The AirTAC AirTAC GFR30015MJF3WT Filter Regulator 1/2 NPT 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 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in one compact body. This unit is the 300 size with a 1/2 in NPT port, a polycarbonate bowl with manual drain, a 5 um filter element, and an embedded square pressure gauge reading in bar. The manual drain means an operator opens the bowl drain by hand to release collected condensate, which suits air lines that are inspected on a regular schedule.
This is a genuine AirTAC part. The G-series filter regulator range spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT as the standard thread and G or NPT to order, drain choices of differential-pressure, automatic or manual, and 40 um or 5 um elements. Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range on this manual-drain version is 0.05-0.9 MPa (7-130 psi), and working temperature is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application.
| Model | AirTAC GFR30015MJF3WT Filter Regulator 1/2 NPT |
|---|---|
| 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 | Standard 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 130 psi). 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)). |
| (blank) | Standard 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 at assembly stations: filtered and regulated air feeding impact wrenches, pneumatic clamps and air ratchets on a car-body trim line, with the 5 um element protecting the tools from water and fine debris.
Supplying clean, steady-pressure air to the tool changer, clamping fixtures and air-blast nozzles on a CNC lathe or machining centre, where pressure drift or moisture carry-over upsets part finish and cycle consistency.
Conditioning the air that drives carton sealers, bagging heads and diverters on a packaging conveyor, keeping actuator speed consistent by holding regulator set pressure despite demand swings along the line.
The real choices in this family are the size and port step, the drain type, the filter grade and the thread. Size 300 with a 1/2 in NPT port sits mid-range in the 200/300/400/600 series; step up or down according to the air demand of your line. Drain options are differential-pressure (the default), automatic or manual - this unit is manual, so plan a routine drain check into maintenance. The element here is 5 um (code W) against the 40 um standard; choose 5 um where downstream valves and cylinders need finer protection. The gauge scale on this unit is bar; MPa and psi scales are available, and an external round gauge can be specified instead of the embedded square one. Thread is NPT here; PT is the standard and G (BSPP) is also offered. A mounting bracket is optional - this configuration is ordered without one. Flow is published as curves, not a single rating, so 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 this series as curves rather than a single rated figure, so we do not quote a number here. Send us your application details - required downstream pressure and the air demand of the equipment you are feeding - and we will confirm the sizing from the AirTAC datasheet on request before you order.
It means an operator opens the bowl drain by hand to release the water the filter has collected, so the unit should sit somewhere reachable on a scheduled maintenance walk. If your line runs unattended or the unit is hard to reach, the same GFR300 is available with an automatic drain or the differential-pressure default - ask us to quote that configuration.
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.