The AirTAC AirTAC GFR300-10 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 300-size filter regulator that cleans compressed air and holds downstream pressure in a single body. This configuration is fitted with a 5 um filter element (code W) for finer removal of water and particulate than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a reverse/check valve that helps hold the downstream setting when upstream supply is interrupted. The external round gauge supplied reads in psi, so the 0.15-0.9 MPa (20-130 psi) adjustment range can be set directly against your plant's scale. The port is PT3/8 (3/8 in, PT thread), and the polycarbonate bowl suits the 300 size frame.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, square or round gauges in MPa, psi or bar scales, and G (BSPP) or NPT threads as order options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | AirTAC GFR300-10 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. |
| 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. |
| 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) |
Filter and regulate the air feeding a bank of directional control valves on an automated machine, with the 5 um element protecting spool clearances and the check valve holding the set pressure through brief supply dips.
Condition the air supplying conveyor stopper and clamp cylinders on a packaging or bottling line, where the automatic drain keeps condensate out of the circuit without an operator visiting the drop.
Serve as the point-of-use filter regulator at a maintenance or assembly workstation drop, giving the operator a local psi gauge to set tool air pressure and a fine 5 um element ahead of air tools.
Size and port set the flow capacity: the 300 frame with a 3/8 in PT port sits above the 200 series for higher-demand lines, but because flow is published as curves rather than a single rating, ask us to confirm the GFR300-10 against your required flow before ordering. The 5 um element is the right choice when downstream valves, cylinders or instruments need finer air than the standard 40 um grade; note that finer filtration trades against pressure drop. The automatic drain suits unattended or hard-to-reach installations, while manual and differential-pressure drains remain available in the family. The round psi gauge matches US practice, and embedded square gauges in MPa/psi/bar are alternatives. PT is the standard thread; G (BSPP) and NPT are order options. This unit ships without a mounting bracket (code J) - brackets are available if you want panel or wall fixing.
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 G-series flow as performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or l/min number. Send us your required flow and working pressure and we will confirm the sizing against the GFR300 datasheet on request before you order.
A in the code selects the automatic drain, which discharges collected condensate on its own instead of waiting for a manual twist, and W selects the finer 5 um element over the standard 40 um grade. The trailing K means a reverse/check valve is fitted, so the downstream setting is better held if upstream pressure is lost. The J indicates no mounting bracket is included.
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.