The AirTAC GFR400C15ALF3TK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR400C15ALF3TK is a GFR-series filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This 400-size unit is built with 1/2 in NPT ports, an automatic drain that clears collected condensate without daily attention, a 40 um standard filter element, an embedded square gauge scaled in bar, and a reverse (check) valve that holds downstream pressure if the supply drops. It is the low-pressure type (code L), intended where the controlled pressure sits below the standard build's range, and it ships with the mounting bracket fitted. Maximum inlet pressure is 1.0 MPa (145 psi); working temperature is -5 to 70 C, non-freezing; the bowl on this 400 size is polycarbonate.
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, and choices of drain type (automatic, manual or differential-pressure), 40 um or 5 um filtration, gauge scale, thread (PT is the standard build; G and NPT are catalogue options) and bracket. Rated flow for this family is published as curves rather than a single figure, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR400C15ALF3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Filtered, regulated air for the grip and capper actuators on a bottling line: the automatic drain handles condensate from a humid compressor room while the check valve holds actuator position during brief supply dips.
Low-pressure regulation for the clamping cylinders on a CNC fixture, where the workpiece calls for a gentler holding pressure than a standard regulator is set up for, with the square bar gauge read at a glance by the operator.
Air supply for diverter gates and stop cylinders on a sorting conveyor, where the 40 um element protects the directional valves and the automatic drain keeps water out of the gate circuit.
Every letter of this code is a real choice. The 400 size with 1/2 in ports suits lines with higher air demand; step down to 300 or up to 600 if your demand differs. Drain: A is automatic (this unit), M is manual, blank is differential-pressure. Filtration: 40 um is standard; specify W for the 5 um element where downstream valves need finer air. Gauge: the embedded square gauge here is scaled in bar (F3); MPa and psi scales are available. Thread: T orders NPT as fitted here, PT is the standard build and G (BSPP) is also offered. The bracket is included (J would delete it) and K adds the reverse/check valve. As the low-pressure type, its regulation range differs from the standard build and is not published as a single figure - confirm it with us. Flow is published as curves, not a rated number, so send your demand 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 GFR family as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure and air demand and we will confirm sizing from the datasheet on request before you order.
The L code makes this a low-pressure variant of the GFR400, intended for controlled pressures below the standard build's range. Its exact regulation range is not published as a single figure, so we confirm it from the datasheet on request. The rest of the decode is standard for this unit: automatic drain, 40 um element, embedded square gauge in bar, NPT1/2 ports, check valve fitted and bracket included.
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.