The AirTAC GFR300-15 AirTAC Filter Regulator, NPT 1/2 in, 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 differential-pressure 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 a single body. This 300-size unit is ordered with a 1/2 in NPT port, the 5 um filter element (code W) for finer filtration than the 40 um standard, the low-pressure regulator type, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a built-in reverse/check valve, and an embedded square pressure gauge scaled in MPa. A 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). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um or 5 um filtration, differential-pressure, automatic or manual drains, standard or low-pressure regulation, gauge scale options, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR300-15 AirTAC Filter Regulator, NPT 1/2 in, 5 um |
|---|---|
| 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 | 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 | Differential-pressure 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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) |
Clean, regulated air for the pick-and-place cylinders and sealing jaws on a cartoning or wrapping line, with the 5 um element protecting the directional valves that cycle thousands of times per shift.
A filtered, pressure-limited supply branch feeding solenoid valves and quarter-turn actuators on a process skid, where the reverse/check valve holds the set circuit against backflow.
Conditioned air for bench-mounted test rigs and laboratory fixtures that need fine filtration ahead of sensitive instruments, with the square MPa gauge giving a clear local pressure readout.
Size and port: the 300 size with a 1/2 in NPT port suits lines plumbed at 1/2 in; step up to 400 or 600 where the circuit demands more flow, or down to 200 for compact drops. Filtration: the 5 um element (code W) is the right choice when downstream valves, cylinders or instruments are sensitive to finer particles; the 40 um standard element suits general air prep. Drain: this unit uses the differential-pressure drain, which discharges condensate automatically in service; automatic (code A) and manual (code M) drains are orderable alternatives. Regulation: the L code makes this the low-pressure type - the exact regulation range for the low-pressure version is not published, so confirm it with us against your setpoint. Gauge: the embedded square gauge is fitted here with an MPa scale; psi or bar scales and an external round gauge are options. The reverse/check valve (code K) is fitted, and a mounting bracket is included. Thread: PT is the catalogue standard, with G and NPT as orderable options - this unit is ordered in NPT. Because flow is published as curves rather than 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 GFR series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your application and we will confirm the datasheet flow curve and help you check the 300 size against your demand before you order.
The W code fits the 5 um element instead of the 40 um standard, which is the right pick when downstream valves, cylinders or instruments need finer particle removal. The L code orders the low-pressure regulator type; its exact regulation range is not published, so confirm your setpoint with us. This unit also carries a differential-pressure drain, a reverse/check valve and an embedded square MPa gauge.
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.