The AirTAC GFR30008LJF2WGK AirTAC Filter Regulator G1/4, 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 differential-pressure 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 GFR30008LJF2WGK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in one body, for compressed air only. This size 300 unit is built with a G1/4 (BSPP) port, the low-pressure regulator type for circuits set below the standard range, a fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the bowl is sufficient, an embedded square gauge scaled in psi, and a built-in reverse (check) valve that holds downstream settings when upstream air is lost. No mounting bracket is fitted on this variant.
This is a genuine AirTAC part from the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of drain types, 40 um or 5 um elements, gauge scale options and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR30008LJF2WGK AirTAC Filter Regulator G1/4, 5 um |
|---|---|
| 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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 filtered, regulated air to a light-duty clamping or forming station where the operator sets a lower working pressure than a standard regulator circuit, with the check valve holding the setting between strokes.
Conditions the air feeding guide cylinders and stopper gates on a packaging conveyor, with the 5 um element protecting close-tolerance valves and the differential-pressure drain shedding condensate without operator input.
Supplies clean, regulated air to panel-mounted pilot valves and actuators, with the square psi gauge giving a local setpoint readout and the reverse valve preventing setpoint drift during supply dips.
Start from the flow your line needs and step up through the GFR sizes (200, 300, 400, 600) and their port sizes; this unit is the size 300, 1/4 in step. Choose the drain to match maintenance habits: differential-pressure (as fitted here) needs no attention, automatic drains continuously, and manual requires periodic bleeding. Pick the element grade for the air quality downstream: 40 um is the standard protection grade, while the 5 um element on this model suits finer pneumatic components. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are selected at ordering, as is the bracket.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated figure, so send us your application details and we will confirm the 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 family as curves rather than a single rated number, so there is no one figure we can honestly quote. Send us your application and we will confirm the flow and sizing from the datasheet on request before you order.
The K in the code means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply drops. F2 means the embedded square gauge is scaled in psi; MPa or bar scales, or an external round gauge, are available on other variants.
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.