The AirTAC GFR400-10 AirTAC Filter Regulator 3/8in PT 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This size 400 unit carries a 3/8 inch PT port, a 40 um filtration element, and an automatic drain that expels collected condensate without manual attention, so the bowl keeps clearing itself while the line runs. The fitted square gauge reads outlet pressure in psi, and the standard regulator adjusts across 0.15-0.9 MPa (20-130 psi). 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, and no mounting bracket is included with this configuration.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including manual or differential-pressure drains, a 5 um element (code W), alternative gauge scales in MPa or bar, an external round gauge, G or NPT threads, and a mounting bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator 3/8in PT Auto Drain |
|---|---|
| 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 | 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. |
| (blank) | PT 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 a pneumatic press or clamping fixture, this unit dries and cleans the supply air and holds the working pressure the tooling was set up for, with the automatic drain keeping condensate out of the cylinder in an unattended cell.
On a packaging line's air drop, the 40 um element stops pipe scale and water from reaching valves and actuators, while the regulator pins the supply pressure that the machine's sequence valves were specified around.
Supplying positioners, transducers and air-operated control components, this unit gives a stable, readable setpoint on the square psi gauge, with the automatic drain protecting the panel from moisture carryover between service visits.
Start with the port and size: this unit steps up to 3/8 inch PT in the size 400 body, the right choice when your line's flow demand sits above what a 1/4 inch unit carries comfortably. Choose the drain to match access: automatic (this unit) suits installations that are hard to reach or run unattended; manual suits attended lines where an operator drains on a schedule; differential-pressure drains automatically only when the element loading justifies it. The 40 um element is the standard grade for general plant air; specify the 5 um W-code element where downstream equipment needs finer filtration. Gauge scale is selectable (MPa, psi or bar) and an external round gauge is available as an option. Thread is PT as standard, with G (BSPP) and NPT as order options, and a bracket can be added if this one is omitted.
Because flow for this family is published as curves and not as a single rated figure, we do not quote a flow number here. Send us your application's flow and pressure requirements 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 flow for the GFR series as curves, not as a single rated figure, so we do not state a flow number here. Tell us your required flow and working pressure and we will confirm the sizing from the datasheet on request before you order.
The A in the code GFR40010AJF2 selects the automatic drain, which expels collected condensate on its own - useful where the unit is mounted out of reach. The catalogue alternatives are manual drain (code M) and the default differential-pressure drain; the 40 um element is standard on this unit and a 5 um element is available as code W.
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.