The AirTAC GFR30008LJF2WG AirTAC Filter Regulator G1/4 Low-Pressure 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 GFR30008LJF2WG is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single 300-size body with a G1/4 (BSPP) port. This configuration carries the W-code 5 um filter element for finer air cleaning than the standard 40 um grade, a differential-pressure drain that bleeds accumulated condensate whenever the pressure differential across the element rises, and the low-pressure type regulator for circuits that run below standard regulator settings. The embedded square gauge is fitted with a psi scale so downstream pressure can be read at a glance, and no mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl keeps the condensate level visible.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, standard or low-pressure regulation, square or optional external round gauges in MPa, psi or bar scales, and PT, G or NPT threads. 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 | GFR30008LJF2WG AirTAC Filter Regulator G1/4 Low-Pressure |
|---|---|
| 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 | 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". |
| (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. |
| (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) |
Fixture clamps that must close gently rather than at full line pressure suit the low-pressure regulator: the operator sets a reduced downstream pressure on the psi gauge while the 5 um element keeps seal-damaging particles and water out of the clamp cylinders.
Instrument purge and enclosure-pressurisation lines need clean, steady, low-pressure air. The 5 um element protects sensitive fittings and tubing, the square psi gauge gives a clear reading at the panel, and the differential-pressure drain handles condensate on continuously running supply.
Carton-forming and label-head cylinders on packaging lines often run below standard shop-air settings. This filter regulator conditions the branch feed - filtering water and particulate at 5 um and holding the reduced setting - so valve spools and small cylinders last longer.
Start with the port step: this unit is 300 size with a G1/4 port; step up to 400 or 600 if your line needs more flow capacity, or down to 200 for compact circuits. Filtration is set at 5 um here (code W); the standard grade is 40 um if your application does not need finer cleaning. Drain is differential-pressure, which suits lines with steady duty; an automatic drain (code A) empties the bowl without a pressure swing, and a manual drain (code M) suits intermittent duty. The gauge fitted is the embedded square type with a psi scale; MPa or bar scales and an external round gauge are alternatives. Thread is G (BSPP); PT is the standard thread and G or NPT are order options. No mounting bracket is included (code J) - add one if the unit will not be screwed directly into a manifold or line. The regulator is the low-pressure type for circuits set below standard regulator ranges. Flow is published as curves, not a single rating, so send us your flow and pressure requirements 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 the GFR series as curves rather than a single rated figure, so we do not quote one number. Tell us your required flow and working pressure and we will confirm the sizing from the datasheet on request before you order.
The W code in the model specifies the finer 5 um filter grade, which removes smaller particles than the 40 um standard element. It is the right choice for valves, cylinders and instruments that are sensitive to fine contamination. If your application does not need fine filtration, the 40 um version of the same GFR300 unit is available - ask us and we will confirm the correct code.
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.