The AirTAC AirTAC GFR400-15MLJC1WTK Filter Regulator NPT1/2 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 1/2 in (NPT1/2) connection handles both jobs. This unit is built with a 5 um filter element for finer dirt and condensate capture, a manual drain you operate by hand to empty the polycarbonate bowl, and a low-pressure regulator type for circuits that run below standard pressure ranges. It ships configured with a round external gauge scaled in MPa and a reverse/check valve fitted, and no mounting bracket.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, plus options for drain type, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT threads, and brackets. Flow figures are published as curves rather than a single rating, so contact us and we will confirm the datasheet figures for your application.
| Model | AirTAC GFR400-15MLJC1WTK Filter Regulator NPT1/2 |
|---|---|
| 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 — round, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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, regulated low-pressure air to the tool-change and clamping circuits of a machining centre, with the 5 um element protecting precision spools from fine particulate.
Sits at the drop point of a bottling or cartoning conveyor, conditioning the air that drives sorting and diverting cylinders, with the manual drain emptied during scheduled changeovers.
Conditions branch lines on a plant air ring main for looms and winding heads, where the reverse/check valve keeps downstream pressure stable if an upstream section is isolated.
Size 400 with a 1/2 in port suits lines where higher flow demand justifies stepping up from the 300 frame; match the frame to your flow curve, not a single rated number. Choose the 5 um element (code W) where downstream valves and cylinders need finer protection than the 40 um standard; the manual drain suits stations an operator visits routinely, while automatic or differential-pressure drains suit unattended installs. The fitted round MPa gauge reads outlet pressure at a glance, and the reverse/check valve holds downstream settings if upstream supply dips. NPT threading is the order option here; PT is the catalogue standard and G (BSPP) is also available, so pick the thread your piping actually uses. No bracket is fitted with this code, so plan your mounting accordingly. Before ordering, ask us to confirm sizing against the flow curves in the datasheet.
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 this series as curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your application details and we will confirm the relevant datasheet figures and check the sizing against your demand before you order.
The W in the code specifies the 5 um element, one grade finer than the 40 um standard, for better protection of downstream components. The M specifies a manual drain, meaning the polycarbonate bowl is emptied by hand rather than automatically, which suits stations that are checked on a regular schedule.
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.