The AirTAC GFR400-10 AirTAC Filter Regulator G3/8 Auto Drain psi Gauge is a genuine G-series filter regulator: water separation, 40 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 400-size body with a G3/8 (BSPP) port. This configuration carries the standard 40 um filter element and an automatic drain, so collected condensate is discharged without manual attention. It is the low-pressure regulator type, fitted with an external round gauge scaled in psi, and includes a reverse (check) valve. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits this size; only the 600 size uses an aluminium alloy bowl.
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 drain, 40 um or 5 um (W) filtration, standard or low-pressure regulation, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator G3/8 Auto Drain psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 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, 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. 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.
| 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". |
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
On a machining-cell fixture that clamps workpieces with air actuators running at reduced pressure, the GFR400-10 filters the supply and holds the lower regulated setting, with the psi gauge giving the operator a direct readout at the cell.
On a cartoning or wrapping line where multiple valve islands and cylinders share one 3/8-inch air drop, this filter regulator cleans the supply, keeps condensate out of the valves via the automatic drain, and protects the downstream components with its check valve.
At an assembly bench fed from a main ring main, the GFR400-10 conditions the branch supply - removing water and pipe scale at 40 um and regulating the bench pressure - while the automatic drain handles condensate without daily attention from maintenance staff.
Size and port: the 400 size with a G3/8 port sits in the middle of the GFR range; step up or down (200 to 600) according to the flow your line needs, and confirm the match against the published flow curves before ordering. Drain: automatic (code A) empties the bowl by itself, which suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other configurations. Filter grade: 40 um is standard for general plant air; choose the 5 um (W) element where downstream valves and cylinders need finer protection. Gauge: this unit has an external round gauge scaled in psi; embedded square gauges and MPa or bar scales are options. Thread: G (BSPP) here, with PT and NPT orderable. Bracket: not included with this code (J). Regulation: this is the low-pressure type; its exact range is not published, so confirm it with us against your setpoint. Flow is published as curves, not 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
In this code the A sets the automatic drain, which discharges collected condensate from the bowl without manual intervention - useful where the unit is mounted out of easy reach. C2 sets the external round gauge scaled in psi; an embedded square gauge and MPa or bar scales are available on other configurations.
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.