The AirTAC AirTAC GFR300-10G Filter Regulator G3/8 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 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 regulates downstream pressure in one body. This unit is built on the 300 size with a G3/8 (BSPP) port, a 40 um standard filter element, and an automatic drain that bleeds collected condensate from the PC (polycarbonate) bowl without manual attention. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), and the embedded square gauge fitted here reads in psi so setpoints can be checked at a glance. A reverse/check valve is fitted, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, a 5 um (code W) element option, gauge scale choices, and G or NPT thread variants to order. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | AirTAC GFR300-10G Filter Regulator G3/8 Auto Drain |
|---|---|
| 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 | 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding clean, pressure-regulated air to a bench pneumatic press or clamping fixture, where the automatic drain keeps condensate out of the cylinder and the psi gauge lets the setter dial in the clamping pressure.
Conditioning the air supply to packaging machinery actuators and diverters, with the 40 um element catching pipe scale and the check valve holding the set pressure if the upstream supply dips.
Dropping line pressure to a stable, readable level for a CNC or machine-tool air manifold, using the included bracket to mount the unit at the machine and the square gauge for at-a-glance verification.
For this configuration you have already chosen the 300 size with a G3/8 port, automatic drain, 40 um filtration, a square psi gauge and a check valve. If your line needs finer filtration for sensitive valves or instruments, the 5 um W-grade element is the alternative to the standard 40 um; if the installation is unmanned, automatic drain (as here) avoids the manual blowing-down that a manual-drain bowl needs, while the differential-pressure default suits steady-duty plant air. Thread is G (BSPP) on this unit; PT is the catalogue standard and NPT is available to order. Size up a step (400 or 600) if your air demand sits near the top of the 300 curve.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the datasheet curve against your required flow 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 performance curves rather than a single rated figure, so we do not quote a flow number here. Tell us your working pressure and air demand and we will confirm the datasheet curve for this 300-size, G3/8 unit against your application on request.
The A in the code GFR30010AF2GK specifies an automatic drain, which expels collected condensate from the bowl without operator attention - useful for unmanned or hard-to-reach installations. The GFR family is also available with a manual drain or the differential-pressure default, and with a 5 um (W) element if finer filtration is needed.
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.