The AirTAC GFR30008MLJC1WT AirTAC Filter Regulator NPT1/4 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 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 GFR30008MLJC1WT is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body, so one 1/4 in (NPT) unit removes water and particulate down to 5 um and then lets you set and hold downstream pressure. This configuration is the low-pressure type, fitted with an external round MPa gauge so the set point is visible at the machine, a manual drain for the bowl, and no mounting bracket. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl suits 200/300/400 sizes.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in and PT, G or NPT threads, with manual, automatic or differential-pressure drains and 40 um or 5 um elements. Rated flow for this series is published as curves rather than a single figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR30008MLJC1WT AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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, MPa 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. |
| 1 | Gauge scale: MPa. 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) |
Clamp cylinders on a CNC fixture that must hold at a low set pressure get filtered 5 um air and a stable, gauge-visible set point from one 1/4 in NPT unit mounted at the fixture drop.
A cartoning or wrapping machine with many small air cylinders uses one filter regulator per section: the 5 um element protects the valves, and the low-pressure type suits actuators rated below full line pressure.
A laboratory test bench or pilot rig drawing instrument air through 1/4 in NPT lines gets water and fine particulate removed and a low, repeatable set pressure read directly off the round MPa gauge.
Size and port step up together: 200, 300, 400, 600 correspond to larger ports and more flow, so pick the smallest size whose curve covers your worst-case air demand - here the 300 size on a 1/4 in NPT thread. This unit is the low-pressure type, intended where the required set point sits below what a standard regulator is aimed at; the exact adjustment range for the L type is not published in our sheet, so confirm it with us. The 5 um element (code W) is the finer of the two published grades, chosen over the 40 um standard when downstream valves and cylinders need cleaner air. Manual drain means an operator opens the bowl drain during checks - choose automatic or differential-pressure drain if the unit will be left unattended. The round MPa gauge is fitted; square embedded gauges and psi or bar scales are orderable options, as are G or PT threads and a mounting bracket.
Flow for this series is published only as curves, not a single rated number, so send us your line pressure and air demand 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. 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 GFR300 series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Send us your inlet pressure and air demand and we will confirm the sizing against the datasheet on request.
Manual drain means the bowl is emptied by opening its drain fitting during routine checks, which suits attended machines; automatic or differential-pressure drain versions are available if the unit cannot be checked regularly. The L in the code marks the low-pressure regulator type, intended for set points below the standard type's range - the exact adjustment range for this type is not published in our sheet, so confirm it with us before ordering.
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.