The AirTAC GFR300C15ALF1WTK AirTAC Filter Regulator NPT1/2 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 GFR series combines filtration and pressure regulation in a single body: air passes a filter element that strips water and particulate, then flows through a regulator that sets the downstream pressure. This unit, GFR300C15ALF1WTK, is the size 300 body with a 1/2 in NPT port. It carries the W-coded 5 um filter element (40 um is the standard grade), an automatic drain that expels collected condensate from the metal bowl without manual intervention, and the L-coded low-pressure regulator type. An embedded square gauge on the MPa scale is fitted, a reverse (check) valve is built in, and the mounting bracket is included. 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 family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and can be ordered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, an embedded square gauge or an optional external round gauge in MPa, psi or bar scales, with or without a reverse valve, and with PT, G (BSPP) or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C15ALF1WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
On packaging and assembly machines where pneumatic clamps must close gently, the low-pressure regulator type holds a reduced setting while the 5 um element keeps debris out of the clamp valves.
Supply filtered, regulated air to filler and capper actuators on a bottling line; the automatic drain clears condensate from the metal bowl without an operator having to visit the machine.
Feed stoppers, diverters and pusher cylinders on a distribution conveyor with clean, regulated air at a stable reduced pressure from one compact filter regulator unit.
Choosing within GFR comes down to a few decodable decisions. Step up through sizes 200, 300, 400 and 600 to match port size and flow demand - this unit sits at size 300 with a 1/2 in NPT port. Drain type matters: the automatic drain here suits unmanned or hard-to-reach installations, while manual and differential-pressure drains are the other catalogue options. Filter grade is 40 um standard or 5 um (W) for finer protection of downstream components. Gauges are available in MPa, psi or bar scales, and the thread can be ordered as PT (standard), G (BSPP) or NPT. A bracket is included with this unit, and the L code selects the low-pressure regulator type.
Because AirTAC publishes flow only as curves and not as a single rated figure, we do not quote a flow number here. Send us your application details and we will confirm sizing, the low-pressure adjustment range and the full datasheet on request.
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. Tell us your application and we will confirm the flow curve and the full datasheet for this size 300, 1/2 in unit on request.
The A in the code selects the automatic drain, which expels collected condensate from the metal bowl on its own - useful for unmanned cells or units mounted out of easy reach. Manual and differential-pressure drains are the other catalogue options if you prefer operator control.
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.