The AirTAC GFR300-10 AirTAC Filter Regulator, G3/8, 5 um, Low-Pressure 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 PT3/8" 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point, in a single body. This 300-size unit carries a G3/8 (BSPP) port, the 5 um (W) filter element for finer filtration than the standard 40 um grade, a manual-drain polycarbonate bowl, and the low-pressure regulator type. A round psi gauge is fitted so the set point can be read directly, and a reverse (check) valve is fitted. Mounting bracket included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, plus catalogue options for drain type, filter grade, gauge style and scale, thread (PT standard, G or NPT to order) and bracket. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator, G3/8, 5 um, Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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. 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure 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. |
| 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding workholding clamps on a CNC fixture line, where the operator sets a low regulated pressure to hold parts firmly without marking them, and the 5 um element keeps sludge and pipe scale out of the clamp cylinders.
Supplying the sealing and bagging cylinders on a packaging line, where clean, regulated air at a modest pressure keeps seal jaws consistent through the shift and the manual drain is emptied during routine line checks.
Regulating atomizing air to spray guns in a finishing booth, where the low-pressure regulator type, fine 5 um filtration and a visible psi gauge let the finisher hold a repeatable gun setting from panel to panel.
The GFR300 sits mid-range in the GFR series: step up or down a size (200/300/400/600) as your port and flow duty require, with port codes 06 through 25 covering 1/8 to 1 inch. This unit is already specified with the 5 um (W) element, manual drain, low-pressure regulator type, round psi gauge and G thread; the standard 40 um grade, automatic or differential-pressure drain, an embedded square gauge with MPa or bar scale, and PT or NPT thread are catalogue options on adjacent codes. Flow is published as curves, not a single rated figure, so send us your flow and pressure requirements 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 here. Send us your required flow and working pressure and we will confirm the datasheet figures for this 3/8-inch unit before you order.
This GFR300-10 uses a manual drain: the polycarbonate bowl is emptied by hand, which suits installations checked as part of a routine walk-round. If the unit will sit where it cannot easily be reached, the catalogue also offers automatic and differential-pressure drain options on other codes in 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.