The AirTAC GFR300-15 AirTAC Filter Regulator PT1/2, 5 um, Auto Drain is a genuine G-series filter regulator: water separation, 5 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 one body. This 300-size unit has a 1/2 in PT port, an automatic drain that expels collected condensate without manual attention, a 5 um filter element for finer filtration than the standard 40 um grade, an embedded square gauge reading in psi, a reverse/check valve, and a mounting bracket. It is a low-pressure type regulator, and the polycarbonate bowl lets you see the condensate level at a glance. Maximum working (inlet) pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part in the GFR300 series. The GFR family spans sizes 200 to 600 with ports from 1/8 to 1 in, a choice of drain (differential-pressure, automatic or manual), 40 um standard or 5 um (W) filtration, gauge and thread options (PT standard; G and NPT available to order), and standard or low-pressure regulation. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15 AirTAC Filter Regulator PT1/2, 5 um, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Automatic 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". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Supplies clean, regulated low-pressure air to clamp and fixture actuators on a machining centre, with the 5 um element protecting directional valves from particulate and the automatic drain keeping condensate out of the circuit.
Feeds cylinders and diverters on a cartoning or wrapping conveyor, where the automatic drain handles moisture from a long compressed-air run and the check valve holds downstream pressure if the supply dips.
Installed at the drop from a plant air header to a filling and capping section, combining water and particle removal with low-pressure regulation sized on a 1/2 in PT connection.
Size and port: the 300 frame with a 1/2 in PT port suits lines supplied at 1/2 in; step up to size 400/600 or down to 200 depending on the flow your circuit needs - we can check the published flow curves against your demand. Drain: the automatic drain here discharges condensate on its own; choose manual or differential-pressure drain if you prefer operator-controlled or pressure-differential dumping. Filtration: this unit carries the 5 um (W) element; the standard grade is 40 um if finer filtration is not required. Gauge: the embedded square gauge is fitted with a psi scale; MPa and bar scales and an external round gauge are alternatives. Thread: PT is the standard; G (BSPP) and NPT are order options. A mounting bracket is included.
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 figure, so there is no one number we can honestly quote. Send us your application details and we will confirm the relevant flow and datasheet figures for you before you order.
The automatic drain expels collected condensate from the polycarbonate bowl on its own, so the unit suits installations that are not checked daily. Manual drain is the alternative if you prefer operator-controlled dumping; differential-pressure drain is the catalogue default. This unit is a low-pressure type regulator with a 5 um element, a square psi gauge and a reverse/check valve fitted.
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.