The AirTAC GFR40015ALC3WTK AirTAC Filter Regulator NPT1/2, 5 um is a genuine G-series filter regulator: water separation, 5 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 GFR40015ALC3WTK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate without manual attention, a low-pressure regulator type, an external round gauge reading in bar, a reverse/check valve fitted, and a mounting bracket included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um (W) filtration, gauge and scale options, standard or low-pressure regulation, PT (standard), G or NPT threads, and bracket options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40015ALC3WTK AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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 — round, 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
A low-pressure regulator type makes this unit a fit for clamping and holding circuits on assembly fixtures where workpieces must be gripped at reduced pressure rather than full line pressure, with the 5 um element protecting the clamp cylinders from particulate.
Packaging machines with solenoid valves and small actuator circuits benefit from filtered, regulated air at the machine drop. The automatic drain keeps condensate off the valve seats on lines that run unattended across shifts, and the bar gauge gives operators a visible setpoint.
On food, pharmaceutical or general process lines that use low-pressure air for gentle conveying, purging or blow-off, this filter regulator supplies clean, regulated air, with the reverse/check valve helping hold the downstream circuit if supply pressure is lost.
Start with the port and size step: this unit is size 400 with a 1/2 in NPT port; smaller or larger sizes (200/300/400/600) change the port and the flow capacity, so match the step to your line's air demand. Filter grade is a real choice: 40 um is the standard element and 5 um (code W, fitted here) suits points of use that need finer particulate removal. Drain type matters: differential-pressure (default), automatic (fitted here) or manual - automatic suits unattended installations. Gauge options are an embedded square gauge or an external round gauge, with MPa, psi or bar scales; this unit carries a round gauge reading in bar. Thread is PT as standard with G and NPT as order options; a bracket can be included or omitted (J).
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the datasheet and check the sizing against your required flow 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 flow for the GFR family as curves, not as a single rated figure, so we do not quote a flow number for this unit. Tell us your application and required flow and we will confirm the datasheet and check that the size 400 / 1/2 in port step suits your demand before you order.
'A' is the automatic drain: the bowl expels collected condensate on its own, which suits unattended installations (a blank would be the differential-pressure drain and 'M' would be manual). 'W' is the 5 um filter element, the finer of the two published grades (40 um is standard). This unit also carries L (low-pressure regulator type), C3 (external round gauge, bar scale), T (NPT thread) and K (reverse/check valve fitted).
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.