The AirTAC GFR30015MLJF3T AirTAC Filter Regulator NPT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 40 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 GFR30015MLJF3T is a GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This 300-size unit is built with 1/2 in NPT ports, a manual drain bowl in polycarbonate, a 40 um standard filter element, and an embedded square gauge reading in bar. It is the low-pressure type, intended for circuits that run at reduced working pressure, and it is supplied without a mounting bracket.
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 or manual drains, a 5 um element (code W), different gauge scales and G, NPT or PT threads. Flow for this series is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR30015MLJF3T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Placed ahead of an air-over-oil or cylinder-driven bench press, it removes water and pipe scale from the shop supply and lets the setter dial the reduced working pressure the press tooling was designed for, watching the bar-scale gauge.
On a cartoning or case-packing machine, the unit conditions the air feeding the valve island and actuator bank, catching condensate in the manual-drain bowl during shift checks and holding a steady low regulated pressure to the directional valves.
Loom and spinning-frame auxiliary circuits often run at modest pressures; this low-pressure-type filter regulator cleans the mill air supply and regulates it down for the jets and blowing nozzles, with the square gauge giving the operator a direct bar reading.
Start with the port step: this unit is 300 size with 1/2 in NPT ports, so check that your line size and expected air demand sit comfortably within the GFR300 flow curve - we can confirm the curve on request. Drain choice matters: this version has a manual drain, meaning an operator drains the bowl; if you cannot schedule that, an automatic-drain variant is available in the family. The 40 um element is the standard grade; specify the W code for the 5 um option if downstream valves or cylinders need finer filtration. The square gauge is fitted and reads in bar; external round gauges with MPa, psi or bar scales can be ordered instead. Thread is NPT here, with G (BSPP) and PT (the standard thread) available as order options. A mounting bracket can be added on variants that carry it - this one is supplied without.
One honest note on sizing: AirTAC publishes flow for this series as curves, not a single rated figure, so please ask us to confirm sizing against your application before ordering.
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 performance curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and air demand and we will confirm the datasheet curve for this 300-size, 1/2 in unit against your application before you order.
The M in the code sets a manual drain: condensate collected in the polycarbonate bowl is released by hand, which suits lines that are checked on a regular schedule. If nobody will drain the bowl routinely, choose an automatic-drain or differential-pressure-drain variant from the same GFR300 family instead.
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.