The AirTAC GFR40015MLNWTK 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 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 GFR40015MLNWTK is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is sized for 1/2 in NPT ports, carries a 5 um filter element (the finer of the two catalogue grades), and uses a manual drain, so the bowl is emptied by opening its drain valve during routine checks. It is the low-pressure type, is fitted with a reverse (check) valve, includes a mounting bracket, and no gauge is fitted in this version. The polycarbonate bowl lets you see accumulated condensate 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 PT, G or NPT thread, differential-pressure, automatic or manual drains, 40 um or 5 um filtration, standard or low-pressure regulation, gauge and check-valve options, and optional brackets. Rated flow is published as curves rather than a single figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40015MLNWTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
Feeds filtered, low-pressure regulated air to clamp cylinders on a milling or drilling fixture, with the 5 um element protecting the clamp valve seats and the check valve holding the circuit if supply pressure dips.
Mounted on the air drop feeding a carton-sealing or wrapping machine, it strips water and fine particles before the machine's valves and holds a steady low-pressure setting for gentle, consistent actuation.
Supplies regulated low-pressure air to blow-off nozzles and cleaning jets along a conveyor line, with the manual drain bowl emptied during scheduled washdown and maintenance rounds.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow your line needs; this unit is the size-400 body on 1/2 in NPT thread. Choose the drain to suit maintenance practice: manual (as here) is emptied by hand, automatic drains without attention, and the differential-pressure default drains when the pressure drop calls for it. Choose 40 um for general protection or 5 um, as fitted here, where finer particle removal matters. Gauge, scale (MPa/psi/bar), check valve and bracket are decodable options; PT is the standard thread and G or NPT are ordered options. Flow is published as curves, not a single rating, so 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. 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 line pressure and the flow your application needs and we will confirm the datasheet figures for this exact model on request.
Code M in this model specifies a manual drain: condensate collects in the polycarbonate bowl and is released by opening the drain valve during routine checks. If the unit will sit where nobody drains it regularly, the automatic-drain variant of the same GFR400 size is the better choice; the differential-pressure drain is the catalogue default.
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.