The AirTAC GFR300-10 AirTAC Filter Regulator NPT 3/8, 5um, 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 a regulated downstream pressure in one body. This unit is the 300 size with a 3/8 in NPT port, built as the low-pressure type for circuits that run at reduced pressure. It carries a 5 um filter element (code W), an automatic drain that purges collected condensate without manual attention, an embedded square gauge reading in psi, and a polycarbonate bowl with the mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options for manual or differential-pressure drains, a 40 um standard element, gauge scales in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet details for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator NPT 3/8, 5um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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. 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure 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. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Supplies filtered, reduced-pressure air to clamp cylinders on an assembly fixture, with the 5 um element protecting seals and the psi gauge letting setters verify the clamp setting at the station.
Feeds spray guns on a paint line where the 5 um element keeps water and fine particulate out of the finish and the low-pressure regulator holds the reduced atomizing-air setting.
Runs guide-rail adjusters and reject flaps on a packaging conveyor at reduced pressure, with the automatic drain handling condensate on a line that runs unattended.
Size and port step up from 200 through 600, so pick the 300 / 3/8 in frame against the flow your line needs - we can check the published curves with you. Drain choice is automatic (this unit), manual, or the differential-pressure default; automatic suits unattended installations. Filter grade is 5 um here versus the 40 um standard element when finer particulate removal matters. The gauge is the embedded square type with a psi scale; MPa or bar scales and an external round gauge are alternatives. Thread is NPT on this model; PT is the AirTAC standard and G (BSPP) is orderable. A bracket is included. The L code marks the low-pressure regulator type - its exact adjustment range is not published, so confirm it with us against your set pressure before ordering.
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 GFR300 as curves, not a single rated figure, so we do not quote one number. Send us your flow and pressure requirements and we will confirm sizing from the datasheet before you order.
The L code makes this a low-pressure regulator for circuits set below standard plant pressure. Its exact adjustment range is not published in the catalogue, so tell us your set pressure and we will confirm suitability from the datasheet.
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.