The AirTAC GFR300-15T 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 GFR300-15T is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with NPT1/2 ports, a fine 5 um filter element (code W), a manual drain bowl in polycarbonate, and a low-pressure regulator type for applications set below the standard range. A reverse/check valve is fitted, an embedded square MPa gauge is included for set-point visibility, and the mounting bracket is supplied. 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 spans sizes 200, 300, 400 and 600 with port sizes from 1/8" to 1", a choice of 40 um standard or 5 um fine filtration, differential-pressure, automatic or manual drains, gauge and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet figures for your application on request.
| Model | GFR300-15T 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, MPa 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
A 5 um filtered, low-pressure regulated supply keeps clamping cylinders on a machining fixture operating at a gentle, repeatable set point, with the square gauge letting the setter verify pressure at a glance.
On a carton-sealing or labelling conveyor, the unit filters line air to 5 um and holds the lower jet pressure the task needs, while the check valve holds the setting against momentary supply dips.
Bench-top analysers and pilot-scale pneumatic controls get clean, finely filtered air regulated to a low set point, with the manual drain allowing a technician to bleed the bowl during routine checks.
Size 300 with 1/2" ports suits lines whose air demand sits in the mid-range of the G-series; step up to size 400/600 or down to 200 by matching the port and flow curve to your consumption. The 5 um element (W) is the right choice where downstream valves, cylinders or instruments need finer filtration than the 40 um standard. The manual drain (M) means an operator opens the bowl drain during checks - choose automatic or differential-pressure drain if the unit is mounted where regular manual draining is impractical. The low-pressure regulator type is intended for set points below the standard range; we confirm the exact adjustment span on request. The fitted square gauge reads in MPa, with psi or bar scales and an external round gauge available as options. NPT thread is specified here; PT and G (BSPP) are orderable alternatives, and a bracket is included.
Because AirTAC publishes flow only as curves, 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 this family as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and air consumption and we will confirm the flow and sizing from the datasheet on request.
The M in the code specifies a manual drain: condensate is released by opening the bowl drain during inspection, which suits attended installations. Filtration here is the 5 um fine grade (code W); the standard element is 40 um, and either grade can be specified when ordering. The exact regulation span of this low-pressure type is confirmed on request.
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.