The AirTAC GFR300C15MJC3WT AirTAC Filter Regulator NPT 1/2 in, 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 GFR300C15MJC3WT is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has 1/2 in NPT ports, a 5 um filter element (the finer of the two grades offered), a manual drain on the bowl, and a round pressure gauge with a bar scale. It is the standard regulator type, with no reverse/check valve fitted and no mounting bracket included.
This is a genuine AirTAC part. The GFR family is made in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of 40 um or 5 um filtration, and differential-pressure, automatic or manual drains. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application before ordering.
| Model | GFR300C15MJC3WT AirTAC Filter Regulator NPT 1/2 in, 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
Filtering and regulating the compressed air feeding clamps, tool-change cylinders and pneumatic gates on a machining centre, with the 5 um element protecting sensitive downstream valves from water and fine particles.
Conditioning and setting supply pressure for sealing jaws, pushers and vacuum generators on a packaging line, where the manual drain lets an operator clear accumulated condensate as part of the shift-start routine.
Regulating and filtering the air feed to spray guns and atomising lines in a finishing booth, delivering clean, steady pressure without adding oil mist downstream of the unit.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow band your line needs; this unit sits at size 300 with 1/2 in NPT ports. Choose the drain to suit attendance: manual (this unit) suits a station where an operator drains the bowl on a routine, while automatic and differential-pressure drains suit unattended runs. Filtration is 5 um here versus the 40 um standard element - pick 5 um where finer downstream protection matters. The gauge on this unit is the external round type with a bar scale; embedded square gauges and MPa/psi/bar scales are the other options. Thread is NPT; PT (standard) and G are the alternative order options, and a mounting bracket can be specified if this one is ordered without.
Flow for this family is published as curves, not a single rated figure, so send us your application details and we will confirm sizing from 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 this family as curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote. Send us your application details and we will confirm the flow and sizing from the datasheet on request.
The M in the code selects a manual drain: condensate collected in the bowl is released by hand rather than automatically. It suits stations with regular operator attendance. If your installation runs unattended, the same family is available with automatic or differential-pressure drains instead.
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.