The AirTAC GFR40015MLJC3WT 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 GFR40015MLJC3WT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This size 400 unit is built for a 1/2 in NPT port, carries the 5 um filter element (code W) for finer filtration than the 40 um standard, and drains by hand through its manual drain. It is the low-pressure regulator type, and a round gauge with a bar scale is fitted so the set pressure can be read directly. The polycarbonate bowl suits the -5 to 70 C non-freezing operating range, and maximum inlet pressure is 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, offered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, embedded square or external round gauges in MPa, psi or bar scales, PT, G or NPT threads, and bracket or no-bracket mounting. Rated flow for this model is published as a curve rather than a single figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR40015MLJC3WT 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 — round, 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). |
| C | Gauge shape: Round. 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) |
Feeds filtered, regulated air to pneumatic clamp cylinders on a carton sealing or case packing station, where the low-pressure type lets the line run clamping at reduced set pressure and the bar gauge keeps the setting visible to the operator.
Supplies cleaned, pressure-controlled air to spray guns or atomising nozzles in a paint or coating booth, where the 5 um element limits particulate carryover into the finish and the manual drain is emptied during the shift-end check.
Powers the pusher and divert cylinders on a conveyor sorting line, filtering water and pipe scale out of the shop air ahead of the valves and holding a stable low supply pressure so the divert timing stays repeatable.
Size and port step up together: 200, 300, 400 and 600 cover 1/8 in to 1 in ports, so match the port to your line and let the published flow curves settle the size. The real choices on this family are the drain (manual, automatic or differential-pressure), the element (40 um standard or 5 um with W), the gauge (embedded square as standard, external round optional, in MPa, psi or bar scales), the thread (PT standard, with G and NPT as order options) and the bracket (included by default, omitted with J). This unit is the low-pressure type; its exact regulation range is not published in the catalogue, so confirm it with us before ordering. Because flow is published as curves rather than a single rating, ask us to check sizing against your application.
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 there is no one l/min or SCFM number we can quote for this model. Send us your line pressure, port size and air demand and we will confirm the flow from the datasheet curve and check the sizing for your application before you order.
W is the filter grade: this unit carries the 5 um element instead of the 40 um standard, for finer removal of particulate and water carryover. M is the drain: the bowl is drained by hand, which suits attended maintenance routines. If you prefer the bowl to clear itself, the same size is available with an automatic or differential-pressure drain - just ask for the alternative code.
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.