The AirTAC GFR40015MLJF3WTK 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 GFR400 series combines water and particulate filtration with pressure regulation in a single body, so one unit both cleans the compressed air and sets its working pressure. This configuration GFR40015MLJF3WTK is the size 400 unit with a 1/2 in NPT port, a fine 5 um filter element (the 40 um standard element is available as the non-W version), a manual drain bowl in PC (polycarbonate), the low-pressure regulator type, an embedded square gauge reading in bar, and a reverse/check valve fitted. No mounting bracket is included on this variant. 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 family is published in sizes 200, 300, 400 and 600, with port options in PT (standard), G and NPT, drain choices of differential-pressure, automatic or manual, 40 um or 5 um filtration, standard or low-pressure regulation, gauge scale options, and bracket or no-bracket variants. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR40015MLJF3WTK 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 | 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. |
| 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. |
| 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) |
On a stamping or welding fixture line, this 1/2 in filter regulator cleans the plant air to 5 um and holds a steady low-pressure setting for the clamping cylinders, with the bar gauge giving the setter a direct readout at the manifold.
Feeding diverters, pushers and seal cylinders on a packaging conveyor, the unit strips water and fine particles before they reach the valves, while the low-pressure regulator type sets a gentle working pressure for delicate product handling.
On a laboratory or pilot-plant air skid where instruments need clean, low-pressure air, the 5 um element protects sensitive components and the manual drain suits a supervised environment where an operator checks the bowl daily.
Start with the port and size step: size 400 with a 1/2 in port suits lines plumbed at that bore, and the larger the size the greater the flow path - match it to your demand using the published flow curves rather than a single rating. This unit already carries the fine 5 um element (code W); if your application only needs coarse water and particulate removal, the 40 um standard element version is the alternative. The manual drain (code M) means someone must vent the bowl periodically, so it suits attended installations; automatic or differential-pressure drains are available if you cannot guarantee drain rounds. The low-pressure regulator type (code L) is for circuits that set pressures below the standard type's range - the exact adjustment range for this low-pressure variant is not published, so confirm it with us against your setpoint before ordering. Gauge is the embedded square type reading in bar; external round gauges and MPa/psi scales are options. Thread here is NPT (code T); PT is the catalogue standard and G is also orderable. This variant has no bracket (code J), so plan your own mounting.
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 SCFM or l/min number. Send us your line pressure, set pressure and air demand and we will confirm the sizing against the datasheet curves on request before you order.
The M in the code means the PC bowl is drained by hand, which suits installations where an operator is on site regularly. If the unit will run unattended, the same GFR400 size is available with an automatic drain (code A) or the default differential-pressure drain - just ask for the variant and we will confirm it.
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.