The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in NPT, 5 um 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: one body removes water and particulate from compressed air and sets the downstream pressure. This 300-size unit is ordered with a 3/8 in NPT port, an automatic drain that ejects collected condensate without manual attention, and a 5 um filter element (code W) for finer filtration than the 40 um standard. It is the low-pressure type (code L), fitted with an external round gauge on the MPa scale and a reverse (check) valve, and the mounting bracket is included. The polycarbonate bowl suits the 300 size; maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of drain type, 40 um standard or 5 um filtration, gauge style and scale, G, NPT or PT thread, and bracket options, with an operating range of -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm sizing and the full datasheet for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in NPT, 5 um |
|---|---|
| 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 — round, MPa 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. 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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. |
| 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 filtered, regulated air to the actuator heads and grippers on a bottling or packaging line, where the automatic drain keeps condensate out of the valves during continuous shifts.
Supplying pilot air to pneumatically actuated control valves in a water-treatment or chemical plant, with the 5 um element protecting sensitive pilot components from particulate and water.
Regulating low-pressure air to spray guns and air tools at an automotive paint-prep bench, with the round MPa gauge giving a clear setting reference and the check valve holding the downstream setting.
Within the GFR family the real choices are the size and port step (200/300/400/600, 1/8 in to 1 in) matched to the flow your line needs; the drain type (differential-pressure standard, automatic as on this unit, or manual); the filter grade (40 um standard, 5 um with code W); gauge style and scale (embedded square standard, external round optional, MPa/psi/bar); thread (PT standard, G or NPT to order); and bracket. This GFR300-10 arrives as 300 size, 3/8 in NPT, automatic drain, 5 um element, low-pressure type, round MPa gauge, reverse valve fitted and bracket included. Flow is published as curves rather than one rating, so ask us to check the curve against your demand before ordering.
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 curves, not a single rated figure, so we do not quote a number here. Send us your line pressure, downstream demand and port size and we will confirm the flow and the full datasheet figures for the GFR300-10 on request.
The L code makes this a low-pressure regulator variant rather than the standard type; the exact regulation range for the low-pressure version is not published, so we confirm it on request. Maximum inlet pressure is still 1.0 MPa (145 psi), and this code also carries the 5 um element, automatic drain, round MPa gauge, reverse valve and mounting bracket.
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.