The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2 Auto Drain 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 300-size body with a PT1/2 (1/2 in) port. This configuration carries a 40 um standard filtration element, an automatic drain that expels collected condensate without manual attention, and a fitted reverse/check valve. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and this unit is supplied with a round pressure gauge reading in psi. 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 GFR filter-regulator family is available in sizes 200, 300, 400 and 600 with a choice of ports, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um (W) filtration, gauge style and scale, and bracket options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT 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 — round, 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 0.15 - 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). |
| C | Gauge shape: Round. 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) |
Installed at the drop feeding an assembly cell, the GFR300-15 cleans moisture and particles from the shop-air main and holds a set downstream pressure for the cell's air tools and actuators, with the automatic drain keeping the bowl clear between shifts.
Mounted ahead of the valve stack on a conveyor line, this unit filters the supply and regulates the pressure feeding pneumatic clamps and diverters, so cylinder forces stay consistent as the main header pressure wanders.
Fitted on the air inlet of a CNC machining centre, the GFR300-15 removes water and debris before they reach the machine's air-operated components and regulates the supply pressure the machine builder specifies, with the psi gauge giving operators a local reading.
Choose the GFR300-15 when your line needs combined filtration and regulation at a 1/2 in PT port. The 40 um element is the standard grade for general plant air; if finer filtration is required, the W variant with a 5 um element is available in the same family. The automatic drain on this unit suits unattended or hard-to-reach installations; manual and differential-pressure drain versions exist if you prefer operator-controlled or pressure-differential draining. The fitted round gauge reads in psi; embedded square gauges with MPa, psi or bar scales are the alternative. PT is the standard thread, with G (BSPP) and NPT available to order. A mounting bracket is not included with the J code but is available on other variants.
Before ordering, have us confirm sizing: flow for this family is published as curves, not a single rated number, so we check the datasheet against your required flow and pressure drop rather than quoting a figure.
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. Tell us your required flow and working pressure and we will confirm the figures from the datasheet for this 300-size, PT1/2 unit before you order.
The A in the code GFR30015AJC2K means the bowl drains condensate automatically, which suits installations that are not checked daily. The GFR300 family is also available with a manual drain (M) or the differential-pressure drain (blank), which drains when the pressure drop across the filter rises. The 40 um element on this unit is the standard grade; the W code gives a 5 um element.
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.