The AirTAC AirTAC GFR400-10AF1T 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 GFR400-10AF1T is a size 400 filter regulator that removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a 3/8 in NPT port, an automatic drain that discharges collected condensate without manual attention, a 40 um standard filter element, and a built-in square pressure gauge scaled in MPa. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), and the polycarbonate bowl suits non-freezing duty from -5 to 70 C.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options including a 5 um element (code W), manual or differential-pressure drain, external round gauge with MPa/psi/bar scales, a reverse/check valve, and G or NPT threads in place of 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.
| Model | AirTAC GFR400-10AF1T 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. |
| (blank) | Mounting bracket included. |
| (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) |
Feeds filtered, regulated air to a CNC machine's pneumatic tool-change and clamping circuits, with the automatic drain handling condensate so the prep unit does not need daily attention.
Prepares the air feeding cylinder-driven carton-forming and sealing heads on a packaging line, holding a stable set pressure while the 40 um element stops pipe-scale reaching the valves.
Sits upstream of quarter-turn pneumatic valve actuators in a process panel, giving the panel builder one body that both cleans the air and sets the actuator operating pressure.
Start with the port step: size 400 carries the 3/8 in port, and moving up or down a size changes both the port and the flow capacity, so match the size to the air demand of the circuit rather than the pipe alone. Drain type is a real choice here: automatic drain suits unattended or hard-to-reach installations, manual drain suits supervised points, and differential-pressure drain is the catalogue default. The 40 um element is standard; choose the 5 um W option where finer particulate removal is needed. Gauge scale (MPa, psi or bar) and PT versus G/NPT thread are ordered to specification, and a mounting bracket is included.
Flow for this series is published as curves, not a single rated number, so we do not quote a rated flow figure. Send us your application details and we will confirm sizing against the datasheet curves 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 rated flow number for this unit. Tell us your application's air demand and we will confirm the sizing against the datasheet curves on request before you order.
This model's A code specifies an automatic drain, which discharges collected condensate from the bowl without anyone opening it. It suits installations that run unattended or sit in awkward positions; manual and differential-pressure drain versions are available in the same series if you prefer a supervised drain point.
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.