The AirTAC GFR400-15ALF2TK 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 PT1/2" 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 GFR400-15ALF2TK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit has a 1/2 in NPT port, an automatic drain that ejects collected condensate without manual attention, and a 40 um standard filter element. The regulator is the low-pressure type, a square pressure gauge scaled in psi is fitted, and a reverse/check valve is included; the unit is supplied with its mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the polycarbonate (PC) bowl suits this size.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options for thread (PT standard, G or NPT), drain type, 5 um filtration (code W), gauge scale (MPa, psi or bar) and reverse valve. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR400-15ALF2TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 15 | Port size PT1/2". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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. |
| T | NPT 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Air-prep point for clamping cylinders and fixtures that hold workpieces during a press or fastening cycle, where the low-pressure regulator type suits circuits set below standard line pressure.
Feeds the air cylinders and actuators on a carton-forming or wrapping conveyor, with the automatic drain clearing condensate from the bowl so the line keeps running without manual draining rounds.
Point-of-use conditioning ahead of welder clamp and positioner actuators in a robotic cell, filtering water and scale from the shop air main and holding a steady regulated supply at the 1/2 in NPT connection.
Size and port step up together: GFR sizes 200, 300, 400 and 600 cover 1/8 in to 1 in ports, so match the 400 size and its 1/2 in NPT port to the flow your line needs. Where a bowl is fitted you choose differential-pressure (default), automatic (this unit) or manual drain, and filtration is 40 um standard or 5 um with code W. Regulated units carry a gauge - the embedded square gauge is standard with an external round gauge optional - in MPa, psi or bar scales, and low-pressure (L) types are available where the circuit runs below standard pressures. Thread is PT as standard with G and NPT as order options, and a bracket is included unless code J omits it. Because flow is published as curves rather than a single 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves rather than a single rated figure, so no one number covers every operating point. Tell us your line pressure, set pressure and the equipment you are feeding, and we will confirm the sizing against the datasheet on request before you order.
The bowl that collects water and particles can be drained three ways: differential-pressure (the default), automatic (code A, as on this unit) or manual (code M). Automatic drainage ejects collected condensate on its own, which suits units mounted in awkward spots or on lines that cannot be shut down for draining; manual drainage gives full operator control. This unit is fitted with the automatic drain.
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.