The AirTAC GFR30015MLJF3WT 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 GFR300 combines water and particulate filtration with pressure regulation in a single body, so one unit cleans the air and holds a set downstream pressure. This configuration is built for 1/2 in NPT ports, uses the fine 5 um filter element (code W), drains collected condensate by hand via the manual drain, and carries the low-pressure regulator type (code L) for circuits that run below standard plant pressure. The embedded square gauge is fitted with a bar scale, no mounting bracket is included, and no reverse/check valve is fitted.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the range you can order a 40 um standard element or the 5 um fine grade (W), differential-pressure, automatic or manual drains, square or external round gauges with MPa, psi or bar scales, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR30015MLJF3WT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 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 | GFR300 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Point-of-use conditioning for a carton sealer or case packer: the 5 um element keeps water and fines out of the machine's directional valves, while the low-pressure regulator holds the supply at the gentle pressure the packaging cylinders and vacuum generators are set up for.
Feeding a pneumatic clamp or hold-down circuit on a machining fixture where the clamps must see a reduced, stable pressure rather than full header pressure - the regulator sets it and the square bar gauge lets the setter verify it at a glance.
Conditioning the supply to stopper, pusher and diverter cylinders on a bottling or food line conveyor: filtered, regulated air at a controlled low pressure gives smooth gate action and protects the small control valves that sequence the line.
Start with the port step: size 300 with 1/2 in NPT ports suits lines plumbed at 1/2 in, but always match the size to the air demand of the circuit rather than the pipe alone, since flow is published as curves and not as one rated number. Choose the drain to suit attendance: manual drain (as here) needs someone to bleed the bowl, while automatic or differential-pressure drains suit unattended installations. This unit has the 5 um fine element (W) instead of the 40 um standard, which is the better choice upstream of precision valves and instruments. The square gauge reads in bar; MPa and psi scales and an external round gauge are alternatives. PT is the standard thread, with G and NPT as order options, and a bracket can be added if the code omits J.
Because the catalogue publishes flow as curves, ask us to confirm sizing against your actual air consumption before ordering - especially for this low-pressure (L) type, whose exact regulation range is not published and which we will confirm 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 GFR300 as curves, not as a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Tell us your application and required air consumption and we will confirm the flow data from the datasheet on request before you order.
L marks the low-pressure regulator type, intended for circuits that run below standard plant pressure; the exact regulation range for this type is not published, so we confirm it on request. M marks the manual drain: condensate collecting in the PC bowl is released by hand, which suits attended installations - automatic or differential-pressure drains are available for unattended ones.
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.