The AirTAC GFR300C15ALJF1WTK 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 GFR series combines water and particulate filtration with pressure regulation in a single body, so one unit cleans the air and holds your downstream pressure instead of two separate components. This GFR300C15ALJF1WTK is the 300 size with a 1/2 in NPT port, fitted with the 5 um filter element (code W) for finer particle removal than the standard 40 um grade, an automatic drain that expels collected condensate without anyone opening the bowl, a metal bowl, and the low-pressure regulator type for circuits that run below standard regulating ranges. The embedded square gauge (MPa scale) sits on the body for direct downstream pressure reading, a reverse/check valve is fitted to hold downstream pressure when the supply drops, and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and can be ordered with manual or differential-pressure drains, the 40 um standard element, G (BSPP) or NPT threads in place of the PT standard, alternative gauge scales (psi or bar), a bracket, and with or without the reverse valve. Flow is published as curves rather than a single rating, so ask us to confirm the flow and datasheet figures for this exact model against your application before ordering.
| Model | GFR300C15ALJF1WTK 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) |
Feeds filtered, regulated air to the tool-change clamps and pneumatic gates on a machining centre, where the 5 um element protects spool valves from fine particles and the automatic drain keeps condensate out of an unattended cell.
Supplies the air cylinders that divert cartons and actuate sealing bars on a packaging conveyor, with the low-pressure regulator holding a gentle, stable supply for delicate product-handling actuators.
Conditions the actuation air on secondary lines in a food processing plant - gate, flap and reject cylinders - where the metal bowl and automatic drain suit washdown-adjacent areas that cannot rely on manual draining.
Start with the port step: this unit is 300 size with a 1/2 in NPT port, so check that your downstream air demand sits comfortably inside what a 1/2 in filter-regulator of this family handles - we can confirm sizing from the published flow curves on request. The 5 um element (code W) is the finer of the two published grades; choose it where misting nozzles, precision valves or instruments need cleaner air than the 40 um standard. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drain versions exist if you prefer operator-controlled or load-proportional draining. The gauge here is the embedded square type on the MPa scale, with psi and bar scales and an external round gauge available as options. Thread is NPT on this unit; PT is the catalogue standard and G (BSPP) is also orderable. No bracket is fitted - add one if the unit will not be piped rigidly. The regulator is the low-pressure type; its exact adjustment range is not published in our sheet, so confirm it with us. Because flow is published as curves rather than a single rating, ask us to verify this model 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, not as a single rated figure, so we do not quote a flow number for this model. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet curves on request before you order.
The A in the code means the bowl drains itself: collected condensate is expelled automatically, so the unit suits installations that run unattended or are awkward to reach. The same 300-size filter regulator can be ordered with a manual drain or a differential-pressure drain instead - just ask for the variant code.
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.