The AirTAC GFR300-15T 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR300-15T is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the 300 size with a 1/2 in NPT port, a manual drain bowl in polycarbonate, a 40 um standard filter element, and the low-pressure regulator type. A square pressure gauge is fitted and a reverse (check) valve is included, so downstream pressure is held if the supply drops. The maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR300 series is one of four sizes (200/300/400/600) with port sizes from 1/8 to 1 inch, and options include automatic or differential-pressure drains, a 5 um element, G or NPT threads and different gauge scales. Flow figures for this series are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator, NPT1/2, Low Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure 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. |
| 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) |
On a CNC fixture line, this unit filters the shop air feeding the clamping cylinders and holds a steady, lower regulated pressure so parts are gripped consistently without over-clamping, while the check valve holds clamp pressure if the main supply dips.
In a paint or coating booth, the low-pressure regulator type supplies atomizing air at a gentle, repeatable setting, and the 40 um element plus water removal keeps moisture and debris out of the nozzles; the manual drain is bled at shift start.
Along a bottling line, this unit conditions and regulates the air feeding pusher and diverting actuators; the square MPa gauge lets line staff see supply at a glance, and the 1/2 in port serves the higher air demand of a busy conveyor section.
Size and port: the 300 series with a 1/2 in NPT port suits lines where larger air demand calls for a bigger port - step up to the 400 or 600 size if the flow curve needs more headroom. Drain: this unit has a manual drain, so someone must bleed the bowl periodically; choose an automatic or differential-pressure drain variant if the installation is unattended. Filter grade: the fitted 40 um element is the standard grade; specify the W variant for 5 um if downstream equipment needs finer filtration. The square gauge is fitted with an MPa scale (psi and bar scales are available), the reverse/check valve is included, and no mounting bracket is supplied with this code. Thread: PT is the standard; G (BSPP) and NPT are catalogue options ordered by suffix, as on this T-coded unit. Flow for this series is published as curves, not a single rating, 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, not as a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curve and sizing for the 300 size at your pressure on request before you order.
The manual drain (code M) means collected water is released by opening the drain by hand, so plan a routine bleed interval - automatic and differential-pressure drain variants exist if you need unattended draining. The fitted reverse (check) valve lets air flow downstream but blocks backflow, helping hold downstream pressure if the supply is interrupted.
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.