The AirTAC AirTAC GFR300-15 Filter Regulator NPT1/2 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 AirTAC GFR300-15 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration is built on the 300 size with a 1/2 in NPT port, a 5 um filter element (the finer W grade, against the 40 um standard), an automatic drain that clears collected condensate without manual attention, and the low-pressure regulator type. A square pressure gauge scaled in bar is fitted, a reverse/check valve is built in, and 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. The bowl on this 300 size is polycarbonate.
This is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with ports from 1/8 in to 1 in, PT, G or NPT threads, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, gauge and bracket options, and standard or low-pressure regulator types. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and any other datasheet value for your application.
| Model | AirTAC GFR300-15 Filter Regulator NPT1/2 5 um Auto Drain |
|---|---|
| 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 | 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. 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. |
| 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) |
Feeding spray guns in an automotive refinish booth: the 5 um element strips water and particles that ruin finish quality, while the low-pressure regulator holds a gentle, steady setting at the gun.
Cleaning and regulating air to pneumatic clamps on a machining cell, where the built-in check valve supports the set circuit and the automatic drain keeps condensate out of the fixtures.
Supplying cylinders and blow-off nozzles on a carton-sealing conveyor, with the fitted bar gauge giving operators a readable setpoint at the line side.
The real, decodable choices are: size and port (200/300/400/600; 1/8 in to 1 in) stepped against the air your line needs; drain type - automatic on this unit, against manual or differential-pressure; filter grade - 5 um here, against the 40 um standard; gauge scale (MPa, psi or bar - this unit carries bar); thread - PT is the standard, with G and NPT as order options; bracket; and standard versus low-pressure regulator type. The regulation range of the low-pressure type is not published as a single figure, so we confirm it on request. Flow is published as curves, not a rated number: send us your application and we will confirm sizing against the datasheet before you order.
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 G-series flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and sizing from the datasheet on request.
This unit carries drain code A: an automatic drain that expels collected condensate without anyone opening the bowl. Manual and differential-pressure drains are the other catalogue choices across the GFR range if your service routine suits them better.
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.