The AirTAC GFR300-08MJC2WT AirTAC Filter Regulator NPT1/4 5um 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 AirTAC GFR300-08MJC2WT is a size-300 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration is built with 1/4 in NPT ports, a 5 um filter element (code W), a manual drain on the PC bowl, a round pressure gauge reading in psi, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the operating temperature range is -5 to 70 C (non-freezing), and the standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi).
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 inch, a choice of 40 um standard or 5 um fine filtration, differential-pressure, automatic or manual drains, and gauge or thread options to order. Flow figures for this series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-08MJC2WT AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| 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 | Standard 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, 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 130 psi). 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)). |
| (blank) | Standard 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. |
| 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) |
Point-of-use conditioning on a CNC machining cell: the 5 um element protects solenoid valves and tool-clamp actuators from condensate and fine particles, while the regulator holds a steady set pressure for clamping and tool-change circuits.
Feeding pick-and-place cylinders and diverters on a packaging conveyor line, where the combined filter regulator keeps one conditioned, regulated supply at each drop instead of separate filter and regulator bodies.
Conditioning air to spray guns in a paint or finishing booth: the 5 um grade helps keep finish quality by removing finer particulate, and the manual drain lets an operator bleed accumulated water from the bowl at each shift check.
Start with the size step: 200, 300, 400 and 600 move up in port size and flow capacity, so pick the step that matches your line's air demand - here 300 with 1/4 in NPT ports. Choose the drain to suit access: manual (this unit) suits supervised installations where someone bleeds the bowl; automatic or differential-pressure drains suit unattended drops. Choose 5 um (this unit) when downstream valves, cylinders or instruments need finer protection than the 40 um standard element. Then settle the gauge scale (MPa, psi or bar), the thread (PT is the standard; G and NPT are order options), and whether a bracket is needed (this unit ships without one).
Because flow for the G-series is published as curves and not as a single rated figure, ask us to confirm sizing against your actual air consumption 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 flow for the GFR series as curves rather than a single rated figure, so there is no one rated flow number we can honestly quote. Tell us your operating pressure and air consumption and we will confirm the datasheet curve figures for this model on request before you order.
The 5 um element (code W) is the finer option versus the 40 um standard, suited to downstream valves, cylinders and instruments that need cleaner air. The manual drain means an operator opens the bowl drain to remove accumulated condensate, which suits attended installations; automatic or differential-pressure drains are available on other GFR300 variants for unattended drops.
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.