The AirTAC GFR400C15AJC3TK AirTAC Filter Regulator NPT1/2, 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 GFR400C15AJC3TK is a size 400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in one body. This configuration is a 1/2 in NPT port unit with an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a fitted external round gauge reading in bar, and a built-in reverse (check) valve. No mounting bracket is supplied, and the polycarbonate bowl is standard at this size.
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, plus drain, filter-grade, gauge and thread options to match your line. Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR400C15AJC3TK AirTAC Filter Regulator NPT1/2, 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) |
Feeds clean, regulated air to the cylinders and grippers that run a carton-forming and sealing line, at a 1/2 in feed point, with the automatic drain keeping condensate out of the valve train.
Supplies impact wrenches and nutrunners at a workbench, holding outlet pressure steady from tool to tool so torque settings stay repeatable across the shift.
Regulates atomizing air to spray guns in a finishing booth, with the 40 um element and automatic drain protecting the finish from water carryover.
Step size and port to the job: sizes 200, 300, 400 and 600 cover 1/8 in to 1 in ports, so choose the size whose flow curve covers your consumption rather than defaulting to the largest. Drain choices are differential-pressure (default), automatic (this unit) or manual; automatic suits unattended installations. The filter element is 40 um standard or 5 um with code W. Gauges are an embedded square type as standard, with an external round gauge in MPa, psi or bar scales as the option (this unit: round, bar). Thread is PT as standard with G and NPT as order options, and brackets are optional. Flow is published as curves, not a single rating, so 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.
Flow for the GFR400 series is published as curves, not as a single rated figure, so we do not quote a number here. Send us your operating pressure and air consumption and we will confirm from the AirTAC datasheet whether this 1/2 in unit is correctly sized for the application.
A is the drain type: automatic, so condensate is expelled without manual attention. C3 specifies the external round gauge with a bar scale. K means a reverse (check) valve is fitted, which helps hold downstream pressure if the air supply is interrupted.
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.