The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2, 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This 300-size unit connects to a 1/2 in PT port, drains condensate automatically, filters to the standard 40 um grade, and carries an embedded square gauge scaled in psi. A reverse/check valve is fitted, the bowl is polycarbonate (PC), maximum inlet pressure is 1.0 MPa (145 psi), and the regulator adjusts from 0.15 to 0.9 MPa (20-130 psi) with the automatic drain. Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include manual or differential-pressure drains, a finer 5 um element (code W), G or NPT threads, gauge scales in MPa, psi or bar, and a mounting bracket. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — square, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Point-of-use air preparation at assembly stations: the filter section strips water and swarf from the shop-air drop while the regulator holds a steady pressure to the station's impact tools and clamps, and the automatic drain keeps condensate off the floor without operator attention.
Feeding a machining centre's pneumatic circuit: the 40 um element protects solenoid valves and air bearings from particulate, the regulator holds consistent actuator and tool-change pressure, and the fitted check valve holds the downstream circuit if supply pressure dips.
Supplying the taping and flap-folding cylinders on a carton-sealing conveyor: clean, regulated air keeps the sealing heads cycling at a consistent set pressure through the shift, and the automatic drain handles condensate that collects in a line that runs unattended.
Pick the size and port against the air demand of your line: this 300-size unit takes a 1/2 in PT connection, and larger sizes pass more flow. Drain options are automatic (fitted here), manual, or differential-pressure; the automatic drain suits unattended duty. The 40 um element is standard and a 5 um element (code W) is available where finer filtration is needed. The fitted square gauge reads psi, with MPa and bar scales, G or NPT threads, and a bracket available as order options. Because flow is published as curves rather than a single rating, send us your air demand 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a number that could mislead your sizing. Tell us your air demand and operating pressure and we will confirm the flow from the datasheet for this exact 300-size, 1/2 in PT unit before you order.
The code A in GFR30015AJF2K means the bowl drains condensate automatically, which suits installations that run unattended. Manual-drain (M) and differential-pressure (blank) versions of the same filter regulator can be ordered instead; note that with a manual drain the regulator adjustment range is 0.05-0.9 MPa (7-130 psi).
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.