The AirTAC GFR40015MLF2WT AirTAC Filter Regulator NPT1/2, 5 um 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 GFR40015MLF2WT is an AirTAC GFR400 filter regulator: a 5 um filter element and a pressure regulator combined in one body, size 400 with a 1/2 in NPT port. This configuration is the low-pressure regulator type with a manual drain, the 5 um (W-grade) element in place of the standard 40 um, and an embedded square gauge scaled in psi. The polycarbonate bowl lets you see accumulated condensate, and the 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).
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and with a choice of drain type, filter grade, gauge scale and PT, G or NPT thread. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application before ordering.
| Model | GFR40015MLF2WT AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| 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 | 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. |
| 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) |
Set a reduced, stable supply to paint spray guns and air-assisted applicators where the job calls for lower set pressures than a standard regulator targets; the 5 um element keeps the finish free of water and fine particles.
Feed carton-sealing and case-packing cylinders on a packaging line: the filter section strips water and 5 um particles before the regulator section sets the working pressure for consistent stroke behaviour.
Point-of-use conditioning on a laboratory or pilot-plant air header, where a compact filter regulator with a psi gauge gives technicians a visible set point and clean, dry air to bench equipment.
Size and port are the first decision: step up from 200 through 600 as flow demand and pipe size grow; this unit is size 400 with a 1/2 in NPT port. Drain type matters in practice: manual drain (fitted here) means an operator opens the bowl drain, while automatic and differential-pressure drains discharge condensate without attention. Filter grade is 5 um on this model (code W) against the 40 um standard - choose the finer grade where downstream valves and cylinders need cleaner air. The gauge is the embedded square type scaled in psi; an external round gauge and MPa or bar scales are options. Thread is NPT on this model; PT is the standard and G (BSPP) is an order option. A mounting bracket is included. This is the low-pressure regulator type; its set-pressure range is not published in the standard table, so ask us to confirm the range for your set point. 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and sizing from the datasheet on request.
This model carries the M drain code: condensate collects in the polycarbonate bowl and an operator opens the drain to release it. If you prefer unattended discharge, the same size is available with automatic or differential-pressure drains - ask us to confirm the variant.
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.