The AirTAC GFR40015MLF1TK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 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 GFR40015MLF1TK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 400 unit is ported 1/2 in NPT, carries a 40 um standard filter element, and has a manual drain bowl in PC (polycarbonate) - you open the drain valve by hand to expel collected condensate. The L in the code marks the low-pressure regulator type, intended for circuits that run below the range of a standard regulator; the exact set range for this variant is not published, so confirm it against your application before ordering. It ships with an embedded square MPa gauge, a reverse/check valve fitted, and a mounting bracket included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options including automatic, manual or differential-pressure drains, a 5 um element (code W), G or NPT thread in place of the PT standard, gauge scale in MPa, psi or bar, and a no-bracket build. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR40015MLF1TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, MPa 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". |
| 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Fixture clamps that hold workpieces during milling or drilling often run at reduced pressure. This low-pressure type filter regulator cleans the supply of water and chips-carried condensate and holds the clamp circuit at the set pressure, with the MPa gauge giving the operator a direct readout.
Carton sealers, case packers and wrap stations draw plant air through a single drop. A 1/2 in filter regulator at the drop removes water and particulate before the machine's valves and sets the supply pressure, while the manual drain lets maintenance bleed accumulated condensate during shift checks.
Spray booths and coating guns need clean, moisture-free air at a stable, often reduced pressure. This unit filters water and particulate from the drop feeding the booth and regulates the atomizing pressure, with the check valve fitted to hold the setting against supply-side backflow.
Start with the port step: size 400 at 1/2 in NPT suits lines where the required flow sits above what 3/8 in units serve; step up to size 600 for larger demand. Because flow is published as curves and not a single rating, ask us to confirm sizing against your air consumption before ordering. This unit has a manual drain, which is the right choice where someone walks the line and can bleed condensate on a schedule; choose automatic drain if the unit sits in an inaccessible spot. The 40 um element is the standard grade for general plant air; specify the W code for the 5 um element where downstream equipment needs finer filtration. The fitted square gauge reads in MPa; psi or bar scales and an external round gauge are orderable options. Thread here is NPT; G (BSPP) is the other catalogue option and PT is the AirTAC standard. A mounting bracket is included with this code.
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 series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and air consumption and we will confirm the correct size and pull the exact flow-curve and datasheet figures for you on request.
The M in the code means the PC bowl drains by hand: open the drain valve to expel condensate, which suits manned lines with routine checks; automatic and differential-pressure drains are available on other codes. The L marks the low-pressure regulator variant, used where the circuit runs below a standard regulator's range - its exact set range is not published, so confirm it with us before ordering.
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.