The AirTAC GFR300-10T AirTAC Filter Regulator 3/8in NPT 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 GFR300-10T is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is fitted with 5 um filtration (the finer W grade), an automatic drain that ejects collected condensate without manual attention, an embedded square gauge reading in bar, and a reverse (check) valve. It connects via a 3/8 in NPT port and handles a maximum inlet pressure of 1.0 MPa (145 psi) at temperatures from -5 to 70 C, non-freezing. The polycarbonate bowl suits this size, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600, with port options, manual or differential-pressure drains, 40 um or 5 um filtration, gauge choices and thread variants available across the series. Flow is published by AirTAC as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-10T AirTAC Filter Regulator 3/8in NPT 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 | 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 — square, bar 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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) |
Clean, regulated air feeding the tool-change clamps and pneumatic cylinders on a machining centre, where the 5 um element protects fine-valve pilot circuits from water and swarf-laden condensate.
Pressure regulation for the stopper, pusher and lift cylinders on a bottling or carton conveyor, with the automatic drain keeping the bowl clear across multi-shift running without operator attention.
A point-of-use filter regulator on individual drop lines in a weaving or spinning plant, where the check valve holds downstream settings and the bar gauge lets operators verify set pressure at a glance.
Choose the 300 size with its 3/8 in port when your line sits in the mid-flow band of the GFR range; step up to 400 or 600 for larger air demand and down to 200 for compact circuits. This unit already carries the finer 5 um element (W code) - specify the standard 40 um grade instead if your actuators and valves do not need the tighter filtration. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives in the series. The square gauge here reads in bar, with MPa and psi scales offered on other variants, and an external round gauge is optional. PT is the standard thread; G (BSPP) and NPT are order options, as this NPT version shows. No mounting bracket is fitted on this code (J), though brackets are available. Because AirTAC publishes flow only as curves and not as a single rating, ask us to confirm sizing against your application 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 GFR300 series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Tell us your inlet pressure and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code GFR30010AJF3WTK selects the automatic drain, which discharges collected condensate by itself instead of relying on manual draining - useful for unattended installations. The W selects the optional 5 um filtration grade instead of the 40 um standard element. Both are catalogue options on the GFR300; the 40 um grade with a manual or differential-pressure drain is available if you prefer.
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.