The AirTAC GFR400C15ALF3WTK AirTAC Filter Regulator NPT1/2, 5 um 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 GFR400C15ALF3WTK is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single size-400 body with a 1/2 in NPT port. This configuration carries the 5 um filter element (code W) for finer dirt and water-droplet capture than the standard 40 um grade, an automatic drain that expels collected condensate from the metal bowl without manual attention, and a reverse/check valve fitted. It is the low-pressure regulator type, and the embedded square gauge (bar scale) is fitted so the set pressure is visible at the unit.
This is a genuine AirTAC part from the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and thread options in PT, G (BSPP) and NPT. Drain, filter grade, gauge scale and regulator-type choices let you match the unit to the line. Flow is published by AirTAC as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR400C15ALF3WTK AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| 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) |
Feeding clean, regulated air to the cylinders and actuators on a carton-forming or wrapping line, where the 5 um element protects valve seats and the low-pressure type matches reduced set pressures.
Supplying the sortation gates, stops and pushers along a conveyor run, with the automatic drain keeping condensate out of the circuit on a line that runs unattended between shifts.
Conditioning shop air for a test bench or laboratory rig where fine 5 um filtration, a visible bar-scale gauge and a stable low-pressure setting are needed for repeatable results.
Size 400 with a 1/2 in port sits in the upper half of the GFR range; step up to size 600 or down to 300/200 depending on the flow your line needs - we will check the published flow curves against your demand before you order. The 5 um element (W) suits points where finer filtration matters; the standard grade is 40 um if your upstream air is already clean. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives in the family. This unit is the low-pressure regulator type, so if your circuit runs at reduced set pressures rather than standard ranges, confirm the exact regulation span with us. Thread here is NPT; PT is the catalogue standard and G (BSPP) is also orderable. A mounting bracket is included, and the square gauge reads in bar (MPa and psi scales are options).
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 series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Send us your line pressure, set pressure and air demand and we will confirm the sizing from the datasheet curves on request before you order.
The L code marks this as the low-pressure regulator type, intended for circuits set below the standard range; the exact regulation span for this variant is not in the published table, so confirm it with us. The A code is the automatic drain: the metal bowl purges collected condensate on its own, so there is no manual drain valve to attend.
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.