The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 5um Auto Drain 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 GFR300-15T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This size 300 unit comes with a 1/2 in NPT port, a 5 um filtration element, an automatic drain that ejects collected condensate without operator attention, a round psi gauge, a built-in reverse/check valve that helps hold the set pressure if the upstream supply drops, and a mounting bracket. The polycarbonate bowl suits the -5 to 70 C (non-freezing) working range.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) spanning ports from 1/8 to 1 in, with manual or differential-pressure drain options, 40 um or 5 um elements, embedded square or external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi). Flow is published as curves rather than a single rating, so ask us to confirm datasheet figures for your application.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 5um Auto Drain |
|---|---|
| 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 | Fitted — round, psi 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. |
|---|---|
| 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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) |
Point-of-use conditioning for the air drops feeding tool changers, clamps and spindle air seals on a CNC machining center, with 5 um filtration protecting tight-tolerance valves and the regulator holding a steady set pressure.
Conditioning the supply to pick-and-place cylinders and product diverters on a carton packaging line, where the automatic drain handles condensate on equipment that runs unattended across shifts.
Supply conditioning for spray guns and air-assisted applicators in a paint booth, where 5 um filtration helps keep dry, clean air reaching the finish and the regulator sets gun inlet pressure.
Size and port step up with air demand: size 300 with a 1/2 in NPT port suits lines drawing more air than 1/4 or 3/8 ports deliver, while size 200 covers lighter duty. Choose the 5 um element (this unit) when downstream valves, cylinders or instruments need finer protection than the 40 um standard. The automatic drain (code A) fits unattended or hard-to-reach positions; manual and differential-pressure drains are available, with the regulation range differing by drain type: 0.15-0.9 MPa (20-130 psi) for this automatic-drain unit versus 0.05-0.9 MPa (7-130 psi) with manual drain. Gauge scale is psi here, with MPa and bar alternatives, and the standard embedded square gauge can be specified instead of this external round type. Thread is NPT on this unit; PT (the standard) and G are order options. Because flow is published as curves rather than a single rated figure, send us your application details 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 G-series flow as curves, not a single rated figure, so we do not quote a rated flow number for this unit. Send us your application - required pressure, downstream consumption and duty cycle - and we will confirm the sizing from the datasheet before you order.
This unit carries drain code A: an automatic drain that ejects collected condensate on its own, suiting unattended or hard-to-reach installations. Manual-drain and differential-pressure-drain versions of the GFR300 are also available. Note the regulation range differs: 0.15-0.9 MPa (20-130 psi) for this automatic-drain unit, versus 0.05-0.9 MPa (7-130 psi) for the manual-drain version.
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.