The AirTAC GFR300-10G AirTAC Filter Regulator 3/8 in Low-Pressure 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 PT3/8" 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 GFR300-10G is a filter regulator: it removes water and particulate from compressed air and holds the downstream pressure at your set point in one compact body. This 300-size unit carries a 3/8 in G (BSPP) port, an automatic drain that expels collected condensate from the PC bowl without manual intervention, a 40 um standard filter element, and an embedded square gauge scaled in psi. It is the low-pressure type of the GFR300 series, intended for circuits whose set point sits in the lower part of the working range.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um (code W) filtration, gauge scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300-10G AirTAC Filter Regulator 3/8 in Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 | 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| (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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding the cylinders and grippers of a bagging or cartoning line: the GFR300-10G cleans the shop air and holds a steady set point for repeatable motion, while the automatic drain keeps condensate out of the bowl without operator rounds.
Supplying clamp cylinders at a CNC cell: filtered, regulated air keeps clamp force consistent part after part, and the embedded square psi gauge lets the setter verify the set point right at the fixture.
Actuating sorting gates or pusher divertors that run at a modest set point: the low-pressure regulator type is built for that duty, with the square gauge giving the line technician a direct pressure check.
Size the unit by port and demand: the 300 size with a 3/8 in G port sits between the 1/4 in (200) and 1/2 in (400) steps, so match the published flow curve to your air consumption rather than guessing. This configuration is coded for an automatic drain (condensate leaves the bowl with no manual twist), the 40 um standard element (specify W for the 5 um grade), a square gauge reading in psi (MPa or bar scales are order options), and the low-pressure regulator type - its exact adjustment range is not published, so confirm it with us. Threads come as PT standard with G or NPT as order options, and a mounting bracket is included. Because flow is published as curves, not a single rating, ask us to confirm sizing against your application before ordering.
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 curves, not as a single rated figure, so we do not quote a number here. Send us your air consumption and working pressure and we will confirm the correct size and the datasheet figures on request.
This model is coded A for an automatic drain: condensate collected in the polycarbonate bowl is expelled without anyone opening a drain cock, which suits lines that run unattended. Differential-pressure (the family default) and manual drains are also available as order variants of the same series.
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.