The AirTAC GFR300-15T AirTAC Filter Regulator, NPT 1/2 in 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 GFR300-15T is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This unit is fitted with a 1/2 in NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and an embedded square pressure gauge scaled in MPa. As a standard-type regulator it covers an adjustment range of 0.15-0.9 MPa (20-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi), and it operates in temperatures from -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 series is available in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, G (BSPP), NPT or PT threads, manual, automatic or differential-pressure drains, an optional 5 um element, and gauge scale choices of MPa, psi or bar. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15T AirTAC Filter Regulator, NPT 1/2 in |
|---|---|
| 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 | 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 | 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. |
|---|---|
| 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. |
| J | Supplied without bracket. |
| (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. |
| (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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Installed on the 1/2 in NPT air drop feeding a CNC machining centre, the GFR300-15T strips water and chips-laden particulate from the shop air and holds a steady regulated pressure to the machine's pneumatic valves and clamps, with the automatic drain handling condensate between shifts.
Mounted at the inlet of a packaging conveyor's pneumatic panel, this filter regulator cleans the compressed air feeding the box-forming and sealing cylinders and lets technicians set the working pressure from the square MPa gauge, keeping actuation consistent across the line.
Used at the head of an assembly cell's air preparation manifold, the GFR300-15T conditions the factory ring-main supply - removing moisture and 40 um-and-larger particles and regulating pressure downstream - so every tool and fixture on the cell receives clean, set-point air.
Start with the size and port: the 300 frame with a 1/2 in NPT port suits lines whose tubing and fittings are already 1/2 in NPT; step up to 400 or 600 for larger supply lines, or down to 200 for compact drops. Choose the drain to match site practice - the automatic drain on this unit suits unattended or hard-to-reach installations, while manual and differential-pressure drains are available where periodic checking is preferred. The 40 um element is the standard grade; specify the 5 um (W) option where finer particulate removal is needed. The embedded square gauge is scaled in MPa here, and psi or bar scales plus an external round gauge can be ordered. PT is the standard thread; G (BSPP) and NPT are order options - this unit is the NPT version. A mounting bracket is optional (this configuration is supplied without one).
Because flow is published as curves rather than a single rating, we do not quote a rated flow number. 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. 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 rather than a single rated figure, so we do not quote a rated flow number, Cv or SCFM. Tell us your application and required flow, and we will confirm the sizing against the datasheet on request before you order.
The A in the code GFR300-15T specifies an automatic drain, which ejects collected condensate from the bowl without anyone having to open it - useful for unattended or hard-to-reach installations. The same 300-size filter regulator can also be ordered with a manual drain or a differential-pressure drain if your maintenance routine prefers 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.