The AirTAC GFR40015MLF2WG AirTAC Filter Regulator G1/2 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400 series combines water and particulate filtration with pressure regulation in a single body. This GFR40015MLF2WG is the size 400 unit with a G1/2 port (G thread; PT is the standard, with G and NPT available as order options), the low-pressure regulator type, a 5 um filter element (code W, finer than the 40 um standard), a manual drain on the PC (polycarbonate) bowl, an embedded square gauge scaled in psi, and a mounting bracket included. In use, air passes through the 5 um element to drop out water and fine particulate, then through the low-pressure regulator, with the bowl emptied by hand as part of routine checks.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with differential-pressure, automatic or manual drains, 40 um or 5 um elements, square or round gauges in MPa, psi or bar scales, and PT, G or NPT threads. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow for this series is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application on request.
| Model | GFR40015MLF2WG AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| G | G (BSPP) 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 filtered, regulated air to a pneumatic press or clamping fixture, where the low-pressure regulator type serves circuits working at reduced settings and the 5 um element helps protect the downstream valve stack.
Conditioning the supply on laboratory rigs and test benches that need finer-than-standard filtration; the 5 um element and the psi-scaled square gauge let operators set and read the supply without converting units.
Filtering and regulating the air feeding cylinders and actuators on a packaging or conveyor line, with the manual drain emptied during scheduled line checks and the included bracket fixing the unit to the machine frame.
Size 400 with a 1/2 in port sits in the upper-middle of the GFR range; step down to size 300 or up to size 600 depending on the flow your line needs - we can confirm the flow curve for each size on request. This code carries the L option, making it the low-pressure regulator type; the exact adjustment range for the low-pressure type is not published, so confirm it with us before ordering rather than assume the standard range. The 5 um element (W) suits circuits needing finer filtration than the 40 um standard. The manual drain suits installations where the bowl is emptied by hand on a schedule; choose automatic or differential-pressure drain if nobody can drain it manually. The embedded square gauge reads in psi, with MPa and bar scales as alternatives and an external round gauge optional. Thread is G (BSPP); PT is the standard and NPT is available to order. A mounting bracket is included.
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 rather than a single rated figure, so we do not quote a number. Send us your application details and we will confirm the flow curve and correct sizing from the datasheet on request.
The M in the code specifies a manual drain: the PC bowl is emptied by hand, which suits installations where draining is part of a scheduled check. AirTAC offers the same size 400 filter regulator with automatic or differential-pressure drain - change the drain letter in the code - if the bowl cannot be drained manually.
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.