The AirTAC GFR400-10 AirTAC Filter Regulator G3/8, 5 um, psi Gauge 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 differential-pressure 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in a single body. This configuration is the 400 size with a G3/8 (3/8 in) port, the finer 5 um filtration grade (40 um is the standard element), a differential-pressure drain, an embedded square gauge reading in psi, and a built-in reverse/check valve. Mounting bracket included; the bowl is polycarbonate. Max inlet pressure is 1.0 MPa (145 psi), the regulating range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with ports from 1/8 to 1 inch, G (BSPP) or NPT thread alongside the PT standard, 40 um or 5 um filtration, automatic, manual or differential-pressure drains, and a choice of gauge scales. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10 AirTAC Filter Regulator G3/8, 5 um, psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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. |
| (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. |
| G | G (BSPP) 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 | GFR400 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding clean, regulated air to a machining centre's pneumatic valves and clamps: the 5 um element strips water and pipe-scale before they reach the tool-changer cylinders, the regulator holds a steady setting, and the check valve keeps the downstream circuit charged if the main supply dips.
Supplying carton sealers and wrapper cylinders on a packaging line: the filter stage keeps condensate and debris out of the valves, the regulator holds consistent cylinder pressure for repeatable case forming, and the differential-pressure drain sheds collected water without operator attention.
Conditioning the air line feeding spray guns in a finishing booth: the regulator lets the operator set and hold gun supply pressure, the 5 um element keeps water and particulate out of the air stream, and the check valve prevents backflow disturbances from upsetting the setting.
Step up through sizes 200, 300, 400 and 600 as your port and flow requirement grows; this 400 unit carries a 3/8 in port. Choose the drain: differential-pressure (as here, working from the pressure drop across the element), automatic for unattended condensate removal, or manual. Pick 40 um for general-purpose air or the 5 um W grade where finer filtration is needed. Gauge scale is MPa, psi or bar - this unit reads psi on an embedded square gauge, with an external round gauge optional. On thread, PT is the standard; G (BSPP) and NPT are order options, and this unit is G. The bracket is included; a J-code version omits it. Flow is published as curves, not a single rating, so have us 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 GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet on request.
The differential-pressure drain uses the pressure drop across the filter element to bleed off collected condensate, with no timer or operator effort. The same GFR family is also available with an automatic drain for unattended removal or a manual drain where you prefer to drain by hand; the manual-drain version also widens the regulating range down to 0.05 MPa.
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.