The AirTAC GFR300C08MJF2WT AirTAC Filter Regulator 1/4" NPT 5 um is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet 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 GFR300C08MJF2WT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single compact body. This 300-size unit is threaded NPT1/4 (1/4 in), carries a fine 5 um filter element (the W grade, an upgrade over the 40 um standard), drains by hand through its manual drain, and is fitted with an embedded square gauge reading in psi. The standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi), and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing. No reverse/check valve is fitted and no mounting bracket is included.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, PT as the standard thread and G (BSPP) or NPT as order options, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and gauge scale in MPa, psi or bar. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300C08MJF2WT AirTAC Filter Regulator 1/4" NPT 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| C0 | Port size See datasheet. 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Point-of-use conditioning on a machining centre: the 5 um element keeps swarf-blowoff and spindle-seal air free of water and fine particulate, while the regulator holds a steady set pressure for consistent clamping and actuator repeatability.
Feeding cylinders and diverters on a packaging conveyor: clean, regulated 1/4-in-supply air keeps stroke timing uniform across the line, and the psi gauge lets technicians verify set pressure at a glance during changeover.
Supplying pneumatic grippers and sample-handling actuators on laboratory automation: the fine 5 um grade protects sensitive instrument air, and manual drain suits the controlled environment where the bowl is checked as part of routine maintenance.
Size and port set the capacity: this is size 300 with a 1/4 in NPT port, one step up from size 200 - choose the next size up if your line may grow. The 5 um element (code W) suits downstream equipment that needs cleaner air than the 40 um standard; note that finer filtration costs a little more pressure drop. Manual drain means someone bleeds the bowl on a routine - pick automatic or differential-pressure drain if the unit sits where regular walk-by draining is impractical. The square gauge here reads in psi; MPa and bar scales are also available. PT is the standard thread, with G (BSPP) and NPT as catalogue options - this unit is the NPT version. No bracket is included with this code. Flow for the GFR series 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 flow for the GFR series as curves rather than a single rated number, so we do not quote a figure that could mislead your sizing. Send us your application details and we will confirm the flow curves and datasheet for this exact unit on request.
The M in the code means the bowl is drained by hand: an operator opens the drain at intervals to expel collected water. It is the right choice where the unit is inspected regularly. If the installation is hard to reach or runs unattended, the same family is available with automatic or differential-pressure drain instead - just ask for the matching code.
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.