The AirTAC GFR400-10AJF1T AirTAC Filter Regulator NPT3/8 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 GFR400-10AJF1T is a GFR400 series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 400 size with a 3/8 in NPT port, an automatic drain that expels collected condensate without manual attention, the standard 40 um filter element, and the embedded square pressure gauge with MPa scale. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with this automatic-drain version, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C (non-freezing), and the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, an optional 5 um element (code W), optional external round gauge with MPa, psi or bar scales, and G (BSPP) or NPT thread alternatives to the PT standard. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-10AJF1T AirTAC Filter Regulator NPT3/8 Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT 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, MPa 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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) |
Clean, regulated air feeding the tool-change clamps and pneumatic actuators on a CNC machining centre, with the automatic drain handling condensate in a cabinet-mounted position that is not checked daily.
A filter regulator at the drop line feeding spray guns in a finishing booth, where water and particle removal ahead of the gun and a stable set pressure protect finish quality.
Conditioned air for the pick-and-place cylinders and sealing jaws on a carton packaging line, with the square MPa gauge giving operators a visible setpoint at the machine frame.
Sizing starts with the port step: this unit is the 400 size with a 3/8 in NPT port, one step above the 300 size 1/4 in and one below the 600 size 1/2 in, so match the size to the air demand of the circuit rather than to the existing pipe alone. Drain choice matters in practice: the automatic drain on this model suits unattended or hard-to-reach installations, while manual and differential-pressure drains are the alternatives in the range. The standard 40 um element covers general-purpose air preparation; specify the 5 um W-grade element if finer filtration is needed. The fitted square gauge reads in MPa; round external gauges with MPa, psi or bar scales are available as options. NPT thread is specified on this code; G (BSPP) and the PT standard are catalogue alternatives. No mounting bracket is included on this configuration (code J), so plan the installation point accordingly. Because flow is published as curves and not as 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. 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 GFR400 series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the relevant flow and datasheet figures on request before you order.
The A position in GFR400-10AJF1T is the drain code: A = automatic drain, which expels collected condensate from the bowl without manual attention. The alternatives in the family are M (manual drain) and no code (differential-pressure drain). With the automatic drain, the regulator adjustment range is 0.15-0.9 MPa (20-130 psi).
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.