The AirTAC GFR30008ALF2K AirTAC Filter Regulator PT1/4, 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 AirTAC GFR30008ALF2K is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a PT1/4 (1/4 in) port, a 40 um standard filter element, and an automatic drain that expels collected condensate without manual attention. It is the low-pressure type, fitted with an embedded square gauge scaled in psi, a reverse/check valve, and includes a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with port options from 1/8 in to 1 in and thread choices of PT (standard), G, or NPT; drain, filter grade, gauge, and reverse-valve options vary by code. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR30008ALF2K AirTAC Filter Regulator PT1/4, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT 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. |
| (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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Bench setups that need clean, moisture-free air held at a stable, lower-than-line pressure for instrument and fixture testing - the low-pressure regulator type and square psi gauge give direct, readable control.
Carton-forming and sealing stations where water and debris in the shop air would jam actuators; the 40 um element and automatic drain keep the supply dry while the regulator holds the cylinder pressure the machine was set up for.
Spray-gun feed lines that require filtered air regulated to a low, steady setting; the check valve prevents downstream backflow from disturbing the set pressure, and the automatic drain handles condensate between shifts.
Start with the port step: 300 size covers 1/4 in here, while 200, 400, and 600 sizes step up or down in port and flow capacity - match the size to the air demand of the circuit. Choose the drain: automatic (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure is the default. Filter grade is 40 um standard; specify W for the 5 um element where finer filtration is needed. Gauge scale is selectable (MPa, psi, or bar) and this unit carries the square psi gauge; a reverse/check valve (K) is fitted here. Thread is PT as standard, with G and NPT available to order.
Because flow is published as curves and not a single rated figure, 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 GFR series as curves, not as a single rated number, so we do not quote a figure. Tell us your application and we will confirm the flow and datasheet figures for this exact model on request.
The A in the code selects the automatic drain, which expels collected condensate on its own - useful where the unit is not checked daily. The GFR family also offers manual drain and a differential-pressure default, selectable by code when you order.
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.