The AirTAC GFR300-15 AirTAC Filter Regulator NPT1/2, 5 um, Auto Drain 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 automatic drain and regulates 0.15 - 0.9 MPa (20 - 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 a single 300-size body. This configuration is built for a 1/2 in NPT port, carries a 5 um filter element for finer air than the standard 40 um grade, and drains condensate automatically, so the bowl does not depend on someone opening a manual drain. The embedded square gauge reads in bar, the standard regulator covers 0.15-0.9 MPa (20-130 psi), a reverse/check valve is fitted, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR line runs from size 200 to 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and G (BSPP) or NPT thread options alongside the PT standard. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator NPT1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| 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 | GFR300 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds clean, regulated air to the tool-changing and clamping circuits of a machining centre, where the 5 um element protects fine spool valves and the automatic drain keeps condensate off the machine floor.
Sits upstream of the directional valves driving a carton-forming conveyor's pneumatic cylinders, holding a steady working pressure so pick-and-place and sealing strokes stay repeatable through the shift.
Installed at the drop point feeding an assembly cell's air tools and actuators, combining water and particle removal with pressure regulation in one body and draining itself automatically between shifts.
Start with the port and size step: this unit is size 300 with a 1/2 in NPT port, and the right size depends on the air demand of the line it feeds - go smaller for compact circuits, larger for higher demand, and let us check the published flow curves against your requirement before you commit. The 5 um element (code W) suits applications that need cleaner air than the standard 40 um grade; the automatic drain (code A) suits unattended or hard-to-reach installations, while manual and differential-pressure drains remain available in the family. The square gauge reads in bar; MPa and psi scales are the other catalogue options, and an external round gauge can be ordered. Thread is NPT here, with G (BSPP) available as an option; the bracket is included.
Because flow is published as curves and not a single rated figure, we do not quote a number here - send us your application details and we will confirm the datasheet figures before you order.
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, 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 flow figures for this 300-size, 1/2 in NPT unit before you order.
The code A in GFR30015AF3WTK specifies the automatic drain, which ejects collected condensate without manual attention - useful for unattended installations. The W specifies the 5 um filter element, one grade finer than the 40 um standard, for applications that need cleaner air. Both choices are catalogue options you can vary when ordering other GFR units.
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.