The AirTAC GFR300-10 AirTAC Filter Regulator, 3/8 in NPT 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 GFR300-10 is a size-300 filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration has a 3/8 in NPT port, an automatic drain that ejects collected condensate without manual attention, a fine 5 um filter element, and standard regulation from 0.15 to 0.9 MPa (20-130 psi). No pressure gauge is fitted and no mounting bracket is included, so plan for a separate gauge and bracket if your panel needs them.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in in PT (standard), G and NPT threads, and choices of drain type, filter grade, gauge and bracket. Because AirTAC publishes flow only as capacity curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator, 3/8 in NPT |
|---|---|
| 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 | 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. 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. |
| (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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding filtered, regulated air to the tool-change clamps and pneumatic actuators on a machining centre, where the 5 um element helps keep moisture and chips out of precision clamping circuits.
Supplying clean, pressure-set air to the diverters, pushers and gate cylinders on a packaging conveyor, with the automatic drain handling condensate on a line that runs unattended.
Conditioning the air at a machine drop on a textile or garment production floor, combining water and lint filtration with a stable regulated supply to the machine's pneumatic controls.
Size 300 with a 3/8 in port suits lines that need more flow than 1/4 in size-200 units, but confirm your air demand against the published flow curve before ordering - we will check the datasheet figure for you on request. This unit pairs a 5 um element (code W) with an automatic drain: choose 5 um when downstream valves, cylinders or instruments need finer protection than the 40 um standard, and automatic draining when the unit sits where regular manual draining is impractical. Regulation is the standard type, 0.15-0.9 MPa (20-130 psi); a low-pressure type is available in the family if you need settings below that. The thread here is NPT; PT is the catalogue standard and G (BSPP) is also orderable. No gauge is fitted with this code - add a gauge order if you want a local pressure indication, and note the J code means no mounting bracket is supplied.
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 this series as capacity 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 figure from the datasheet on request before you order.
The A code in GFR300-10 specifies an automatic drain, which ejects collected condensate on its own - useful where the unit is mounted in a hard-to-reach spot. The GFR family also offers manual (M) and differential-pressure (blank) drain options if you prefer a different arrangement.
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.