The AirTAC GFR300C15MNWTK AirTAC Filter Regulator 1/2 in NPT 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 GFR300C15MNWTK is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit is threaded 1/2 in NPT, carries a 5 um filter element (code W), a manual-drain polycarbonate bowl, and a built-in reverse/check valve (code K). No gauge is fitted. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator setting range is 0.05-0.9 MPa (7-130 psi) with manual drain, and the working temperature range is -5 to 70 C, non-freezing. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options for drain type (differential-pressure, automatic or manual), 40 um or 5 um filtration, gauge type and scale, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm flow and full datasheet details for your application.
| Model | GFR300C15MNWTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| 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) |
Fitted at the drop leg feeding a CNC machining centre, the unit filters the supply to 5 um and holds a steady pressure setting for the machine's pneumatic valves, clamps and tool-change actuators.
On a carton-forming and sealing line, the filter regulator conditions the air feeding cylinder-driven grippers, pushers and sealers, with the manual drain emptied during scheduled changeover.
At a truck or bus depot service bay, the unit gives technicians filtered, regulated air at the hose reel for impact wrenches and tyre inflation, with the check valve holding the downstream setting.
Size and port set the air capacity: this unit is size 300 with 1/2 in NPT ports; step up to size 400 or 600, or down to 200, if your circuit needs a different port. Drain choice matters: manual drain (this unit, code M) needs periodic bowl draining, while automatic and differential-pressure drains remove condensate without attention; the manual-drain version also carries the wider 0.05-0.9 MPa (7-130 psi) setting range. Filtration here is 5 um (code W); 40 um is the standard element where finer filtration is not required. No gauge is fitted on this code; gauge style (round or square) and scale (MPa, psi or bar) can be specified on other codes. PT is the standard thread and G (BSPP) and NPT are catalogue options - this unit is ordered with NPT. 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 figure, so we do not quote one number. Send us your application details and we will confirm the flow and the full datasheet figures on request.
Code M specifies a manual drain: the bowl is drained by hand at intervals. If you prefer unattended condensate removal, the same size 300 filter regulator can be ordered with an automatic (code A) or differential-pressure (blank) drain; note the manual-drain version also allows the wider 0.05-0.9 MPa (7-130 psi) setting range.
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.