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G and NPT thread options. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30010AJNWTK AirTAC Filter Regulator NPT 3/8 in |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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. |
|---|---|
| 10 | Port size PT3/8". 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use conditioning for the solenoid valves and pneumatic clamps on a CNC machining center: the 5 um element captures fine particles ahead of the valve manifold while the regulator holds a steady setting for repeatable clamping.
Conditioning the air feeding diverters, stoppers and pusher cylinders on a packaging conveyor line, where the automatic drain removes condensate without a technician having to visit each drop during a shift.
Clean, regulated air to the valve manifold controlling filler and capper actuators on a bottling line; the check valve helps hold the downstream setting if the header pressure dips while other machines cycle.
Start with the port step: this unit is 3/8 in NPT in the 300 size; if your line needs more flow, the 400 or 600 sizes step up in port and body, and we can confirm the flow curves against your demand before you order. The 5 um element here suits air that feeds valves, actuators or instruments sensitive to fine particles; the standard 40 um grade is the coarser alternative. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other codes. A gauge can be added on codes that include one, and this unit has none fitted. Thread options are PT (standard), G and NPT; bracket options exist where the code carries one.
Because flow is published as curves and not a single rated figure, do not size from a number on a page: send us your application and we will confirm the correct size and port from the datasheet 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 figure on the page. Send us your application details and we will confirm the flow curve and correct sizing from the datasheet on request.
The N in the code means no gauge is fitted; gauge-equipped GFR300 codes are available if you want a local pressure readout. The W in the code sets the 5 um filter element, a finer grade than the standard 40 um, better suited to feeding valves, actuators and instruments that are sensitive to fine particles.
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.