The AirTAC GFR300-15ALF1TK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 PT1/2" ports, a automatic 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 GFR300-15ALF1TK is a GFR-series filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air through a 40 um filter element, then regulates downstream pressure, and it is the low-pressure type for applications that operate below the standard regulator range. This configuration is built with a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, an embedded square gauge scaled in MPa, and a reverse/check valve fitted to hold the set pressure against backflow.
This is a genuine AirTAC part from the GFR300 size class. The G-series spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT threads, drain types, filter grades and gauge scales, and we confirm flow and datasheet figures on request because flow is published as curves rather than a single rating.
| Model | GFR300-15ALF1TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Filtering and regulating the air feeding a packaging machine's cylinders and sealers, with the automatic drain keeping condensate out of the valves during continuous shifts.
Supplying cleaned, regulated air to conveyor diverters and stopper cylinders, with the reverse/check valve holding the set pressure if the upstream supply dips.
Conditioning the air feeding laboratory automation and sample-handling actuators, where the 40 um element and stable low-pressure regulation protect sensitive pneumatic components.
Choose the size step (200/300/400/600) to match your port and expected flow, then pick the thread your pipework needs - PT is the standard, with G and NPT as order options, and this unit is built with NPT1/2. Where a bowl is fitted, decide between differential-pressure drain (the default), automatic drain for unattended condensate removal, or manual drain; this unit carries the automatic drain. Filter grade is 40 um standard with 5 um (code W) available where finer filtration is needed. Regulator-equipped units offer a square gauge (MPa, psi or bar scale) or an external round gauge, and a reverse/check valve can be fitted. Flow is published as curves rather than a single rated figure, 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. The reflux valve permits reverse flow 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 no single number can be quoted honestly. Send us your line pressure and flow requirement and we will confirm the sizing from the datasheet on request before you order.
It decodes as: A = automatic drain, blank filter grade = 40 um standard element, L = low-pressure regulator type, blank bracket = bracket included, F1 = embedded square gauge with MPa scale, and K = reverse/check valve fitted. Thread is T = NPT on the 1/2 in port.
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.