The AirTAC GFR40015MLJF3WT 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 AirTAC GFR40015MLJF3WT is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size-400 unit is specified with 1/2 in NPT ports, the 5 um filter element (code W) for finer filtration than the 40 um standard, a manual drain for controlled bowl purging, and the low-pressure regulator type for circuits that run below standard working pressures. The embedded square gauge is fitted with a bar scale, and the polycarbonate bowl lets you see accumulated condensate at a glance.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options including automatic, manual or differential-pressure drains, 40 um or 5 um elements, MPa, psi or bar gauge scales, PT, G or NPT threads, and bracket choices. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR40015MLJF3WT 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 | 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". |
| 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. |
| J | Supplied without bracket. |
| (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) |
On a machine section that runs at reduced air pressure, this low-pressure type filter regulator cleans the supply and holds the setpoint, with the bar-scale square gauge giving the operator a direct reading at the station.
Feeding cylinders and vacuum generators on a packaging conveyor line, the 5 um element protects fine-valve internals from particulate while the regulator sets a stable working pressure for consistent box forming and sealing.
As the conditioning stage on an OEM machine's air preparation panel, the single-body filter regulator saves panel space over separate units, and the manual drain suits installations where maintenance staff purge bowls on a schedule.
Choose the GFR size by the port and flow step your line needs: this unit is size 400 with 1/2 in NPT ports; smaller and larger sizes step down or up from there. Drain type is a real decision: manual drain (this code) means you purge the bowl yourself, while automatic and differential-pressure drains handle condensate without intervention. The 5 um element here suits finer filtration; the 40 um standard suits general protection. Gauge scale is bar on this unit, with MPa, psi and an external round gauge available. Thread is NPT on this code, with PT (standard) and G as order options; a mounting bracket can be added or omitted.
Because flow is published as curves and not a single rated figure, send us your application details and we will confirm sizing against the datasheet before you order. The exact regulation range of the low-pressure type is not published in the standard table; we will confirm it on request.
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 the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and datasheet figures for this size-400, 1/2 in unit on request before you order.
The M in the code specifies a manual drain: condensate collects in the polycarbonate bowl and is purged by hand. If you prefer unattended operation, the same unit can be ordered with an automatic drain or the differential-pressure drain, which is the series 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.