The AirTAC GFR300-15G AirTAC Filter Regulator G1/2, 5 um, Manual 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 regulates downstream pressure in one body. This configuration is the 300 size with a 1/2 in port in G (BSPP) thread, fitted with a 5 um filter element (the finer of the two catalogue grades), a manual drain for the PC bowl, an embedded square gauge reading in psi, and the standard regulator with a 0.05-0.9 MPa (7-130 psi) adjustment range. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). No mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family is offered in 200, 300, 400 and 600 sizes with a choice of port, thread (PT standard; G and NPT as order options), drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional) and gauge scale. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR300-15G AirTAC Filter Regulator G1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| W | Filtering grade 5 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. |
| (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) |
Feeds spray guns and atomising air on a finishing line, where the 5 um element helps keep water and particulate out of the finish and the regulator holds a steady gun pressure.
Sits ahead of solenoid valves and air bearings on a machining centre, cleaning the shop air supply and setting the stable pressure the machine's pneumatic circuit was designed around.
Supplies cylinders and grippers on a packaging conveyor, filtering condensate and debris from the header air while the manual-drain bowl is emptied during scheduled line stops.
Size and port step up from 200 through 600, so match the 300 / 1/2 in size against the flow your line needs and ask us to check it against the published curves before ordering. Drain type is a real choice here: this code has a manual drain, which also widens the regulation range to 0.05-0.9 MPa (7-130 psi); automatic and differential-pressure drains are available and regulate from 0.15-0.9 MPa (20-130 psi). The 5 um element in this code suits air that is a step cleaner than the 40 um standard. The embedded square gauge reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is G (BSPP) on this code, with PT standard and NPT as order options, and no mounting bracket is fitted.
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 curves, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow curve and sizing from the datasheet on request before you order.
This code carries drain code M, so the PC bowl is emptied by hand at intervals you set. With a manual drain the regulator adjustment range is 0.05-0.9 MPa (7-130 psi); the automatic and differential-pressure drain versions regulate from 0.15-0.9 MPa (20-130 psi). Choose manual where the drain point is easy to reach on a maintenance round.
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.