The AirTAC GFR400-10T AirTAC Filter Regulator NPT3/8 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 AirTAC GFR400-10T is a genuine AirTAC filter regulator: a single body that removes water and particulate from compressed air and regulates downstream pressure. This size 400 unit is configured with a 3/8 in NPT port, a 5 um filter element (the finer of the two catalogue grades), an automatic drain that ejects collected condensate without manual attention, and an external round gauge reading in psi. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi). The polycarbonate bowl suits the -5 to 70 C (non-freezing) operating range.
This unit belongs to the GFR400 series, one of four sizes (200/300/400/600) in the GFR filter-regulator family. Port sizes from 1/8 to 1 in, PT/G/NPT threads, manual or differential-pressure drains, a 40 um standard element, square or round gauges with MPa/psi/bar scales, and bracket options are all available across the range. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10T AirTAC Filter Regulator NPT3/8 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 | Fitted — round, 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 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) |
Clean, regulated air feeding pneumatic clamps and tool-change cylinders on a machining centre, where the 5 um element protects close-tolerance valves from water and fine particulate.
A conditioning point ahead of diverters, sealers and stopper cylinders on a packaging conveyor, with the automatic drain handling condensate on lines that run unattended through shifts.
Filtering and regulating shop air delivered to spray guns and air-assisted applicators, where the 5 um grade and a stable set pressure help the finish and keep the gun air clean.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up or down (200/300/400/600) to match the pipe size and flow demand of your circuit. This unit carries the 5 um element (code W) - choose it where downstream equipment needs finer filtration than the 40 um standard, or specify the 40 um grade to reduce element loading on dirtier lines. The automatic drain (code A) suits unattended duty; manual and differential-pressure drains are the alternatives. The round psi gauge is fitted here; embedded square gauges and MPa/bar scales are the other catalogue options. Thread is NPT (code T); PT and G (BSPP) are order options, with PT as the standard. A bracket is not included with this code (J), and no reverse/check valve is fitted.
Because flow is published as curves rather than a single rated figure, we do not quote a flow number here. 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 GFR400 series as curves, not as a single rated number, so we do not state a flow figure here. Tell us your application and we will confirm the datasheet flow curves and check the sizing for you before you order.
The A in the code GFR40010AJC2WT specifies an automatic drain, which discharges collected condensate from the bowl without operator attention - useful on unattended or high-humidity lines. The catalogue also offers a manual drain and a differential-pressure drain; those are separate order codes on the same GFR400 family.
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.