The AirTAC GFR400C10AF3WT AirTAC Filter Regulator 3/8 in NPT is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet 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 GFR400C10AF3WT 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 tapped 3/8 in NPT, carries the 5 um filter element (code W) instead of the standard 40 um, and drains collected condensate automatically, so it suits lines that run unattended. The standard regulator covers a setting range of 0.15-0.9 MPa (20-130 psi), an embedded square gauge scaled in bar is fitted, and a mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi), the polycarbonate bowl suits the full pressure rating, and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and each size can be ordered with manual, automatic or differential-pressure draining, a 40 um or 5 um element, an embedded square gauge or an optional external round gauge scaled in MPa, psi or bar, and G or NPT threads as options alongside the PT standard. Flow is published as curves rather than a single rating, so send us your application and we will confirm the figures from the datasheet on request.
| Model | GFR400C10AF3WT AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 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 — factory standard, Factory standard 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. |
|---|---|
| C1 | Port size See datasheet. 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Dropping a GFR400 filter regulator into the air drop feeding a CNC machine's pallet-clamping and tool-change actuators keeps moisture and fine particles out of the valves while holding a steady pressure setting for the clamps.
On a packaging line, conditioning the air feeding the case-erector and sealing cylinders prevents water carryover into the machine, and the automatic drain clears condensate through each shift without an operator opening the bowl.
Feeding spray guns and air-assisted applicators in an automotive paint booth: the 5 um element catches fine particulate, the automatic drain clears collected water, and the regulator holds the gun supply at its set point.
Within GFR400 the real choices are port size, drain type, filter grade, gauge scale and thread. Stepping from 300 to 400 (or on to 600) buys a larger port and greater flow capacity, so size the unit against the air demand of the machine it feeds. This unit already carries the automatic drain and the 5 um element; the 40 um standard element and the manual or differential-pressure drains remain available on the same size if your maintenance routine suits them. The square gauge can be rescaled to MPa, psi or bar, and G or NPT threads can be ordered where PT is not the plant standard. Because AirTAC publishes flow as curves rather than a single rated 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.
AirTAC publishes GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your line pressure, downstream demand and port requirements and we will confirm the sizing from the datasheet on request.
The automatic drain expels collected condensate without anyone opening the bowl, which suits unmanned or lightly attended cells. Manual and differential-pressure drains remain available on the same 400 size if you prefer to drain on a schedule, and the element can be ordered as the standard 40 um instead of this 5 um version.
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.