The AirTAC GFR400-10 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This 400-size unit is built with a 3/8 in NPT port, a 5 um filter element for finer air cleaning than the standard 40 um grade, an automatic drain that ejects collected condensate without manual attention, an embedded square gauge reading in bar, and a reverse/check valve that holds downstream pressure when the supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi), the regulating range is 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 frame; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR series is offered in 200, 300, 400 and 600 sizes with 1/8 in to 1 in ports, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge scale options, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-10 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 — 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 0.15 - 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. |
| (blank) | Mounting bracket included. |
| (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) |
Feeding clean, regulated air to a pneumatic press or clamping station, where the 5 um element protects valve seals and the check valve holds the clamp pressure if the main supply drops.
Conditioning the air at individual tool stations on an assembly line, with the automatic drain keeping condensate out of the circuit on lines that run unattended between shifts.
Supplying steady, filtered air to packaging machinery actuators and cylinders, with the bar-reading square gauge giving operators a local setpoint check at the machine.
Choose the size and port step against the air demand of the circuit: the 400 frame with a 3/8 in NPT port sits mid-range in the GFR family between the 300 and the higher-flow 600. This unit carries the 5 um element (code W); select it where finer particulate removal matters, or order the 40 um standard grade where general-purpose cleaning is enough. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives. The square gauge here reads in bar, with MPa and psi scales available, and an external round gauge is optional. NPT is ordered as the thread option; PT is the catalogue standard and G (BSPP) is also offered. A mounting bracket is included. Because flow is published as curves and not a single rating, 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 GFR series as curves, not as a single rated number, so we do not quote a fixed l/min or SCFM figure. Tell us your application and we will confirm the flow data from the datasheet so you can size the unit correctly before ordering.
The automatic drain ejects collected condensate on its own as it accumulates, which suits installations that run unattended or sit in positions that are awkward to reach. If you prefer to control drainage yourself, the same GFR400-10 configuration can be ordered with a manual or differential-pressure drain instead.
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.