The AirTAC GFR40015ALF3TK 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 GFR40015ALF3TK is a size 400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a 1/2 in NPT port. This configuration carries the automatic drain, so collected condensate is expelled without manual attention; the 40 um standard filter element handles everyday compressed-air cleanliness. It is the low-pressure regulator type, and the embedded square gauge is fitted with a bar scale for direct setting and monitoring. A reverse/check valve is fitted, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 400 size (aluminium alloy bowls are used on the 600 size).
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 ordered with choices of drain type, filter grade (40 um standard, 5 um optional), gauge scale (MPa, psi or bar), thread (PT standard, G and NPT as options) and bracket. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR40015ALF3TK 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, bar 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. |
| 3 | Gauge scale: bar. 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) |
Feeds clamp cylinders on a welding or assembly fixture where the actuation pressure is set below the standard regulator band; the low-pressure type regulator holds the setting while the 40 um element keeps debris out of the clamp valves.
Mounted on the machine frame with the included bracket, it filters and regulates the supply to a packaging machine's cylinder and valve bank, with the automatic drain clearing condensate during continuous shifts and the bar-scale square gauge giving operators a visible setpoint.
Installed at a 1/2 in plant air drop serving a process station that runs at reduced pressure; the reverse/check valve holds downstream pressure if the upstream supply dips, and the polycarbonate bowl with automatic drain suits a station checked only at intervals.
Start with the port step: this unit is size 400 with a 1/2 in NPT port, one of the larger steps in the GFR range (200/300/400/600), so match it to the line size and the air demand of the machine it feeds. Because flow is published as curves and not as a single rated figure, ask us to confirm sizing against your application before ordering. Drain type is a real choice: this unit has the automatic drain (code A), which suits unattended or hard-to-reach installations; manual and differential-pressure drains are available on other configurations. Filter grade here is the 40 um standard element; specify the W code where a 5 um element is needed. The gauge on this unit is the embedded square type with a bar scale; MPa and psi scales and an external round gauge are alternatives. Thread is NPT on this configuration (PT is the standard; G is also an order option), and the bracket is included.
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 flow for the GFR400 series as curves rather than a single rated figure, so there is no one rated-flow number we can honestly quote. Tell us your line pressure and the air demand of the equipment, and we will confirm the sizing from the datasheet on request before you order.
This configuration carries code A, the automatic drain: condensate collected in the polycarbonate bowl is expelled without anyone opening it, which suits unattended or hard-to-reach mounting. Manual (code M) and differential-pressure (blank) drains are available on other GFR400 configurations if you prefer a different 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.