The AirTAC GFR300-15T AirTAC Filter Regulator, NPT1/2, Auto Drain is a genuine G-series filter regulator: water separation, 40 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 regulates downstream pressure in a single body, so you mount one unit instead of a separate filter and regulator. This 300-size configuration is threaded NPT1/2 (1/2 in), carries a 40 um standard filter element, and has an automatic drain that expels collected condensate without operator attention - useful where the unit sits in an awkward spot or on a line that runs unattended. A round pressure gauge scaled in bar is fitted, the regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C (non-freezing). The bowl on this size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, with a choice of drain type (differential-pressure, automatic or manual), a 5 um element option (code W), gauge style and scale, and G (BSPP), NPT or PT threads. Flow for this series is published as curves rather than a single rated figure - ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator, NPT1/2, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, bar scale |
| 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Mounted at the drop to a pneumatic press or clamping station, it strips water and swarf from the shop air line and holds a steady regulated pressure to the cylinder circuit, with the automatic drain coping with condensate between shifts.
On a packaging or cartoning line, the unit conditions the 1/2 in main feeding conveyor diverters and bagging actuators, keeping moisture out of the valve bank while the round bar gauge lets operators verify set pressure at a glance.
Fitted at the point of use on a factory air main, it filters the compressed air feeding general plant equipment and regulates it to the pressure the downstream tools and actuators were designed for, draining condensate automatically.
Work through the decodable choices in order. First, size and port: the 300 size with a 1/2 in port suits lines where the required flow sits above what a 200/1/4 in unit carries; step up to 400 or 600 for larger mains, but confirm against the flow curves before ordering. Second, drain type: this unit has an automatic drain, which suits unattended or hard-to-reach positions; manual and differential-pressure drains are available on other codes if you prefer operator-controlled or pressure-differential draining. Third, filter grade: the fitted 40 um element is the standard grade for general air preparation; specify the 5 um W-code variant where finer protection is needed. Fourth, gauge: this code carries a round gauge in bar; embedded square gauges and MPa or psi scales are the other catalogue options. Thread is NPT here, with G (BSPP) and PT as order options, and a mounting bracket is included.
One honest routing note: AirTAC publishes flow for this series as curves, not as a single rated number, so we cannot quote a rated flow figure. Send us your application details and we will confirm the datasheet figures and correct sizing on request.
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 GFR series as performance curves rather than a single rated figure, so we do not quote a rated flow number. Send us your line pressure and demand details and we will confirm the datasheet flow figures and check the sizing for your application on request before you order.
This code carries the A drain option: an automatic drain that expels collected condensate from the polycarbonate bowl without operator attention, which suits unattended or hard-to-reach mounting points. The GFR300 is also catalogued with a manual drain (code M) and a differential-pressure drain (blank) if you prefer those behaviours; the manual-drain variant has a wider 0.05-0.9 MPa regulator adjustment range.
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.