The AirTAC GFR300-10 AirTAC Filter Regulator, PT3/8, 5 um, Auto 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 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This 300-size unit is tapped PT3/8 (3/8 in), carries the 5 um element (code W) for finer filtration than the 40 um standard, and drains condensate automatically, so it suits lines that run unattended. The fitted round gauge reads in psi, a reverse/check valve is built in, and the mounting bracket is included.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drain, 40 um or 5 um filtration, and G or NPT thread variants to order. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-10 AirTAC Filter Regulator, PT3/8, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 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 | 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). |
| 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. |
| (blank) | PT 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 clean, regulated air to a machining centre's pneumatic tool-changer and clamping circuits, where the 5 um element protects precision valves from particles and water.
Conditioning the air that drives carton-forming and case-sealing cylinders on a packaging conveyor, with the automatic drain keeping condensate off the line during long unattended runs.
Serving as the point-of-use filter regulator at an assembly bench air drop, holding a steady working pressure for air tools and small actuators while the psi gauge lets operators verify the setting.
Size and port set the flow path: this 300-size unit steps up to PT3/8 (3/8 in), one step above the 1/4 in class, so pick it when your line needs more air than a 200-size unit feeds. The 5 um element (W code) is the finer choice over the 40 um standard - use it where downstream valves and instruments prefer cleaner air. The automatic drain handles condensate without manual attention; manual and differential-pressure drains are the alternatives in this family. The round gauge reads psi, and MPa or bar scales are also available. Thread here is PT, the standard; G (BSPP) and NPT are order options. Bracket included.
One honest note before you order: AirTAC publishes flow as curves, not a single rated figure, so send us your application details and we will confirm the sizing against the datasheet before you commit.
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 GFR300 series as curves, not as a single rated number, so we do not quote a figure here. Tell us your application - working pressure and the air your equipment needs - and we will confirm the correct sizing from the datasheet on request.
This configuration carries the automatic drain (code A), which expels collected condensate without anyone opening the bowl - useful on lines that run unattended. The GFR family also offers a manual drain and a differential-pressure drain as alternatives; note that the regulation range differs by drain type, and for the automatic drain it is 0.15-0.9 MPa (20-130 psi).
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.