The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 Square Gauge psi 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: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration has PT1/2 ports, a polycarbonate bowl with manual drain, the standard 40 um filter element, an embedded square gauge scaled in psi, and a reverse (check) valve fitted; no mounting bracket is included (code J). Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range with manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR300 series. G-series filter regulators are available in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, in PT, G (BSPP) or NPT thread, with manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, and MPa, psi or bar gauge scales. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 Square Gauge psi |
|---|---|
| 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 | 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 | 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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) |
Filtered, regulated air to the clamp and tool-change circuits of a CNC machining center, with the fitted check valve blocking reverse flow at the inlet and the psi gauge letting setters verify set pressure at a glance.
Conditioned air for diverters, stoppers and gripper cylinders on a bottling or carton-packing conveyor line, where the 40 um element and manual drain keep water and debris out of the directional valves.
Point-of-use conditioning at an assembly-plant air drop feeding pneumatic screwdrivers and air tools, with pressure set on the square psi gauge and the check valve protecting the drop from backflow in the header.
The 300 size with PT1/2 ports suits circuits plumbed at 1/2 inch; step up to 400 or 600 for larger flow demand, or down to 200 for compact points of use. The M code means manual drain: an operator opens the bowl drain to expel collected condensate, which suits attended machines - automatic (A) and differential-pressure (blank) drain codes are available if unattended draining is needed. The 40 um element is the standard grade; specify W for 5 um finer filtration. The embedded square gauge on this unit reads in psi; MPa and bar scales are order options, as is an external round gauge. Thread is PT as standard, with G (BSPP) and NPT as catalogue options, and a bracket can be ordered if mounting is required. Flow 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 GFR300 series as curves, not as a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the datasheet figures for this exact model on request.
The M code in GFR30015MJF2K means the bowl drain is opened by hand to expel collected condensate, which suits machines that are attended regularly. The same GFR300 size in PT1/2 is also available with automatic (A) or differential-pressure (blank) drain codes - ask us to quote the variant.
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.