The AirTAC GFR30015ALF3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 5 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 GFR30015ALF3WTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is fitted with a 5 um filter element (the finer of the two published grades), an automatic drain that expels collected condensate without manual attention, an embedded square gauge reading in bar, a reverse/check valve that holds downstream pressure when the supply is lost, and a mounting bracket. The port is 1/2 in NPT thread. It is a low-pressure type, intended for circuits that run below the standard regulator range, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um filtration, gauge scale options and G/NPT thread variants. Flow is published by AirTAC as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR30015ALF3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding filtered, regulated air to the tool-change clamps and pneumatic actuators on a machining centre, where the 5 um element protects the directional valves and the check valve holds clamp pressure if the shop supply drops.
Supplying regulated air to the stop gates, lifters and diverters on a bottling or carton conveyor, with the automatic drain handling condensate on a line that runs unattended across shifts.
Conditioning the air at individual drop points on a weaving-floor ring main, where the low-pressure type regulator suits the gentler settings these machines run at and the bar gauge lets operators verify supply at a glance.
Sizing a GFR starts with the port step: this unit is size 300 with a 1/2 in NPT port, one step up from the 3/8 in size-300 option, so choose it when your line is plumbed at 1/2 in or when you want headroom on the flow curve. The 5 um element (code W) suits air-prep ahead of valves, cylinders or instruments that tolerate less particulate than the 40 um standard element. The automatic drain is the right choice where the unit sits in an inaccessible spot or where someone will not walk the line daily; manual and differential-pressure drains remain available on other configurations. The square gauge reads in bar; MPa and psi scales and an external round gauge are order options. G (BSPP) and NPT threads are catalogue options ordered by suffix, with PT as the standard thread. A bracket is included with this code; J-coded variants omit it. Because AirTAC publishes flow as curves and not 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. The reflux valve permits reverse flow 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 here. Tell us your application and we will confirm the datasheet flow curve and sizing for the 1/2 in size-300 unit before you order.
The A in the code selects the automatic drain, which expels collected condensate on its own so the polycarbonate bowl does not need daily attention. Manual (M) and differential-pressure (blank) drain versions of the same size-300 filter regulator are available in the range if you prefer those.
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.