The AirTAC GFR300C15ALF2WK AirTAC Filter Regulator PT1/2 5um 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 GFR300C15ALF2WK is an AirTAC filter regulator: one body that strips water and particulate from compressed air and holds the downstream pressure at a set point. This configuration is size 300 with a PT1/2 (1/2 in) PT thread, the 5 um filter element (code W, against the 40 um standard), an automatic drain that discharges collected condensate on its own, and the low-pressure regulator type. The embedded square gauge is fitted with a psi scale, a reverse/check valve is fitted, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi); working temperature is -5 to 70 C, non-freezing; the size 300 bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR300 sits in a range that spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options that include G (BSPP) or NPT threads, manual or differential-pressure drains, 40 um or 5 um elements, MPa, psi or bar gauge scales, and a reverse/check valve. Flow for this series 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 | GFR300C15ALF2WK AirTAC Filter Regulator PT1/2 5um 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) |
On a carton sealing or shrink-wrap conveyor, this unit filters the supply to 5 um and holds a low set pressure for the clamp and hold-down cylinders, while the automatic drain clears condensate through long shifts without an operator bleeding the bowl.
At an assembly bench or small press cell running low-pressure air cylinders on delicate parts, the regulator holds a gentle set point, the 5 um element protects downstream valve seals, and the psi gauge gives operators a direct readout at the station.
In an electroplating or wash line where low-pressure air agitates baths or actuates lift mechanisms, the filter regulator conditions the supply at the tank, the automatic drain handles moisture near the process, and the fitted reverse/check valve blocks reverse flow.
Every choice on this unit is decodable from the code. Size 300 with the PT1/2 port is the step to pick when your circuit is plumbed in 1/2 in and the size 300 flow curves cover your demand - we will check those curves with you, since AirTAC publishes flow as curves, not a single rating. The 5 um element (W) is the finer option over the 40 um standard, worth choosing where control valves or cylinders need cleaner air. The automatic drain suits duty where nobody bleeds the bowl; manual and differential-pressure drains are the alternatives in the range.
This is the low-pressure regulator type: the exact adjustment range for it is not published in the sheet we work from, so confirm your set point with us before ordering. The fitted square gauge reads in psi, with MPa and bar scales and an external round gauge available as alternatives. PT is the standard thread; G (BSPP) and NPT are order options. Mounting bracket included.
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 GFR300 as curves, not a single rated number, so we do not quote a l/min or SCFM figure. Send us your line pressure, set point and the cylinders or tools you are feeding, and we will confirm the sizing from the datasheet curves before you order.
This unit is the L (low-pressure) type rather than the standard GFR300. The exact adjustment range for the low-pressure type is not published in the sheet we work from, so tell us the set pressure your circuit needs and we will confirm suitability from the datasheet. Maximum inlet pressure remains 1.0 MPa (145 psi), and the fitted square gauge reads in psi.
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.