The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 5um Auto Drain 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 GFR300-15T is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is the size-300 unit with a 1/2 in NPT port, 5 um filtration (the finer W grade), an automatic drain that ejects collected condensate without operator attention, an embedded square pressure gauge scaled in MPa, a fitted reverse/check valve that holds the set pressure if the upstream supply drops, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl keeps the condensate level visible at a glance.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of 40 um standard or 5 um filtration, differential-pressure, automatic or manual drains, gauge scales in MPa, psi or bar, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 5um Auto Drain |
|---|---|
| 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 | 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 | 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 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 tool-change clamps and pneumatic actuators on a machining centre: the 5 um element protects direction valves from particulate and the regulator holds a steady set pressure, with the automatic drain clearing condensate through shift changes.
Supplying diverters, stoppers and pusher cylinders on a bottling or carton packaging conveyor, where the check valve keeps the set pressure stable during brief plant-air dips and the automatic drain suits an unattended line.
Conditioning air ahead of spray guns and air-assisted pumps in a finishing booth: the 5 um grade reduces water and particle carry-over toward the finish, and the regulator lets the booth set its own working pressure below the main header.
Start with the port and size step: this is the size-300 body on a 1/2 in NPT thread, one step up from the size-200/1/4 in class, so choose it when your line volume sits between the small and large frames. Because flow for the G-series is published as curves rather than a single rating, ask us to confirm the curve against your required flow before ordering. On filtration, 40 um is the standard element and 5 um (this unit, code W) suits finer downstream needs; on drainage, automatic (this unit) needs no operator attention, while manual and differential-pressure drains are available. The embedded square gauge here reads in MPa, with psi or bar scales and an external round gauge as options. PT is the standard thread; G and NPT are catalogue options ordered by suffix, and a no-bracket variant (code J) exists if you mount differently.
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, not as a single rated figure, so we do not quote one number. Send us your required flow and working pressure and we will confirm the datasheet curve and correct sizing for your application on request.
The A in the code GFR30015AF1WTK selects the automatic drain, which ejects collected condensate by itself and suits unattended installations. The GFR family also offers a manual drain (code M) and the differential-pressure drain as the default, and the same drain choice applies across the filter-bearing G-series units.
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.