The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2, 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body, so a single 1/2 in unit conditions and controls the air feeding your equipment. This configuration carries the W fine filtration grade (5 um instead of the standard 40 um), an automatic drain that expels collected condensate without operator attention, a fitted reverse/check valve that holds downstream pressure when the supply is lost, and a round pressure gauge reading in psi. The polycarbonate bowl suits the 300 size, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) offered with port sizes from 1/8 to 1 in, PT, G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um filtration, and gauge choices. Flow figures are published as curves rather than a single rating, so we confirm the datasheet and sizing on request.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — round, psi 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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) |
Feeding a bench-mounted pneumatic press on a fabrication line: the 1/2 in port carries the supply to the press valve, the 5 um element protects the directional valve and cylinder seals from fine particulate, and the regulator sets the working pressure the forming job needs.
Conditioning the air feeding carton-sealing and wrapping heads on a packaging line: the automatic drain keeps condensate out of the machine without an operator stopping to drain a bowl mid-shift, and the check valve holds the set pressure through brief supply dips.
Supplying air cylinders and stopper actuators along a conveyor system: the regulator holds a steady pressure so positioning stays repeatable, the 5 um grade suits the fine-tolerance valve islands controlling the actuators, and the psi gauge lets maintenance read settings at a glance.
Size 300 with a 1/2 in PT port is the right step when your line's flow demand sits above what a 1/4 in unit can carry - match the size step to required flow and pipe diameter. The 5 um element (code W) is the choice for downstream components that need finer filtration than the standard 40 um element provides. The automatic drain suits unattended or hard-to-reach installations; choose manual if you prefer controlled, scheduled draining. The round psi gauge is an external option on top of the embedded square gauge, with MPa, psi or bar scales available, and the K code confirms a reverse/check valve is fitted. PT is the standard thread; G (BSPP) and NPT are order options. 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow data from the datasheet and check the sizing against your demand before you order.
The W code in GFR30015AC2WK selects the 5 um element instead of the 40 um standard, for finer protection of downstream valves and cylinders. The A code selects the automatic drain, which expels collected condensate on its own instead of relying on the default differential-pressure drain or scheduled manual draining.
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.