The AirTAC GFR30008MLJC3WT AirTAC Filter Regulator NPT1/4 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR30008MLJC3WT is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration takes a 1/4 in NPT port, carries the 5 um filter element (the finer of the two published grades) and uses a manual drain, so the polycarbonate bowl is emptied by hand as part of routine maintenance. It is the low-pressure type and comes fitted with a round gauge scaled in bar. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The G-series filter regulator line spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT, G or NPT threads, 40 um standard or 5 um (W) elements, differential-pressure, automatic or manual drains, and gauge or no-gauge builds. Flow for this series is published as curves rather than a single rated figure, so send us your application and we will confirm sizing and the full datasheet on request.
| Model | GFR30008MLJC3WT AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 3 | Gauge scale: bar. 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. |
| (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) |
Conditioning the air feed to quarter-turn actuator test rigs, where the 5 um element protects pilot valves and the round bar gauge gives a direct readout of the set pressure.
Point-of-use air treatment for lab benches and analytical-instrument supplies, where a fine 5 um element and a hand-checked, manually drained bowl are part of the daily setup.
Treating the 1/4 in air feed to a tool-clamp or fixture-clamp circuit on a CNC machine, with the manual drain emptied during scheduled maintenance rounds.
Every choice in GFR30008MLJC3WT is decodable from the code: size 300 with a 1/4 in NPT port, manual drain (M), low-pressure regulator type (L), no mounting bracket (J), round gauge on a bar scale (C3), 5 um element (W) and NPT thread (T). If your line needs the coarser 40 um element, an automatic or differential-pressure drain, a psi or MPa gauge scale, a bracket, or a PT/G thread instead, the same series carries those variants - match the code letters to the option you want. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 G-series flow as curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote for the GFR300 size. Send us your application details and we will confirm the flow curve and sizing from the datasheet on request.
The M in the code selects a manual drain: the polycarbonate bowl is emptied by hand during maintenance instead of relying on an automatic or differential-pressure mechanism. The W selects the 5 um element, the finer of the two published grades (40 um is standard). Both are order options across the GFR series if you prefer a different combination.
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.