The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in PT, 5 um, psi gauge 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 differential-pressure 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in a single body. This configuration is built on the size-400 frame with a 3/8 in PT port, fitted with the fine 5 um filter element (code W), a differential-pressure drain, an embedded square gauge scaled in psi, and a reverse/check valve (code K). It is supplied without a mounting bracket (code J).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in and thread options PT (standard), G (BSPP) and NPT. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl has a differential-pressure drain. Rated flow is published as curves rather than a single figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in PT, 5 um, psi gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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 0.15 - 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". |
| (blank) | Drain: Differential-pressure 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). |
| F | Gauge shape: Square. 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. |
| (blank) | PT 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) |
On a machining cell, the 5 um element keeps water and grit out of the directional valves that actuate workholding clamps, while the regulator holds a steady clamp pressure at the setpoint and the check valve blocks backflow through the unit.
Diverter and reject gates on a packaging conveyor need clean, stable air to cycle reliably. This unit filters the supply to 5 um, regulates the line pressure for the gate cylinders, and the psi gauge lets operators verify the setting at a glance.
At a spray booth, the 5 um element helps keep moisture and particulate away from the atomizing valves and gun supply, and the regulator sets the atomizing pressure the painter dials in, with the square gauge giving a clear psi readout.
Choose the size by port and required flow: this size-400 unit carries a 3/8 in PT port, one step up from 1/4 in and one below 1/2 in. The 5 um element (W) suits air that feeds precision valves, instruments or spray equipment; the standard 40 um element is the general-purpose choice. Drain is differential-pressure here; automatic (A) and manual (M) drains are available in the family. The embedded square gauge is scaled in psi; MPa and bar scales and an external round gauge are options. G (BSPP) and NPT threads can be ordered in place of PT, and a mounting bracket can be added. Flow is published as curves, not a single rating, 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. 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 l/min or SCFM number we can honestly quote. Send us your application details and we will confirm the sizing from the datasheet flow curves on request, before you order.
The W in the model code fits a 5 um element in place of the standard 40 um. The finer grade suits air feeding precision valves, instruments or spray equipment; 40 um is the general-purpose choice for machine supply lines. Both grades are catalogue options across the GFR range.
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.