The AirTAC GFR300-15 AirTAC Filter Regulator, NPT 1/2 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 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. This configuration is the size 300 unit with a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in bar, and a reverse/check valve fitted. The polycarbonate bowl suits this size, a mounting bracket is included, and the regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options including manual or differential-pressure drains, a 5 um element (code W), MPa/psi/bar gauge scales, G or NPT threads in place of the PT standard, and low-pressure or no-bracket variants. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator, NPT 1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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. |
| (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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding the air cylinder of a bench or pneumatic press, where the 40 um element keeps scale and water out of the valve and cylinder and the regulator holds a steady setting for consistent forming force.
Supplying the tape-head and flap-tuck cylinders of a case sealer, where the automatic drain handles condensate during continuous shifts and the check valve holds the setting if upstream supply dips.
Conditioning shop air before it reaches tool-change actuators and air-blast nozzles, with the bar-scale square gauge giving the operator a local setpoint reference at the machine.
Start with the port and size step: the GFR300 carries a 1/2 in port, and stepping up to GFR400 or GFR600 gives larger ports and more flow capacity, while GFR200 suits smaller lines. Choose the drain to match the installation: automatic (this unit) suits unattended duty, manual drain suits supervised points, and the differential-pressure default drains on a pressure drop. Pick the 40 um standard element for general air preparation or the 5 um W option where finer filtration is needed. Gauge scale is selectable as MPa, psi or bar (this unit is bar, square embedded type; an external round gauge is optional). Thread is PT as standard with G and NPT as order options - this unit is NPT. A bracket is included; a J-code variant omits it. 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 GFR series as curves, not as a single rated figure, so we do not quote a number. Tell us your line pressure and the flow your application needs, and we will confirm against the datasheet curves whether the size 300, 1/2 in port unit is correctly sized before you order.
The A code fits an automatic drain, which expels collected condensate from the bowl without anyone opening it - useful where the unit is mounted high or runs unattended. On this automatically drained filter regulator the standard adjustment range is 0.15-0.9 MPa (20-130 psi); manually drained variants quote a wider lower limit. The bowl on this size 300 unit is polycarbonate.
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.