The AirTAC GFR400-10T AirTAC Filter Regulator NPT3/8 5um Auto Drain 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 AirTAC GFR400-10T is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 in NPT port, the fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and an external round gauge reading in bar. The regulator is the standard type 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 this size, and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um standard or 5 um fine filtration, differential-pressure, automatic or manual drains, gauge type and scale options, and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm sizing and datasheet details against your application before ordering.
| Model | GFR400-10T AirTAC Filter Regulator NPT3/8 5um Auto Drain |
|---|---|
| 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 | Fitted — round, bar 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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) |
Cleaning and regulating the supply to tool-clamp and part-clamp cylinders on a machining centre, where the 5 um element protects fine valve spools and the automatic drain keeps condensate out of the drop leg without daily attention.
Feeding regulated, filtered air to pneumatic nutrunners and clamping fixtures at assembly stations, with the bar gauge giving operators a local setpoint readout and the automatic drain suiting multi-shift running.
Supplying filtered, regulated air to stopper and diverter cylinders on a packaging conveyor line, where the single filter-regulator body saves panel space and the 5 um grade protects the directional valves driving the diverters.
Choose the size and port step against the air demand of the circuit: size 400 with a 3/8 in NPT port sits in the middle of the GFR range, and stepping up a size gives a larger port and more flow capacity. Drain type is a real operating choice: the automatic drain on this unit handles condensate removal unattended, while manual and differential-pressure drains are available on other codes. The 5 um element here is the finer option; the 40 um element is the standard grade if your application does not need fine filtration. Gauge options cover embedded square or external round styles with MPa, psi or bar scales - this code carries a round bar gauge. Thread is NPT on this unit; PT is the catalogue standard with G and NPT as order options, and a mounting bracket can be added on codes that carry it. Flow for this series is published as curves, not a single rated figure, so 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 rather than a single rated figure, so there is no one rated flow number we can quote. Tell us your application and required flow, and we will confirm sizing from the datasheet curves on request before you order.
The A in the code selects the automatic drain, which discharges collected condensate from the bowl without anyone opening it - useful on lines that run unattended. The W selects the 5 um fine filter element instead of the 40 um standard grade. This code also specifies the NPT thread (T), a round bar gauge (C3), and no mounting bracket (J).
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.