The AirTAC GFR300-15MJC1T AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 GFR300-15MJC1T is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This 300-size unit is fitted with a 1/2 in NPT port, a manual drain bowl in polycarbonate, a standard 40 um filter element, and a round pressure gauge with an MPa scale. The regulation range for this manual-drain configuration is 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.
This is a genuine AirTAC part. The GFR family is available in 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, an optional 5 um filter element (code W), square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request before you order.
| Model | GFR300-15MJC1T AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, 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. 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a CNC machining centre, the GFR300-15MJC1T cleans the shop air supply and holds a steady regulated pressure to the clamping and tool-change cylinders, with the MPa gauge giving the operator a visible setpoint and the manual drain allowing bowl bleeding during shift checks.
On a carton-forming and sealing line, this filter regulator feeds the pick-and-place and sealing cylinders from a 1/2 in NPT main, removing water and 40 um particulate before the valves while the regulator keeps actuator pressure consistent through the shift.
On a bottling plant fill-and-capping station, the unit conditions and regulates the air feeding solenoid valve manifolds that actuate fill, rinse and capping valves, with the round MPa gauge letting maintenance verify the setpoint and the manual drain cleared during scheduled downtime.
Size and port: the GFR range steps through 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, so pick the size whose flow curve covers your demand with margin - we can check the curve against your application on request. Drain: this unit is manual drain, which suits supervised installations where an operator bleeds the bowl on a routine; choose automatic or differential-pressure drain for unattended lines. Filter grade: 40 um is the standard element; specify the 5 um W option where downstream equipment needs finer filtration. Gauge: the embedded square gauge is standard, with an external round gauge optional and MPa, psi or bar scales. Thread: PT is the standard; G (BSPP) and NPT are catalogue options to order. Bracket: the J suffix means no mounting bracket is fitted - order the bracket version if you want panel or surface mounting. Because flow is published as curves rather than a single rating, ask us to confirm sizing against the 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, not as a single rated figure, so we do not quote a number here. Tell us your application and expected air demand and we will confirm the sizing from the datasheet flow curve on request before you order.
The M in the code GFR300-15MJC1T means the polycarbonate bowl is drained by hand, which suits installations that are checked regularly. The GFR family is also available with automatic drain (code A) or differential-pressure drain (blank) for unattended operation, in the same 300 size and NPT thread option.
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.