The AirTAC GFR30008ALJC2WT AirTAC Filter Regulator 1/4 in NPT 5 um 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. This configuration is built with a 1/4 in NPT port, an automatic drain that expels collected condensate without manual attention, a 5 um filter element (the W grade, finer than the 40 um standard) and the low-pressure regulator type for circuits that run at reduced set pressures. A round gauge scaled in psi is fitted so operators can read the downstream setting at a glance, and the bowl on this 300 size is polycarbonate.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge style and scale, PT, G or NPT thread, and bracket options. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The setting range of the low-pressure type is not published in our sheet, so we confirm it on request together with flow, which AirTAC publishes as curves rather than a single rating.
| Model | GFR30008ALJC2WT AirTAC Filter Regulator 1/4 in NPT 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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. |
| T | NPT 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) |
Feeding filtered, regulated air at low set pressure to carton-sealing cylinders and glue-head valves on a packaging line, with the automatic drain clearing collected condensate between shifts.
Conditioning shop air to a fine 5 um supply for sample-handling valves and small pneumatic actuators on laboratory and analytical instruments that need steady low-pressure air.
Supplying divert gates and stopper cylinders on a bottling or conveyor line, where the built-in filter protects directional valves and the psi gauge keeps the setting visible to operators.
Size and port set the flow path: this GFR300 carries a 1/4 in NPT port; step up to GFR400 or GFR600 for larger ports and more flow, or down to GFR200 for compact lines. Drain choice matters: the automatic drain fitted here suits unattended duty, a manual drain suits supervised points, and the differential-pressure default drains on a pressure drop. Filtration is 5 um here (code W); the standard 40 um element is the choice where coarser protection is enough. The gauge is round and scaled in psi; an embedded square gauge and MPa or bar scales are catalogue alternatives. On thread, PT is the AirTAC standard while G (BSPP) and NPT are order options - this unit is specified NPT. A mounting bracket is optional and this configuration is supplied without one. Flow is published as curves, not a single rating, so send us your demand and we will confirm sizing against the datasheet before you order.
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 number here. Send us your line pressure and demand and we will confirm the flow from the datasheet on request.
This unit carries code A, the automatic drain, which expels collected condensate without anyone opening the bowl - useful on unattended or hard-to-reach installations. Manual and differential-pressure drains are catalogue alternatives if you prefer a different drain style.
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.