The AirTAC GFR400-10T AirTAC Filter Regulator, NPT 3/8 in, 5 um is a genuine G-series filter regulator: water separation, 5 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 GFR400-10T is an AirTAC GFR-series filter regulator: a single body that removes water and particulate from compressed air and then regulates downstream pressure. This size-400 unit has 3/8 in NPT ports, a 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and the standard regulator with an adjustment range of 0.15-0.9 MPa (20-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size, and no gauge, bracket or reverse/check valve is fitted in this configuration.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of 40 um standard or 5 um (W) filtration, and differential-pressure, automatic or manual drains. Flow is published as curves rather than a single rated figure, so we confirm datasheet and flow figures for your application on request.
| Model | GFR400-10T AirTAC Filter Regulator, NPT 3/8 in, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Conditioning the shop-air feed to a CNC machine's pneumatic circuits: the 5 um element keeps chips-laden, wet compressed air out of solenoid valves and tool-change cylinders, while the regulator holds a steady set pressure for clamping and actuation.
Feeding the diverters, stoppers and pusher cylinders on a packaging conveyor line. The automatic drain handles condensate through continuous shifts, and the regulator keeps actuator pressure consistent as line demand fluctuates.
Supplying filtered, regulated air to the grippers and clamps of a robotic welding cell. Clean, dry air at a stable set pressure supports repeatable part clamping, and the 3/8 in NPT ports suit the cell's air drop.
Size and port are the first choice: the 400 size with 3/8 in NPT ports sits mid-range in the GFR line, and the right step depends on the flow your line needs. Drain type is the next decision: the automatic drain on this unit suits unattended duty, while manual and differential-pressure drains are available if you prefer controlled or load-dependent purging. Filtration is 5 um here (code W) against the 40 um standard element - choose the finer grade where downstream valves and instruments need cleaner air. A gauge is not fitted (code N); gauge options and scales can be selected on other variants. NPT is the thread on this unit; PT (standard) and G are the other order options, and a bracket can be added where mounting support is required.
Because AirTAC publishes flow as curves rather than a single rated number, 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
The A in the code selects the automatic drain, which expels collected condensate by itself instead of waiting for a manual purge - useful on lines that run unattended. The W code selects the optional 5 um element instead of the 40 um standard, giving finer particulate removal for downstream valves and instruments.
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.