The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in NPT, 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This configuration is the 400 size with a 3/8 in NPT port, a manual-drain bowl in polycarbonate, a 5 um filter element (code W, against the 40 um standard), an embedded square gauge scaled in bar, and a built-in reverse/check valve that helps hold downstream pressure if the supply dips. It is supplied without a mounting bracket.
It is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, optional G (BSPP) or NPT threads, differential-pressure, automatic or manual drains, and 40 um or 5 um filtration. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figure for your application.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in NPT, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Conditioned air at the machine inlet for a machining centre: the 5 um element protects solenoid valves and actuator circuits, the regulator holds a steady setting, and the manual drain suits a shift-based maintenance routine.
Filtered, regulated air to carton-sealing cylinders and pick-and-place actuators on a packaging conveyor, with the check valve helping hold downstream pressure through brief supply dips.
Point-of-use conditioning on a laboratory compressed-air drop: the bar-scaled square gauge allows a precise local setting and the 5 um grade suits sensitive bench instruments and small pneumatic devices.
Size and port are the first choice: step up through 200, 300, 400 and 600 as your flow demand grows - this unit is the 400 body on a 3/8 in NPT port. Drain type matters: the manual drain here needs periodic opening, while the automatic and differential-pressure drain options suit unattended installations. Filter grade is 5 um on this unit (40 um is the standard alternative) - choose 5 um where downstream valves and cylinders need finer protection. The embedded square gauge is scaled in bar; MPa and psi scales and an external round gauge are options. PT is the standard thread, with G (BSPP) and NPT as order options - this unit is built NPT. A bracket is optional and this unit omits it. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 as curves rather than a single rated figure, so there is no one number we can honestly quote. Tell us your required flow and working pressure and we will confirm the datasheet figure for this 3/8 in NPT size on request.
This unit's bowl has a manual drain, so collected water is released by opening it periodically - a good fit where maintenance rounds are regular. Where the installation runs unattended, the automatic or differential-pressure drain options are the better choice. The 5 um element (code W) on this unit is finer than the 40 um standard.
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.