The AirTAC GFR40015LF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure 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 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 AirTAC GFR40015LF3WT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point, in one body. This 400-size unit carries a 1/2 inch NPT thread, is the low-pressure type, and is fitted with the finer 5 um filter element (code W) instead of the 40 um standard. Condensate is handled by a differential-pressure drain, the embedded square gauge is scaled in bar, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with ports from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, and 40 um or 5 um filtration. Maximum working (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 200/300/400 sizes. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR40015LF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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. |
| (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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Feeding pneumatic clamps and workholding fixtures on a machining centre, where clean, dry air at a steady low set point protects the clamp cylinders and position switches between cycles.
Supplying the filler and capper air legs on a beverage line, where the 5 um element keeps mist and scale out of the diverters and the regulator holds the set point the machine was tuned to.
Air preparation for conveyor divert gates and stoppers in a parcel hub, where the differential-pressure drain clears condensate during long shifts and the gauge lets staff verify the line setting at a glance.
Size and port step up together: 200 through 600, with this unit at 400 on a 1/2 inch NPT thread (PT is the standard thread; G and NPT are order options). Choose the low-pressure type where the circuit sets below the standard regulator range - the exact range for the low-pressure version is not published, so confirm it with us. The 5 um element (W) gives finer filtration than the 40 um standard where downstream valves and cylinders need cleaner air. Drain here is differential-pressure, which passes condensate as the pressure drop across the element builds; automatic and manual drains are the alternatives in the family. The embedded square gauge is scaled in bar, with MPa and psi scales and an external round gauge available as options. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 this series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and the air demand of the equipment downstream, and we will confirm the sizing from the datasheet before you order.
The W code fits the finer 5 um element, which suits circuits feeding sensitive valves, cylinders or instruments that suffer from finer particulate. The 40 um element is the standard grade on the GFR400 and is the usual choice for general plant air. Both grades are available on this size with the same differential-pressure 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.