The AirTAC GFR40015ALF2WTK AirTAC Filter Regulator NPT1/2 5um 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 GFR40015ALF2WTK is an AirTAC GFR400 filter regulator: it removes water and particulate from compressed air and holds downstream pressure, in a single body. This configuration is the size 400 unit with a 1/2 in NPT port, a 5 um filter element (code W; 40 um is the standard grade), an automatic drain, the low-pressure regulator type, an embedded square gauge reading in psi, and a reverse/check valve fitted. A 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 bowl on this size is PC (polycarbonate).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and catalogue options include manual or differential-pressure drains, 40 um or 5 um filtration, MPa, psi or bar gauge scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures against your application.
| Model | GFR40015ALF2WTK AirTAC Filter Regulator NPT1/2 5um |
|---|---|
| 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 — 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. |
| 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) |
On a CNC cell where pneumatic clamps and workholding fixtures run at reduced set pressures, this low-pressure type filter regulator conditions the supply and holds the clamp circuit steady, with the check valve maintaining pressure if the main supply drops.
Carton formers, case sealers and labeler cylinders on a packaging conveyor run continuously through humid plant air; the 5 um element and automatic drain keep water and particulate out of the valves and cylinders without an operator stopping to drain the bowl.
Benchtop analyzers and pilot-scale process rigs fed from a house air ring main need clean air at a reduced, stable pressure; this unit filters to 5 um and regulates down to the level the instrument requires, with the psi gauge giving a direct local reading.
Size 400 with a 1/2 in port sits in the upper half of the GFR range; step up or down through sizes 200 to 600 as your line volume demands. This unit carries the W code for 5 um filtration - choose it where downstream equipment needs finer conditioning than the 40 um standard grade, and note the trade-off is a tighter element to keep clean. The A code means an automatic drain, the right choice where the unit is mounted in a position that is awkward to reach for manual draining. The low-pressure regulator type is intended for circuits that run at reduced set pressures; the exact range for this type is not published, so confirm your set pressure with us. The square gauge reads in psi, with MPa or bar scales available as alternatives, and a reverse/check valve is fitted to hold downstream pressure if the supply is interrupted. Thread here is NPT; PT is the standard and G (BSPP) is also an order option.
Flow for the GFR400 is published as curves, not a single rating, so we cannot quote one number here. Send us your required flow and working pressure and we will confirm 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 flow for the GFR400 as curves rather than a single rated figure, so we do not quote a number on the page. Send us your required flow and working pressure and we will confirm from the datasheet whether this size and port suit your application before you order.
The A in this model code means an automatic drain, which discharges collected condensate from the PC bowl without anyone having to open it - useful where the unit sits in an awkward or unattended spot. Manual and differential-pressure drains are catalogue alternatives on the GFR family if your mounting position or maintenance routine suits them better.
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.