The AirTAC GFR400C10AC2GK 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 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 GFR400C10AC2GK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the size 400 unit with a 3/8 in port in G (BSPP) thread, an automatic drain that ejects collected condensate without manual attention, the standard 40 um filter element, a fitted round gauge reading in psi, a built-in reverse/check valve that holds downstream pressure when the supply is lost, and the included mounting bracket. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with this automatic drain, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, a 5 um element option (code W), gauge scale in MPa, psi or bar, G or NPT thread alternatives, and low-pressure or check-valve variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR400C10AC2GK AirTAC Filter Regulator G3/8, Auto Drain |
|---|---|
| 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) |
Installed on the 3/8 in air feed to a workshop pneumatic press, it strips water and swarf from the plant air line and holds a steady regulated pressure to the press valve, with the check valve holding the circuit if the main supply drops.
Mounted at the drop into a packaging or cartoning machine, it conditions the air feeding cylinders and grippers, the automatic drain coping with condensate on a line that runs unattended through shifts.
Fitted at a fleet maintenance bay where impact wrenches and tyre cages run off a shop compressor, it delivers clean, regulated air at a psi reading the technicians can check at a glance on the round gauge.
Size 400 with a 3/8 in G port suits lines whose pipe run and air demand sit in that band; step up to size 600 or down to size 300 if your flow curve lands near a boundary. The automatic drain on this unit suits unattended or hard-to-reach installations; choose manual drain where you want positive control over blowdown, or the differential-pressure default where a drop signal should trigger draining. The standard 40 um element is right for general plant air; specify the 5 um W option only where downstream equipment demands finer filtration. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. G (BSPP) thread is the coded option here - PT is the standard thread and NPT is also orderable - and the bracket is included. Because flow is published as curves rather than a single rating, 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 GFR400 as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the air demand of your equipment and we will confirm the flow and sizing from the datasheet on request.
The A in the code selects the automatic drain, which ejects collected condensate from the bowl without manual blowdown - useful on unattended lines. The trailing K means a reverse/check valve is fitted, holding downstream pressure if the upstream supply is interrupted. With this automatic drain the regulator adjustment range is 0.15-0.9 MPa (20-130 psi).
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.