The AirTAC GFR300-15G AirTAC Filter Regulator, G1/2, 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 GFR300-15G is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration has a G1/2 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, the standard 40 um filter element, an embedded square gauge reading in psi, and a reverse/check valve that helps hold downstream pressure if the supply dips. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the adjusted outlet range with automatic drain is 0.15-0.9 MPa (20-130 psi). The bowl is polycarbonate; only size 600 units use an aluminium alloy bowl. No mounting bracket is fitted on this code.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, a choice of automatic, manual or differential-pressure drain, 40 um or 5 um (code W) filtration, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application.
| Model | GFR300-15G AirTAC Filter Regulator, G1/2, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) 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. |
| G | G (BSPP) 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) |
Conditioned air for cylinders and grippers on a robotic assembly line: the 40 um element and regulation protect actuators, the psi gauge lets technicians verify setpoints at the panel, and the automatic drain handles condensate through two-shift running.
A regulated supply for diverters, pushers and sealing cylinders on a packaging conveyor. The reverse/check valve helps hold cylinder position during brief supply dips, while the automatic drain keeps the bowl clear without operator rounds.
Point-of-use conditioning for tool-change and clamping circuits on a machining centre. The G1/2 port suits the machine's main air drop, the square psi gauge supports local setpoint checks, and the 40 um grade shields directional valves from water and debris.
Size and port set the air capacity: step up from size 200 to 600 (ports 1/8 to 1 inch) as your flow demand grows. On this 300-size unit the code fixes an automatic drain (no daily bleeding of condensate), the standard 40 um element (choose code W for 5 um where finer protection matters), a square gauge on the psi scale, and a reverse/check valve. The thread here is G (BSPP); PT is the AirTAC standard and NPT is an order option. Brackets are optional and this configuration has none. Flow is published as curves, not a single rating, so send us your line pressure and air consumption and we will confirm sizing from 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 rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and air consumption and we will confirm the exact flow figures from the datasheet before you order.
The A code fits an automatic drain that ejects collected condensate on its own, which suits unattended or multi-shift installations. The default differential-pressure drain responds to pressure build-up, and a manual drain needs regular bleeding. On this automatic-drain configuration the regulation range is 0.15-0.9 MPa (20-130 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.