The AirTAC GFR300C15AF3T AirTAC Filter Regulator NPT1/2, 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 See datasheet ports, a differential-pressure 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 GFR300C15AF3T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This 300-size unit is ported 1/2 in NPT, drains condensate automatically, carries the standard 40 um filter element, and includes an embedded square gauge scaled in bar. The standard regulator covers a 0.15-0.9 MPa (20-130 psi) setting range, maximum inlet pressure is 1.0 MPa (145 psi), the polycarbonate bowl suits -5 to 70 C non-freezing service, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR series spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options include manual or differential-pressure drains, a 5 um element (code W), MPa, psi or bar gauge scales, G (BSPP) or NPT threads in place of the PT standard, and an external round gauge. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures and the datasheet for your application.
| Model | GFR300C15AF3T AirTAC Filter Regulator NPT1/2, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
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. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (blank) | No reverse-flow valve (the default). |
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Feeding tool clamps, chip-blow nozzles and pallet-clamp cylinders on a CNC machining center: the 40 um element strips water and swarf-laden condensate from the shop air main while the regulator holds a steady setpoint to the clamping circuits, with the automatic drain keeping the bowl clear through multi-shift running.
Supplying carton sealers, case packers and wrapper cylinders along a bottling-plant conveyor: clean, regulated air keeps the stroke timing of the packaging heads consistent from start to end of shift, and the 1/2 in NPT port suits the line's main air drop.
Regulating the shop-air drops in a truck fleet maintenance bay where impact wrenches, air ratchets and tire inflation stations hang off a shared compressor ring main: the filter stage protects the tools from moisture carryover and the gauge lets technicians set and verify bay pressure at a glance.
Choose the size by port and flow demand: 200 covers 1/8-1/4 in ports, 300 covers 3/8-1/2 in, 400 covers 3/4 in and 600 covers 1 in, with larger sizes flowing more. Drain type is a real choice: automatic (as fitted here) ejects condensate without attention, manual needs a periodic press, and the differential-pressure drain discharges only when the element loads up. Filter grade is 40 um standard or 5 um with code W; gauge scales come in MPa, psi or bar; thread is PT as standard with G (BSPP) and NPT as order options; a bracket can be included or omitted (code J). Flow for this series is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm the right size against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm from the datasheet whether the 300 size at 1/2 in NPT suits your application.
The A in this code fits the automatic drain, which ejects collected condensate without operator attention. The series also offers manual drain (code M) and the differential-pressure drain (blank), which discharges only as the element loads up. The regulator setting range depends on drain type: 0.15-0.9 MPa (20-130 psi) with automatic or differential-pressure drain, and 0.05-0.9 MPa (7-130 psi) with manual drain.
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.