The AirTAC GFR30008ALF2G AirTAC Filter Regulator G1/4, Auto Drain is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" 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 GFR30008ALF2G is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a G1/4 (BSPP) port, an automatic drain that ejects collected condensate without operator attention, a 40 um standard filter element, and the low-pressure regulator type (code L) - its exact adjustment range is not published, and we confirm it on request. The embedded square gauge is fitted with a psi scale, the bowl on this 300 size is polycarbonate (PC), and a mounting bracket is included.
This is a genuine AirTAC part. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, PT as the standard thread and G or NPT as order options, plus a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, and round or square gauges in MPa, psi or bar scales. Rated flow is published as curves rather than a single figure, so ask us to confirm flow and datasheet details for your application.
| Model | GFR30008ALF2G AirTAC Filter Regulator G1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) thread) |
| Filtering grade | 40 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 | Not fitted |
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. |
|---|---|
| 08 | Port size PT1/4". 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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. |
| (blank) | No reverse-flow valve (the default). |
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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Supplying clean, pressure-controlled air to a clamping fixture or small pneumatic press on a production line, with the automatic drain keeping condensate out of the downstream valve stack.
Filtering and regulating air to a spray-gun or coating line where the low-pressure regulator type matches a reduced-pressure circuit, and the psi gauge lets operators set the working pressure.
Feeding cylinders and diverters on a packaging conveyor, with the square psi gauge giving a clear at-a-glance line pressure check during changeover.
Size and port set the air capacity: this unit is size 300 with a 1/4 in port; step up to 400 or 600 when the line needs more air. Drain type is a real choice: automatic (this unit) clears condensate by itself, manual needs an operator to open it, and differential-pressure drain bleeds only when the pressure drop builds. Filter grade is 40 um standard here; specify W for 5 um finer filtration. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are decodable options, and a bracket is included with this unit. Because rated flow is published as curves rather than one number, 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes rated flow for the GFR300 as curves, not as a single rated number, so we do not quote a figure here. Tell us your operating pressure and air demand and we will confirm the flow from the datasheet before you order.
It is the automatic drain: the unit ejects collected condensate from the bowl without operator attention, unlike a manual drain that must be opened by hand. Manual and differential-pressure drains remain order options if you prefer them.
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.