The AirTAC GFR30015ALF2WTK AirTAC Filter Regulator NPT 1/2 in 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 GFR30015ALF2WTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for a 1/2 in NPT port, carries a 5 um filter element (the finer of the two published grades), and drains condensate automatically, so the bowl does not depend on someone opening a manual drain. It is the low-pressure regulator type, fitted with an embedded square gauge reading in psi, and includes a reverse/check valve so downstream pressure is held if the supply side drops. The polycarbonate bowl suits the non-freezing -5 to 70 C working range, with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, PT, G and NPT threads, three drain types, 40 um and 5 um filtration, standard and low-pressure regulation, and gauge choices. Flow for this series is published 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 | GFR30015ALF2WTK AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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, psi 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. |
| 2 | Gauge scale: psi. 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 a bench or floor pneumatic press where the downstream circuit runs at reduced pressure and needs clean, moisture-picked air; the low-pressure regulator type and 5 um element protect the press valve and cylinder, and the automatic drain keeps the bowl clear through repeated cycles.
Conditioning the air line to a spray or coating station, where water and fine particulate in the supply cause finish defects; the 5 um filtration and regulated, gauge-monitored pressure give the operator a stable setpoint, and the check valve holds the setting if the header dips.
Supplying a packaging machine's valve manifold and pick-and-place cylinders, where several actuators share one conditioned drop; the 1/2 in NPT port matches the machine's supply connection, the automatic drain removes condensate from continuous running, and the psi gauge lets maintenance verify setpoint at a glance.
Size 300 with a 1/2 in NPT port is the mid-range step in the GFR family; step up to size 400/600 or down to size 200 according to the flow your line needs, and match the port to your existing pipework. This unit is the low-pressure regulator type, so it suits circuits that must not see standard-range setpoints; the exact adjustment range for the low-pressure type is not published as a single figure, so confirm it with us against your setpoint. The 5 um element (code W) is the finer published grade - choose it where downstream valves and cylinders need cleaner air than the 40 um standard. The automatic drain handles condensate without manual intervention; manual and differential-pressure drains are the alternatives in this family. The square gauge reads psi; MPa and bar scales and an external round gauge are the other published options. NPT is specified here; PT and G threads can be ordered. A mounting bracket is included. Because flow is published as curves rather than one rating, send us your application details and we will confirm sizing 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 the GFR300 series as curves, not as a single rated figure, so we do not quote a number here. Tell us your working pressure, setpoint and the flow your circuit needs, and we will confirm the datasheet curve figures for this exact configuration before you order.
The L code in GFR30015ALF2WTK selects the low-pressure regulator type, intended for circuits that operate below standard-range setpoints. The exact adjustment range of the low-pressure type is not published as a single figure, so confirm it with us against your required setpoint. Everything else about the decode is unchanged: 5 um filtration, automatic drain, square psi gauge, reverse/check valve fitted, bracket included, maximum inlet pressure 1.0 MPa (145 psi), and -5 to 70 C non-freezing operation.
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.