The AirTAC GFR300-15 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 GFR300-15 is a size-300 filter regulator: water and particulate removal plus downstream pressure regulation in a single body. This configuration carries a 1/2 in NPT thread, a 5 um filter element (the finer of the two catalogue grades), and an automatic drain that ejects collected condensate without manual attention. No gauge is fitted (code N) and no mounting bracket is included (code J), so plan your gauge and bracket sourcing accordingly. The polycarbonate bowl is standard at this size, and maximum inlet pressure is 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT, G and NPT threads, differential-pressure, automatic or manual drains, and 40 um or 5 um elements. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and curve data for your application before ordering.
| Model | GFR300-15 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 | 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. |
|---|---|
| 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. |
| (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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding cylinders on a carton-sealing or case-packing conveyor, this unit cleans the shop air to 5 um and holds a steady regulated pressure to the directional valves, while the automatic drain keeps condensate out of the actuators without an operator stopping by.
On a machining centre's fixture-clamping circuit, the GFR300-15 removes water and fine particulate ahead of the clamping cylinders and regulates the holding pressure, protecting the clamping valves from contamination in a single compact body.
At a bench drop on an assembly line running air tools and small cylinders, this filter regulator gives each station its own cleaned, regulated supply at the 1/2 in connection, with the automatic drain handling moisture in a busy multi-shift shop.
Choose the GFR300 step when your line sits in the mid-flow band of the series: size 300 pairs a 1/2 in port with the 300-series body, one step up from 1/4 in size-200 units and below the 400 and 600 frames. Pick the drain to match attendance: automatic (this model) suits unattended or hard-to-reach installations, manual suits stations visited daily, and differential-pressure drain is the catalogue default. The 5 um element here is the finer grade; the 40 um standard grade suits general upstream protection where finer filtration is handled elsewhere. This unit ships without a gauge or bracket, so add a gauge and bracket separately if your panel needs a local pressure readout or wall mounting. Thread is NPT here; PT (standard) and G are the other catalogue options. Flow is published as curves, not a single rating, so 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as performance curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your application details and we will confirm the datasheet and curve data for this exact model on request.
The N in the code means no gauge is fitted; a gauge can be added as a separate catalogue option if you want a local pressure readout. The A code means an automatic drain: collected condensate is ejected from the polycarbonate bowl without manual intervention, which suits unattended installations.
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.