The AirTAC GFR400C10AC2K AirTAC Filter Regulator PT3/8, 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 AirTAC GFR400C10AC2K is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration carries a PT3/8 (3/8 in) port with PT thread, an automatic drain that expels collected condensate without manual attention, the standard 40 um filter element, a round pressure gauge reading in psi, a built-in reverse/check valve, and a mounting bracket. The standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl suits this size class.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is available with manual or differential-pressure drains, a 5 um (W) element, square or round gauges in MPa, psi or bar scales, and G or NPT threads as order options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400C10AC2K AirTAC Filter Regulator PT3/8, 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) |
Point-of-use conditioning on the air feed to a CNC machining centre: the 40 um element catches water and swarf-carried particulate before it reaches solenoid valves, while the regulator holds a steady set pressure to the machine's pneumatic actuators and the check valve holds the circuit against backflow.
Mounted at the drop feeding a cartoning or case-packing conveyor's air cylinders. The automatic drain keeps condensate out of the bowl on a line that runs unattended across shifts, and the psi gauge lets maintenance verify set pressure at a glance.
Conditioning the air feed to a spray booth or coating line, where the filter stage strips water and pipe-scale ahead of the regulator that sets atomising and actuation pressure. The check valve prevents downstream backflow into the drop when the supply is shut off.
Size 400 with a PT3/8 port sits in the middle of the GFR range; step up to size 600 or down to 300/200 if your line porting or required flow differs. Choose the automatic drain (this unit) where the bowl is mounted in a hard-to-reach spot or the compressor runs unattended; manual drain suits attended installations, and differential-pressure drain is the catalogue default. This unit carries the standard 40 um element - order the W variant if the application needs 5 um filtration. The round gauge here reads psi; square embedded gauges and MPa or bar scales are alternatives. PT thread is standard on this code, with G (BSPP) and NPT available to order, and the bracket is included. Because flow is published as curves rather than one rated figure, 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 G-series flow as curves, not as a single rated number, so we do not quote a l/min, m3/h or SCFM figure. Tell us your application and line conditions and we will confirm the flow and sizing from the datasheet on request before you order.
The A in the code specifies an automatic drain, which discharges collected condensate by itself - useful where the unit is mounted out of reach or the system runs unattended. The same GFR400 series is also available with a manual drain or the differential-pressure drain (the catalogue default), and the filter element can be specified as 5 um with the W code instead of this unit's standard 40 um.
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.