The AirTAC GFR300C15MLJNWTK AirTAC Filter Regulator NPT1/2, 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 GFR300C15MLJNWTK is an AirTAC GFR300 filter regulator: one body that first removes water and particulate from compressed air, then regulates downstream pressure. This configuration is built around a 1/2 in NPT port, a fine 5 um filter element, and a manual drain bowl in metal, so condensate is emptied by hand rather than automatically. The regulator is the low-pressure type, and a reverse/check valve is fitted to hold the set pressure against backflow. No pressure gauge is supplied and no mounting bracket is included, so plan your panel or machine interface accordingly.
This is a genuine AirTAC part from the G series, which spans sizes 200, 300, 400 and 600 with a choice of ports, threads, drain types, filter grades, gauges and bracket options. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us and we will confirm the figures from the datasheet for your application.
| Model | GFR300C15MLJNWTK AirTAC Filter Regulator NPT1/2, 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) |
Air cylinders that clamp workpieces on a CNC fixture get filtered, low-pressure-regulated air from this unit, with the 5 um element protecting the directional valve and the check valve holding the clamp circuit against backflow.
On a carton packaging line, this filter regulator supplies the air cylinders that divert and push packs, with manual drain suits a line that is blown down at shift end and the 1/2 in NPT port feeding a multi-cylinder manifold.
A spray booth or coating cell running at reduced pressure uses the low-pressure regulator type here, while the 5 um filtration keeps oil-free, dry-enough air reaching the applicator; the metal bowl is emptied during daily housekeeping.
Size 300 with a 1/2 in NPT port sits in the middle of the G series range; step up to size 400 or 600 when the flow curve for your air demand says so, or down to size 200 for lighter lines. The 5 um element here is the finer of the two published grades (40 um is the standard), suited when downstream valves and cylinders need cleaner air. Drain choice matters: this unit is manual drain, so it needs a scheduled check, whereas automatic or differential-pressure drain versions empty themselves. The low-pressure regulator type is intended for circuits that run well below standard settings; its exact adjustment range is not published, so confirm it with us. Gauge, thread (PT standard, G or NPT to order) and bracket are all selectable - this code ships with no gauge and no bracket, and the fitted reverse/check valve is a plus on circuits where backflow is a risk. Because flow is published as curves, not a single rating, 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 this series as curves, not as a single rated number, so we do not quote a figure. Send us your application details and we will confirm the relevant flow-curve values and sizing from the datasheet on request.
Manual drain means the metal bowl is emptied by hand on a schedule instead of automatically; automatic and differential-pressure drain versions of the same size exist if you prefer self-draining. The regulator in this code is the low-pressure type, intended for circuits that run below standard settings; its exact adjustment range is not published, so confirm it with us before ordering. Note this unit also has no gauge fitted and no bracket included.
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.