The AirTAC GFR30008ALF2GK AirTAC Filter Regulator G1/4 Low-Pressure 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 AirTAC GFR30008ALF2GK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built around a G1/4 (1/4 in) port with G thread, a 40 um standard filter element, and an automatic drain that removes collected condensate without manual attention. The regulator is the low-pressure type, and the unit carries an embedded square gauge scaled in psi. A reverse/check valve is fitted, the mounting bracket is included, and the polycarbonate bowl suits a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C, non-freezing.
This is a genuine AirTAC part in the GFR300 size. The GFR line spans 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, and options include manual or differential-pressure drains, a 5 um element (code W), external round gauges with MPa, psi or bar scales, and G or NPT threads in place of the PT standard. Flow for this series is published as curves rather than a single rating, so ask us to confirm the figures for your application on request.
| Model | GFR30008ALF2GK AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| 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 | 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. |
|---|---|
| 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. |
| 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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding filtered, regulated air to cylinder-driven carton sealers and case packers on a packaging conveyor, where the automatic drain keeps condensate out of the valves between shifts.
Supplying filtered, regulated air to spray guns and air knives in a finishing booth, where the low-pressure type regulator holds a lower set pressure than a standard unit.
Regulating air to pneumatic clamps and grippers on a machining or assembly cell, with the psi-scaled square gauge giving operators a direct setpoint readout at the machine.
Choose the size and port against the flow your line needs: this unit is size 300 with a G1/4 port, and larger sizes move more air. Drain choice matters - automatic (this unit) suits unattended duty, manual suits periodic checks, and differential-pressure drain is the catalogue default. The 40 um element is standard; specify the W code for 5 um where finer filtration is needed. The square gauge here reads psi; MPa and bar scales are available, and an external round gauge is an option. PT is the standard thread, with G and NPT as order options, and the bracket is included. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Send us your port size, working pressure and demand, and we will confirm the flow figures from the datasheet on request.
A is the automatic drain, which expels collected condensate without manual intervention, and L marks the low-pressure regulator type, whose exact adjustment range is not published - we confirm it on request. The square gauge on this unit reads in psi, and a 40 um element is fitted as standard.
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.