The AirTAC GFR300-15 AirTAC Filter Regulator NPT1/2, 5 um 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a 1/2 in NPT port, fitted with a 5 um filter element (finer than the 40 um standard), a manual drain on the polycarbonate bowl, a low-pressure regulator type, an embedded square gauge scaled in bar, and a reverse (check) valve. No mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with a choice of port, thread (PT standard; G and NPT as options), drain type, filter grade, gauge scale and low-pressure or standard regulator type. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| 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 | 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 | 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. 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. |
| 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) |
On automated valve-actuation manifolds that hold actuators at reduced pressure, this filter regulator cleans the supply, regulates it with the low-pressure type, and the check valve helps hold the downstream setting.
On cartoning and wrapping lines with 1/2 in air drops, the 5 um element protects cylinder and valve seals from water and fine particles while the regulator sets the machine circuit pressure.
On test benches where instruments need clean, steadily regulated air at low pressure, the 5 um grade, bar-scaled gauge and manual drain give an operator direct control of the supply condition.
Choose the size and port step against the air demand of the circuit: this is the 300 size with a 1/2 in NPT thread (PT is the standard thread; G and NPT are ordered options). This unit carries the 5 um element (code W) where finer filtration than the 40 um standard is needed, and the manual drain suits installations where an operator can bleed the bowl routinely; automatic and differential-pressure drains are available on other variants. The low-pressure regulator type is selected where the circuit works below the standard range - the exact adjustment range for the low-pressure type is not published, so confirm it with us. The gauge here is the embedded square type scaled in bar (MPa and psi scales exist), and the reverse valve holds the downstream side against backflow. Because flow is published as curves and not a single rating, 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 curves, not as a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Tell us your application and we will confirm the flow and datasheet figures for this exact configuration on request before you order.
The code M sets a manual drain, meaning an operator drains the polycarbonate bowl by hand at intervals; automatic and differential-pressure drain versions exist if you prefer unattended drainage. The code W sets the 5 um element, one step finer than the 40 um standard, for circuits that need cleaner air.
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.