The AirTAC GFR30008ALJC2WTK AirTAC Filter Regulator NPT1/4 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 GFR30008ALJC2WTK is a size-300 GFR filter regulator: filtration and pressure regulation combined in one body, with a 1/4 in NPT port. This configuration carries the W-code 5 um filter element for finer water and particulate removal than the standard 40 um grade, an automatic drain that ejects collected condensate without manual attention, and the L-code low-pressure regulator type for circuits that run below standard line pressure. It is fitted with a round pressure gauge reading in psi, a reverse/check valve (K) that holds downstream pressure when the upstream supply is lost, and no mounting bracket (J code). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR range spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is ordered with choices of drain type, filter grade, gauge style and scale, thread form (PT standard, G and NPT as options), bracket and reverse valve. 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 | GFR30008ALJC2WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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 | 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. |
| 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeds and regulates a 1/4 in clamp or hold-down actuator circuit that runs below standard line pressure, with the 5 um element protecting the valve seats and the check valve holding clamp pressure if the upstream supply drops.
Conditions instrument air for a bench-scale process rig: the 5 um grade removes fine water and particulate ahead of sensitive pneumatic controls, the psi gauge gives a local reading, and the automatic drain handles condensate without operator visits.
Regulates the low-pressure supply to diverter gates and stop cylinders along a sorting conveyor, with the automatic drain keeping the bowl clear across shifts and the check valve preventing backflow through the unit.
Choose the GFR size by port and expected flow: this unit is size 300 with a 1/4 in NPT port; larger sizes step up to bigger ports and more flow. The 5 um (W) element suits applications needing finer filtration than the 40 um standard; the automatic drain suits unattended duty, while manual and differential-pressure drains are the alternatives in the range. The round psi gauge is fitted here; embedded square gauges and MPa or bar scales are the other gauge choices. NPT is the thread on this code; PT is the catalogue standard and G is also available to order. No bracket is supplied with this J-code unit. Because flow is published as curves and not a single rating, send us your application details 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. 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 rated flow, Cv or SCFM figure. Send us your line pressure and flow requirement and we will confirm the sizing from the datasheet curves on request.
The W code in the model sets the 5 um filter grade instead of the 40 um standard, for finer removal of water and particulate. The A code sets the automatic drain, which discharges collected condensate on its own; manual and differential-pressure drains are the other options in the GFR range if you prefer a different arrangement.
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.