The AirTAC GFR300C08MJF1T AirTAC Filter Regulator NPT1/4 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 GFR300C08MJF1T is an AirTAC GFR series filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This 300-size unit is threaded NPT 1/4 in, has a manual drain on the bowl, a 40 um standard filter element and a built-in square pressure gauge scaled in MPa. The regulator is the standard type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans 200, 300, 400 and 600 sizes with port options from 1/8 to 1 in, PT as the standard thread and G or NPT to order, plus drain, filter-grade, gauge and bracket choices. AirTAC publishes flow as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before you order.
| Model | GFR300C08MJF1T AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
Filtered and regulated air feeds the clamp cylinders on a CNC fixture, holding consistent clamping force on the workpiece through a full shift.
Mounted at the drop feeding a conveyor run, it conditions air for stoppers and diverters and keeps their operating pressure steady as product flows past.
Clean, regulated air to a solenoid-valve and actuator package on a bottling or dosing line, keeping water and debris out of the valve seat.
Choose the size by port and flow demand: this 300-size unit carries a 1/4 in NPT port, one step up from the 200 series. Drain is manual here - condensate is released by hand - while automatic and differential-pressure drains are catalogue options if you prefer hands-off removal. The 40 um element is the standard grade; specify code W for the 5 um option. The fitted square gauge reads in MPa, with psi or bar scales and an external round gauge as alternatives, and the NPT thread can be ordered as PT or G instead. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm this unit is correctly sized 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 GFR series as curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your required flow and working pressure and we will confirm the sizing against the datasheet on request.
The M in the code is the manual drain: condensate collected in the bowl is released by hand, which suits stations visited daily. Automatic and differential-pressure drains are catalogue options on the GFR family if you would rather not rely on an operator.
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.