The AirTAC GFR300-15 AirTAC Filter Regulator, G1/2, 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 GFR300-15 is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air through a 5 um element (the finer of the two catalogue grades, code W) and regulates downstream pressure in a low-pressure configuration. This unit carries an automatic drain, so collected condensate is discharged without manual attention, and it is fitted with an embedded square gauge scaled in psi. A reverse/check valve is fitted, and the 300 size here is supplied with a G1/2 (BSPP) port and no mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8" to 1", drain choices (differential-pressure, automatic or manual), 40 um or 5 um filtration, gauge and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator, G1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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. 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". |
| A | Drain: Automatic 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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. |
| G | G (BSPP) 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) |
Supplies filtered, regulated air to clamp cylinders on a CNC fixture line, with the 5 um element protecting the clamping valves and the automatic drain keeping condensate off the circuit.
Feeds the diverter and pusher cylinders on a carton conveyor, holding a steady low set pressure so product handling stays gentle while the auto drain handles moisture at the drop point.
Conditions the supply to air knives and blow-off nozzles in a finishing cell, where the 5 um grade helps keep the delivered air clean and the psi gauge lets operators set the line pressure.
Size and port step up with flow demand: 200, 300, 400 and 600 cover ports from 1/8" to 1", so pick the step that matches your air consumption - this unit is the 300 size at G1/2. The 5 um element suits points where finer particulate removal matters; the 40 um standard grade remains available if general line protection is enough. The automatic drain here discharges condensate on its own, an advantage on lines that are not attended daily; manual and differential-pressure drains are the other catalogue options. The fitted square gauge reads in psi (MPa and bar scales are also offered), and the reverse/check valve holds downstream pressure if upstream supply is lost. PT is the standard thread; G 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 as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow data from the datasheet on request before you order.
The L code makes this a low-pressure type, intended where the working set point sits below what a standard regulator is aimed at; the exact range is not published, so we confirm it on request. The A code is the automatic drain, which discharges collected condensate from the PC bowl without manual intervention - useful on equipment that runs unattended.
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.