The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, 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 steady, both jobs done in one body. This configuration is the 400 size with a PT3/8 port, a 5 um filter element (code W), the differential-pressure drain that is the family default, and an external round gauge reading in psi. The standard regulator covers a set range of 0.15-0.9 MPa (20-130 psi) against a 1.0 MPa (145 psi) maximum inlet, and the polycarbonate bowl suits non-freezing compressed air from -5 to 70 C. No mounting bracket is fitted on this J-coded unit.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and the catalogue options include 40 um or 5 um filtration, manual, automatic or differential-pressure drains, embedded square or external round gauges in MPa, psi or bar scales, a reverse/check valve, and G (BSPP) or NPT threads in place of the PT standard. Rated flow is published only as curves rather than a single number, so ask us to confirm sizing and the full datasheet figures for your application.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, 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 — 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". |
| (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). |
| 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. |
| (blank) | PT 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 ahead of the directional valve stack on a machining centre: the 5 um element keeps moisture and particulate out of the valves while the regulator holds a steady set pressure for clamps and tool changers.
A filter regulator feeding the cylinder bank on a carton-forming or case-packing conveyor, so actuation stays repeatable shift after shift and the fine element protects the solenoid valves from dirt carried in the shop air.
Filtered, pressure-stabilised air to spray guns and air-assist nozzles on a paint line, where the 5 um grade helps keep particulate out of the finish and the local psi gauge lets operators set and check gun pressure at the station.
Match the size and port to the air your line actually consumes: this 400-size unit carries a 3/8 in PT port, one step above 1/4 in and one below 1/2 in. Filtration here is the finer 5 um element (code W); the standard grade is 40 um, so choose 5 um where downstream valves and instruments want cleaner air. The drain is differential-pressure by default, with automatic (A) and manual (M) drains as orderable alternatives. The gauge on this code is the external round type reading psi; the embedded square gauge and MPa or bar scales are the other catalogue choices. Thread is PT as standard, with G (BSPP) and NPT available to order, and this J-coded unit is configured without a mounting bracket. Because rated flow is published as curves and not a single figure, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
Flow for this family is published as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your working pressure and the air your equipment consumes, and we will confirm the sizing and the full datasheet figures on request.
W is the 5 um filter element (40 um is the standard grade), C2 is the external round gauge reading in psi, and J means no mounting bracket is fitted. The drain is the differential-pressure type, the regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) set range, and the thread is PT, with G (BSPP) and NPT available as order options.
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.