The AirTAC GFR300-08LJC2W AirTAC Filter Regulator PT1/4, 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 GFR300-08LJC2W is a filter regulator: water and particulate removal plus pressure regulation combined in one body. This 300-size unit carries a PT1/4 in port, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a low-pressure regulator type for circuits that run below standard working ranges. A round gauge scaled in psi is fitted so the set pressure is visible at the unit, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, square or round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application before ordering.
| Model | GFR300-08LJC2W AirTAC Filter Regulator PT1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT 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 — 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". |
| (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). |
| 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. |
| (blank) | PT 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) |
On a packaging machine where clamp cylinders must close gently at a reduced set pressure, this unit filters the incoming plant air to 5 um and regulates it down, with the psi gauge letting the setter verify the clamping pressure at the unit.
A paint or coating line feeding spray guns needs air with fine particulate removed and the pressure held steady at a modest setting; the 5 um element and low-pressure regulator type in this GFR300 handle both jobs in a single 1/4 in drop.
Sorting and divertor cylinders on a conveyor line run continuously, so the differential-pressure drain keeps condensate moving out as air flows past, while the regulator holds a consistent supply pressure for repeatable actuator strokes.
Start with the port: this unit is 1/4 in on the 300 body, so step up to size 400 or 600 if your line needs more flow capacity, or down to 200 for compact circuits. Drain choice matters: differential-pressure (fitted here) drains with flow, automatic drains on a timer-free principle, and manual requires someone to press the button - pick based on how often the machine runs unattended. Filter grade is 5 um on this model (code W); the 40 um standard element suits general plant air, while 5 um protects finer components downstream. The fitted gauge reads in psi; MPa and bar scales are also catalogue options. Thread is PT as standard with G and NPT available to order, and a bracket can be specified if you want panel mounting.
One honest note on sizing: AirTAC publishes flow for this family as curves, not a single rated figure, so send us your application details and we will confirm the right size 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 family as curves rather than a single rated figure, so there is no one number we can honestly quote. Tell us your application - working pressure, downstream consumption and line length - and we will confirm the sizing against the datasheet on request before you order.
The W in the code GFR300-08LJC2W specifies the 5 um element, the finer of the two catalogue grades, suited to protecting sensitive components downstream. The standard grade is 40 um and is the default when no W appears in the code; both are available across the GFR range, so choose based on what the equipment after the unit needs.
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.