The AirTAC GFR400-10 AirTAC Filter Regulator 3/8in PT, Auto Drain, psi 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 body, so one 3/8 in (PT3/8) unit does both jobs in the size-400 flow path. This configuration has an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a fitted square pressure gauge reading in psi, and a built-in reverse (check) valve that holds downstream pressure when the upstream supply is lost. The polycarbonate bowl suits non-freezing installations from -5 to 70 C, and the maximum inlet pressure is 1.0 MPa (145 psi). The regulated outlet covers 0.15-0.9 MPa (20-130 psi).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, a 5 um (code W) element option, MPa/psi/bar gauge scales, G or NPT thread variants, and bracket options. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator 3/8in PT, Auto Drain, psi |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 | 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". |
| 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. |
| (blank) | PT 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) |
Feeding clean, regulated air to the pneumatic cylinders and grippers on a carton-forming and sealing line, with the automatic drain keeping condensate off the machine between shifts.
Supplying steady pressure to the directional valves and air cylinders that divert product between conveyor lanes, with the check valve holding the set pressure through upstream dips.
Conditioning shop air down to a stable, filtered supply for bench-mounted test rigs and sample-handling actuators, with the psi gauge giving a direct local pressure readout.
Start with the port step: size 400 carries a 3/8 in port, and moving up or down a size changes both the connection and the flow path, so match the size to the air demand of the circuit rather than to the pipe alone. For the drain, automatic (this unit) suits unattended or hard-to-reach installations; manual drain suits supervised points where you want to control discharge; the differential-pressure default drains only when the pressure differential calls for it. The 40 um element is the standard grade - choose the 5 um W option only where finer particulate protection is specified. The fitted square gauge here reads in psi; MPa and bar scales are available, and an external round gauge is an option.
Thread is PT as standard; G (BSPP) and NPT are catalogue options to order, so specify the variant your pipework needs. A bracket can be added where panel or wall fixing is required, and this code (J) specifies no bracket. Flow for GFR units is published as curves, not a single rated figure, so send us your application's air demand 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR performance as flow curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application's air demand and we will confirm the datasheet flow curves and sizing for the GFR400-10 on request.
The A in the code GFR40010AJF2K specifies an automatic drain, which discharges collected condensate without operator attention - useful for unattended or hard-to-access installations. The GFR family also offers manual drain and a differential-pressure drain as the default; pick automatic where the unit is not checked daily, and specify the option you need when ordering.
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.