The AirTAC GFR300-10G AirTAC Filter Regulator G3/8, Auto Drain, 40 um 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 300-size unit is fitted with a G3/8 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and a round external gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size, and this configuration ships without a mounting bracket.
This is a genuine AirTAC part. The GFR family spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, a 5 um (code W) filter element option, embedded square or external round gauges with MPa, psi or bar scales, G or NPT thread options, and an optional reverse/check valve. 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 | GFR300-10G AirTAC Filter Regulator G3/8, Auto Drain, 40 um |
|---|---|
| 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 — round, 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 0.15 - 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. |
| J | Supplied without bracket. |
| (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. |
| (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 a workshop pneumatic press with cleaned, pressure-regulated air: the 40 um element strips water and particulate while the regulator holds a stable set pressure for consistent forming and riveting strokes.
Conditioning air for carton-sealing and case-packing cylinders on a packaging conveyor: the automatic drain keeps condensate out of valves and cylinders without daily bowl checks, and the psi gauge lets operators verify set pressure at a glance.
Installed at an assembly-bench air drop in a factory: one body filters the shop air and regulates it to tool-safe pressure, with the G3/8 port matching standard drop plumbing and the automatic drain suiting a drop that is rarely visited.
Start with size and port: the 300 body with a G3/8 port sits mid-range in the GFR line, and the right step depends on the flow your line needs - we confirm exact sizing from the published flow curves before you order. Then pick the drain: this unit has an automatic drain, which suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other configurations. The 40 um element is the standard grade; specify the 5 um (W) option where finer filtration is required. The round psi gauge is fitted here; embedded square gauges and MPa or bar scales are alternatives. Thread is G (BSPP) on this code, with PT as the standard and NPT available to order, and this configuration omits the mounting bracket.
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 that could mislead your sizing. Send us your application's flow and pressure requirements and we will confirm the correct size and the datasheet figures on request before you order.
The A in the code GFR30010AJC2G specifies an automatic drain, which ejects collected condensate by itself - useful where the unit is mounted out of reach or on a line that runs unattended. The GFR family is also available with a manual drain or the differential-pressure (blank) drain; tell us which suits your installation and we will confirm the matching model code.
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.