The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 5um 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 GFR-series 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 PT1/2 (1/2 in) port, the low-pressure regulator type (code L), a 5 um filter element (code W), an automatic drain that ejects collected condensate without manual attention, an external round gauge reading in psi, and a reverse/check valve (K) fitted. The bowl on this 300 size is polycarbonate (PC), and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, drain choices (differential-pressure, automatic or manual), 40 um standard or 5 um filtration, gauge and thread options (PT standard; G and NPT to order). Flow is published as curves rather than a single rating, so ask us to confirm flow and other datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 5um Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — round, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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. |
| (blank) | PT 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) |
Conditioning and regulating the air feeding blow-off nozzles that clear dust and stray film from cartons before sealing, with 5 um filtration protecting the nozzles and the automatic drain keeping condensate out of the air stream.
Supplying filtered, regulated air to clamp cylinders on a machining or assembly fixture, where the low-pressure regulator type suits a gentle setpoint and the check valve helps hold the circuit if upstream pressure dips.
Preparing the air feeding spray guns in a finishing booth, where fine 5 um filtration protects finish quality and the regulator holds a steady, low setpoint for consistent atomisation.
Choose the size by the flow your line needs: the 200, 300, 400 and 600 steps rise in port and capacity, and this unit is the 300 with a 1/2 in PT port. The L in the code marks the low-pressure regulator type, intended where the downstream setpoint sits below the standard range; the exact adjustment range for the low-pressure type is not published as a single figure, so confirm it with us before ordering. Drain options are differential-pressure (default), automatic (this unit) or manual; filtration is 40 um standard or 5 um (this unit, code W). Gauges are the embedded square type as standard, with an external round gauge optional in MPa, psi or bar scales (this unit: round, psi). Thread is PT as standard with G (BSPP) and NPT as order options, and the bracket can be included (as here) or omitted (code J). Because flow is published as curves, not a single rating, ask us to check the curve against your application 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure, setpoint and expected air demand, and we will confirm the flow from the datasheet curve for this 300-size, 1/2 in port unit.
The L in the code marks the low-pressure regulator type, intended where the downstream setpoint sits below what the standard regulator covers. The exact adjustment range for the low-pressure type is not published as a single figure, so confirm it with us against your setpoint before ordering. Everything else in this configuration - the 5 um element, automatic drain, psi gauge, check valve and included bracket - is unchanged.
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.