The AirTAC GFR40010AC2GK AirTAC Filter Regulator G3/8 Auto Drain 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 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 GFR40010AC2GK is a size-400 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration carries a G3/8 port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, a round pressure gauge reading in psi, and a built-in reverse/check valve. The standard regulator adjusts from 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The polycarbonate bowl suits the 400 size, and a mounting bracket is included.
This is a genuine AirTAC part in the GFR400 series, one of four sizes (200, 300, 400, 600) that step up in port size and flow capacity. Across the range you can order a 5 um element (code W), a manual or differential-pressure drain instead of automatic, gauge scales in MPa or bar as well as psi, and G or NPT threads as order options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR40010AC2GK AirTAC Filter Regulator G3/8 Auto Drain |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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". |
| 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). |
| C | Gauge shape: Round. 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) |
Clean, regulated air to a bench or floor pneumatic press: the 40 um element keeps debris out of the valve train while the regulator holds a steady working pressure for consistent forming and riveting strokes.
Feeding air cylinders and grippers on a carton or blister packaging line, where the automatic drain clears condensate between shifts and the check valve holds downstream pressure if supply dips.
A point-of-use drop on a machining-centre air ring main: the G3/8 port matches typical drop plumbing, the psi gauge gives operators a local setpoint readout, and the bracket fixes the unit to the machine frame.
Start with the port: the 400 size in 3/8 sits mid-range in the GFR ladder (200, 300, 400, 600), so step up or down depending on the air demand of the circuit downstream. Choose the drain to match access: automatic (this model) suits unmanned or hard-to-reach installations, manual suits attended stations, and differential-pressure drain is the default. The 40 um element is standard; specify the 5 um W option where finer particulate removal matters. Gauge scale is selectable (MPa, psi or bar) and this unit ships with a round psi gauge. Thread is G here; PT is standard and G/NPT are order options. A bracket is included. Because flow is published as curves rather than 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 this series as curves rather than a single rated figure, so no single number would be honest. Tell us your line pressure and the air demand of the equipment downstream, and we will confirm the sizing from the datasheet on request before you order.
The automatic drain expels condensate collected in the polycarbonate bowl on its own, with no operator action. Choose it for enclosed cabinets, rooftop or overhead drops, or any station that runs unattended; choose the manual-drain variant where an operator is always on hand to bleed the bowl.
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.