The AirTAC GFR30008LJC2WGK 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 GFR30008LJC2WGK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a G1/4 (BSPP) port, a fine 5 um filter element (the W grade, versus the 40 um standard), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a low-pressure regulator type (code L). It is fitted with an external round gauge scaled in psi and a reverse/check valve (code K) that holds downstream pressure if the upstream supply drops. No mounting bracket is included (code J).
This is a genuine AirTAC part in the GFR300 series, one of four sizes (200/300/400/600) spanning the G-series port range from 1/8 to 1 inch, with PC bowls on sizes 200-400 and aluminium alloy bowls on size 600. Maximum working pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR30008LJC2WGK 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 — 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". |
| (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. |
| 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) |
Feeding a bench pneumatic press or clamping fixture where the downstream pressure must sit below normal line pressure and the check valve holds the clamp if the supply drops.
Conditioning shop air for lab benches and analytical instruments that need clean, dry, finely filtered air at a reduced, stable pressure.
Supplying spray guns and finishing stations where a 5 um element protects the finish from water and particulate and the regulator sets a gentle delivery pressure.
Choose the size and port step against the air consumption of the machine being supplied - the 300 size with its 1/4 in port suits compact circuits, while larger sizes carry more flow. This unit is already specified with the 5 um fine element; if your application only needs general protection, the 40 um standard grade is the alternative. Drain choice matters: differential-pressure (fitted here) needs no operator attention, while automatic and manual drains are the other catalogue options. The round psi gauge is fitted; embedded square gauges and MPa or bar scales are the other choices. Thread is G (BSPP) here - PT is the standard option and NPT is also orderable. A bracket can be added if panel or wall fixing is needed (this code omits it).
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated figure, and the exact regulation range of the low-pressure (L) type is not stated in the material we hold. Send us your line pressure, required downstream pressure and air consumption, and we will confirm suitability from 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 GFR300 series as performance curves rather than a single rated figure, so we do not quote one number. Send us your inlet pressure, target downstream pressure and air consumption, and we will confirm the sizing from the datasheet on request before you order.
L is the low-pressure regulator type (its exact range is not published - we confirm it on request), W is the fine 5 um filter element instead of the 40 um standard, and K means a reverse/check valve is fitted to hold downstream pressure. The code also shows a round psi gauge (C2), G thread, no bracket (J), and the default differential-pressure drain.
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.