The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 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 AirTAC GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit carries a PT1/2 (1/2 in) PT thread, a 40 um standard filter element, and a manual drain bowl in polycarbonate. It is the low-pressure type, so it is intended for circuits that run at reduced working pressure rather than full line pressure. The built-in square gauge is scaled in psi, and a reverse/check valve is fitted to hold downstream settings when upstream supply is lost.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, drain, filter-grade, gauge-scale and thread options. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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, 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". |
| 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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) |
Feeding filtered, regulated air to the clamping cylinders and pneumatic actuators on a machining centre, where the low-pressure type suits circuits run below full line pressure and the psi gauge lets operators verify setpoints at a glance.
Conditioning the air supply to the valve manifold driving bag-form and sealing jaws on a packaging machine, with the 40 um element protecting valve spools and the reverse/check valve holding downstream pressure through supply dips.
Serving the point-of-use drop on an assembly line where air tools and pneumatic screwdrivers run at a reduced regulated pressure, with the manual drain bled at shift start and the psi square gauge giving a clear local reading.
Size the unit by stepping up from 300 if your circuit may need more flow than this port class delivers, or down to 200 for compact lines; the port step runs 1/8 in to 1 in across the family. This unit is the low-pressure type - confirm the exact regulation range against your working pressure with us before ordering, since the low-pressure range is not published as a single figure. The manual drain needs periodic bleeding by an operator; choose the automatic or differential-pressure drain variant if the installation is unattended. The 40 um element is the standard grade; specify W for the 5 um option where finer filtration is needed. The square gauge here reads in psi; MPa and bar scales are available, and an external round gauge is optional. Thread is PT as standard, with G (BSPP) and NPT as order options; this J-coded unit ships without a mounting bracket, so add the bracket variant if you panel-mount.
Because flow is published as curves and not a single rating, ask us to confirm sizing against your application 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 l/min or SCFM figure. Tell us your application and we will confirm the datasheet flow curve and sizing on request before you order.
The L code means this is the low-pressure regulator variant, intended for circuits run below full line pressure; its exact regulation range is not published as a single figure, so confirm it with us against your working pressure. The M code is the manual drain: an operator bleeds collected water from the polycarbonate bowl periodically, which suits attended stations; choose the automatic or differential-pressure drain variant for unattended installations.
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.