The AirTAC GFR300-10 NPT 3/8 AirTAC Filter Regulator 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 regulates downstream pressure in a single body. This configuration is sized for a 3/8 in NPT port, carries the W-coded 5 um filter element for finer filtration than the standard 40 um grade, and has an automatic drain that ejects collected condensate without manual attention. The pressure setting range is 0.15-0.9 MPa (20-130 psi), read on the fitted embedded square gauge scaled in MPa, and the polycarbonate bowl suits the 300 frame. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. No mounting bracket is included with the J-coded build.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, standard or low-pressure regulation, optional gauge scales in MPa, psi or bar, and G, NPT or PT threads. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR300-10 NPT 3/8 AirTAC Filter Regulator 5 um 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, MPa 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. 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. |
| 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. |
| (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) |
Feeding pneumatic clamps and tool-change cylinders on a CNC machining centre: the 5 um element keeps fine particulate out of precision actuator seals while the regulator holds a steady setting for consistent clamping force, and the automatic drain keeps condensate off the machine floor.
Supplying the flap-fold and tape-head cylinders on a carton-sealing conveyor: filtered, regulated air at a stable setting keeps stroke behaviour repeatable through a shift, and the automatic drain handles moisture build-up without an operator visiting the station.
Conditioning the supply to lab automation and sample-handling pneumatics: the 5 um grade suits the cleaner air these mechanisms expect, the square MPa gauge gives a clear local pressure reference, and regulation in the same body saves panel space at the bench.
Step through the real choices before ordering: pick the size and port (200 through 600, 1/8 to 1 inch) against the pipe diameter your machine presents - this unit is the 300 frame with a 3/8 in NPT port. Choose the drain: automatic (this unit, code A) for unattended condensate removal, manual where you want operator-controlled blowing down, or the differential-pressure default. Choose the element: 40 um standard or 5 um with the W code, as fitted here, for finer protection of downstream components. Select the gauge scale (MPa, psi or bar) and whether you want the embedded square gauge or the optional external round gauge. Confirm the thread - PT is the standard, with G (BSPP) and NPT as orderable options - and whether a bracket is needed, since the J code on this unit means none is supplied. Flow for the GFR series is published as curves, not a single rated figure, so send us your application details and we will confirm sizing against the datasheet before you order.
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 GFR-series flow as performance curves rather than a single rated figure, so we do not quote one number. Tell us your application and line pressure and we will confirm the flow and sizing from the datasheet on request before you order.
The W code in GFR30010AJF1WT selects the optional 5 um element, which filters more finely than the 40 um standard grade. Choose 5 um where downstream valves, cylinders or instruments need cleaner air; the 40 um grade remains available on other GFR300 variants if coarser, longer-life filtration is preferred.
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.