The AirTAC GFR30008ALJC2G 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 AirTAC GFR30008ALJC2G 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 G1/4 (BSPP) port, a 40 um standard filtration element, an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator type suited to applications that run below standard regulated pressures. An external round gauge scaled in psi is fitted so the set pressure can be read at a glance, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part in the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, gauge and scale options, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the figures against your application - we will confirm the datasheet on request.
| Model | GFR30008ALJC2G 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 — 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. |
| (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) |
On a fixture line where clamp cylinders must hold at a gentle, closely managed pressure rather than full line pressure, this low-pressure filter regulator cleans the supply, drains condensate automatically and lets the setter dial in the clamp force on the psi gauge.
Spray guns and atomising equipment need clean, dry air delivered at a controlled low setting. This unit filters water and particulate from the booth supply, regulates it in the low-pressure band the gun expects, and its automatic drain keeps condensate out of the finish between shifts.
Bench-mounted test rigs and lab pneumatic panels often run instruments at modest pressures on 1/4 in lines. This G1/4 filter regulator conditions the bench supply, holds the set point readable on the psi gauge, and its automatic drain suits equipment left running unattended.
Start with the size and port: the 300 size with its G1/4 port suits lines where 1/4 in piping is the standard, and larger sizes 400 and 600 step up in port and flow capacity if your demand grows. Choose the drain to match maintenance access: this unit has an automatic drain, ideal where the unit is mounted in a hard-to-reach spot or the line runs unattended; manual and differential-pressure drains are available on other codes. The 40 um element is the standard grade for general plant air - choose the 5 um (W) option only where finer particulate removal is specified. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are alternatives. PT is the standard thread, with G and NPT as order options, and a mounting bracket can be added on codes that carry it. Because flow is published as curves and not a single rating, 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 flow for this series as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your line pressure and the demand of the equipment downstream, and we will confirm the sizing from the datasheet on request before you order.
The L in the code marks this as the low-pressure regulator type, intended for circuits that run below standard regulated pressures; its exact adjustment range is not published in the material we hold, so we confirm it on request. The A marks an automatic drain, which expels collected condensate by itself - no bowl draining rounds. The fitted C2 gauge reads in psi, and the J means no mounting bracket is supplied.
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.