The AirTAC GFR30008ALJC2WG AirTAC Filter Regulator G1/4 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 PT1/4" 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 GFR300 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one unit does the job of a filter and a regulator while taking up less panel space. This configuration is built on a G1/4 (BSPP) port in the 300 size, with a 5 um filter element (the finer W grade), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type for circuits that run below standard line pressure. A round external gauge with a psi scale is fitted so the set pressure is visible at the unit, and it is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR300 sits in the GFR range that spans the 200, 300, 400 and 600 sizes, with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um filtration, gauge styles and MPa/psi/bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR30008ALJC2WG AirTAC Filter Regulator G1/4 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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 | 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. |
| J | Supplied without bracket. |
| (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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a carton-sealing or wrapping line, this unit filters condensed water and fine particles out of the shop air and holds a steady reduced pressure to the sealing cylinders and grippers, with the automatic drain clearing condensate during long unattended shifts.
For lab automation manifolds and sample-transfer cylinders, the 5 um element protects sensitive pilot valves from particulate carryover while the low-pressure regulator type and psi gauge give visible, repeatable control at reduced pressures.
Feeding air cylinders that divert cartons on a sorting conveyor, this unit combines clean-up filtration and pressure regulation in one G1/4 body, keeping the gate actuators supplied with dry, filtered air at a stable set pressure.
Start with the port: this unit is the 300 size at G1/4, so step up to the 400 or 600 size if your circuit needs a larger port and more flow, or down to the 200 size for compact points of use - and let us check the published flow curves against your demand, since there is no single rated flow figure. The 5 um element fitted here is the finer option; the standard grade is 40 um, so choose 5 um where downstream valves and instruments need cleaner air. The automatic drain suits unattended installations; manual and differential-pressure drains are the alternatives if you prefer controlled or load-proportional purging. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the other options. Thread is G (BSPP) here, with PT as the catalogue standard and NPT orderable. If you need panel fixing, note this unit comes without a bracket, and the low-pressure regulator type is the right pick only for circuits running below standard line pressure - confirm the exact setting range with us 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 flow for the GFR300 as curves rather than a single rated figure, so we do not quote one number. Tell us your port size and air demand and we will confirm the flow curve and datasheet figures for this exact unit on request before you order.
The A in the code means the bowl drains itself: collected condensate is expelled automatically, which suits installations that run unattended or are hard to reach. The alternatives in the GFR range are a manual drain, where an operator purges the bowl, and the differential-pressure drain (the default), which purges in proportion to flow. This unit also carries the 5 um element, the finer grade versus the 40 um 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.