The AirTAC GFR300C15MLJC3WTK 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 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 GFR300C15MLJC3WTK is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in one body. This configuration is built around a 1/2 in NPT port, a fine 5 um filter element (the W grade, versus the standard 40 um), a manual drain on the metal bowl, and a low-pressure regulator type. It ships as coded with a round external gauge reading in bar, a reverse/check valve fitted, and no mounting bracket.
This is a genuine AirTAC part from the G-series line, which spans sizes 200, 300, 400 and 600 with port options, drain types, filter grades, gauge styles and scales to match. We do not quote a single rated flow figure because AirTAC publishes flow as curves; ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR300C15MLJC3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
On a fixture line where clamp cylinders hold workpieces through a machining or welding cycle, this unit filters the shop air to 5 um and holds a steady low set pressure so clamping force stays repeatable from part to part.
Filling, sealing and cartoning machines run banks of small air cylinders that are sensitive to dirt and pressure drift; this filter regulator conditions their half-inch supply header and the manual drain lets maintenance bleed accumulated water at shift checks.
Test rigs and laboratory benches that feed air to instruments or low-pressure process circuits benefit from the fine 5 um element and the low-pressure regulator type, with the round bar gauge giving a clear reading at the bench.
Size and port drive the choice: the 300 frame with a 1/2 in NPT port suits lines plumbed at half-inch, and stepping up to 400 or 600 buys more flow capacity while 200 covers smaller drops. The 5 um element (code W) is the pick when downstream valves, cylinders or instruments want finer filtration than the standard 40 um; pair it with the manual drain when an operator can bleed the bowl on a routine walk-round. The low-pressure regulator type is intended for circuits set well below standard regulator territory - confirm the exact adjustment range with us before ordering. Gauge options are the embedded square type or this external round type, in MPa, psi or bar scales; thread is PT as standard with G and NPT as order options, and a bracket can be added if this no-bracket build does not suit your panel.
Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing 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 this series as curves rather than a single rated figure, so we do not quote a number. Send us your line pressure, set pressure and expected air demand, and we will confirm the flow and datasheet figures for this exact model on request.
The M in the code specifies a manual drain: an operator opens the bowl drain to expel collected water, which suits installations on a regular maintenance walk-round. The W code specifies the 5 um filter element instead of the 40 um standard, giving finer protection for downstream valves, cylinders and instruments.
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.