The AirTAC AirTAC GFR30008ALJF2WG Filter Regulator G1/4 5 um 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 GFR30008ALJF2WG is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration carries a G1/4 (BSPP) port, a fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type (code L) for circuits that run below standard working pressure. An embedded square gauge with a psi scale is fitted, no mounting bracket is included (code J), and no reverse/check valve is fitted.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um fine filtration, and gauge scales in MPa, psi or bar. Flow is published as curves rather than a single rated figure, so we confirm datasheet and sizing figures on request.
| Model | AirTAC GFR30008ALJF2WG Filter Regulator G1/4 5 um 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 — 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. |
| J | Supplied without bracket. |
| (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. |
| 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) |
Filtered, regulated air at a reduced set pressure actuates clamp cylinders that hold workpieces during milling or drilling, with the 5 um element protecting the clamping valves from particulate carryover.
The filter regulator conditions the supply feeding sealing jaws and pick-and-place cylinders on a packaging machine, with the automatic drain emptying condensate during continuous shifts so no one has to bleed the bowl by hand.
Instrument air for test rigs and pilot-scale rigs is filtered to 5 um and held at a stable low set pressure, with the psi-scaled square gauge giving operators a direct local reading at the bench.
Choose the size and port step against the air demand of your circuit: this unit is size 300 with a G1/4 port; larger sizes carry larger ports and more flow capacity. Drain type is a real choice - automatic (fitted here) for unattended condensate removal, manual for periodic draining, or the differential-pressure default. Filter grade is a choice too: 40 um is standard, 5 um (this unit, code W) suits finer downstream needs. Gauge scale can be MPa, psi (this unit) or bar, and the thread can be ordered as PT (standard), G or NPT. A bracket is optional; this code (J) omits it. Note this is the low-pressure type (L); its exact regulation range is not published, so ask us to confirm it against your set pressure. Because flow is published as curves rather than 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 the GFR series as curves, not as a single rated number, so we do not quote a figure here. Send us your air demand and line conditions and we will confirm the sizing against the datasheet on request before you order.
The automatic drain (code A) expels collected condensate from the bowl by itself, unlike a manual drain that must be opened periodically. The L in the code marks the low-pressure regulator type, intended for circuits running below standard working pressure; its exact regulation range is not published, so ask us to confirm it against your set point.
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.