The AirTAC GFR40010F2GK AirTAC Filter Regulator G3/8, 40 um 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 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 GFR400-10F2GK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This size 400 unit is supplied with a G3/8 port, a 40 um standard filter element, a differential-pressure drain in the PC bowl, an embedded square gauge scaled in psi, and a built-in reverse/check valve that holds downstream pressure when the upstream supply is lost. The mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range with this drain type is 0.15-0.9 MPa (20-130 psi), 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 port options from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, a 5 um (code W) filter element option, gauge scale choices, and G or NPT thread options to order. Flow is published by AirTAC as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR40010F2GK AirTAC Filter Regulator G3/8, 40 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (G (BSPP) 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 — 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. |
| (blank) | Mounting bracket included. |
| (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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
A filtered, regulated supply at a factory air drop feeding assorted pneumatic tools and actuators, with the check valve holding the set pressure if the main supply dips.
Conditioning and regulating air to conveyor stopper and pusher cylinders on a packaging line, where the 40 um element protects directional valves from water and debris.
Supplying clean, regulated air to quarter-turn pneumatic valve actuators on a process skid, with the psi gauge giving operators a direct local setpoint readout.
Size 400 with a G3/8 port suits lines where the required flow sits in the upper mid-range of the GFR family; step up to size 600 or down to 300 only after checking the flow curves against your demand. The differential-pressure drain bleeds accumulated condensate automatically whenever the pressure differential is high enough - no daily manual draining - while automatic (code A) and manual (code M) drains remain available in the same size. The 40 um element is the standard grade; specify the 5 um W option if downstream equipment needs finer filtration. The fitted square gauge reads in psi; round external gauges and MPa or bar scales are alternatives, and G or NPT threads can be ordered instead of the G thread here. A bracket is included with this configuration.
Because AirTAC publishes flow only as curves and not as a single rated number, we do not quote a flow figure here. Send us your application details and we will confirm the datasheet and correct sizing before you order.
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 series as curves, not as a single rated figure, so we do not state a flow number. Tell us your inlet pressure and required downstream flow and we will confirm the datasheet curve and check the sizing for your application on request.
K means a reverse/check valve is fitted, so downstream pressure is held if the upstream supply is interrupted. The drain in this configuration is differential-pressure type: condensate collected in the PC bowl is discharged automatically when the pressure differential across the drain is high enough, with no manual draining needed between elements.
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.