The AirTAC GFR400-10 AirTAC Filter Regulator, NPT 3/8 in, 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 size-400 filter regulator: water and particulate removal plus downstream pressure regulation combined in a single body. This configuration has 3/8 in NPT ports, a 5 um filter element (the fine option; 40 um is standard), an automatic drain that ejects collected condensate without manual attention, a standard regulator with a 0.15-0.9 MPa (20-130 psi) adjustment range, and an embedded square gauge reading in bar. No mounting bracket is fitted and no reverse/check valve is included.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, drain, filter-grade, gauge-scale, thread and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator, NPT 3/8 in, 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 | 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). |
| 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. |
| (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) |
Point-of-use conditioning at a machining centre: the 5 um element protects solenoid valves and actuators from water and fine particulate while the regulator holds a steady setting on the machine drop.
Conditioning the air feed to spray guns and atomising stations, where clean, dry air at a stable regulated pressure is required for consistent finish quality.
Feeding pneumatic cylinders and grippers on a packaging conveyor with filtered, regulated air, the automatic drain handling condensate on a line that runs unattended through shifts.
Size 400 with 3/8 in ports sits in the middle of the GFR range; step up to size 600 or down to 300/200 depending on the flow your line needs. Drain choice matters: automatic (this unit) suits unattended duty, manual drain suits supervised points, and the differential-pressure default drains on a pressure drop. The 5 um element here is the finer grade for sensitive downstream equipment; choose 40 um for general protection. The square gauge reads bar; MPa and psi scales are order options. Thread is NPT here; PT is the standard and G (BSPP) is an order option, and brackets can be added.
Flow for this family is published as curves, not a single rated number, so we do not quote a rated flow figure. Send us your application details 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. 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 family as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the flow data from the datasheet for this size-400, 3/8 in unit before you order.
The automatic drain ejects collected condensate on its own, so the bowl does not need manual draining on unattended or continuous-duty installations. On filtration, 40 um is the standard element; this unit carries the 5 um (code W) element for finer protection of sensitive downstream equipment.
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.