The AirTAC GFR400-10G AirTAC Filter Regulator, G3/8, Auto Drain 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 GFR400-10G is a filter regulator: one body that removes water and particulate from compressed air and sets downstream pressure, so a single unit handles two air-preparation jobs. This configuration is the size 400 series with a G3/8 (BSPP) port, an automatic drain that expels collected condensate without manual attention, the standard 40 um filter element, an embedded square gauge reading in psi, and a standard-type regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range. The bowl is polycarbonate, and no mounting bracket or reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options including manual or differential-pressure drains, a 5 um element (code W), alternative gauge scales in MPa or bar, and NPT or PT threads in place of the G thread fitted here. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10G AirTAC Filter Regulator, G3/8, Auto Drain |
|---|---|
| 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 | 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, psi 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.
| 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)). |
| (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. |
| 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. |
| (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 | GFR400 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding filtered, regulated air to a bench or floor pneumatic press, where the automatic drain keeps condensate out of the cylinder and valve stack without an operator stopping to bleed the bowl.
Conditioning the air supply to conveyor diverters, clamp cylinders and bagging heads on a packaging line, with the psi gauge giving operators a local setpoint readout at the machine.
Dropping in filtered, regulated air at a 3/8 in take-off on a plant distribution header, supplying multiple downstream tools or sub-boards from one conditioning point.
Start with the port and size step: this unit is size 400 with a G3/8 port, one step up from the 1/4 in size 300, so step up only if your line's flow demand calls for it. The automatic drain on this unit suits unattended or hard-to-reach installations; choose manual drain where you prefer controlled, scheduled blowdown, or the default differential-pressure drain where a pressure drop can trigger purging. The standard 40 um element covers general air preparation; specify the 5 um W-grade element for finer protection. The fitted square gauge reads in psi, and MPa or bar scales are available. Thread is G (BSPP) here, with PT as the standard and NPT orderable. No bracket is fitted on this unit, so plan your mounting accordingly. Flow is published as curves, not a single rating, so 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for this series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and line conditions and we will confirm the relevant datasheet flow figures on request before you order.
This configuration carries drain code A, an automatic drain that discharges collected condensate from the bowl without manual attention. The GFR series is also available with a manual drain or the default differential-pressure drain, and the standard filter element is 40 um with a finer 5 um element (code W) as an option.
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.