The AirTAC GFR300C15ALF2WT 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 GFR300C15ALF2WT is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This size 300 configuration carries a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), an automatic drain that ejects collected condensate without manual attention, a low-pressure regulator and an embedded square gauge scaled in psi. A metal bowl collects the separated water, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 to 1 in, and options include 40 um standard or 5 um filtration, manual, automatic or differential-pressure drains, MPa, psi or bar gauge scales, and PT, G or NPT threads - this unit is ordered in NPT. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as performance curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR300C15ALF2WT 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) |
Filtering and regulating the air feed to spray guns and booths on a paint line: the 5 um element and automatic drain keep water and particles out of the finish while the regulator holds the gun supply at the set pressure.
Conditioning the compressed-air ring main that feeds bench instruments and pneumatic test rigs in a laboratory, where the low-pressure regulator and 5 um grade suit sensitive apparatus and the automatic drain handles condensate in an unattended room.
Feeding filtered, regulated air to carton sealers and wrapping machines on a packaging conveyor line: the 1/2 in NPT connection suits the machine's main air inlet and the square psi gauge lets operators set and check line pressure at a glance.
Because the port step (1/8 to 1 in across sizes 200-600) tracks machine air demand, size the unit from the flow your line actually needs and step up a size if you run near capacity; we confirm curve figures against your application before you order. The remaining choices are all decodable from the code: the automatic drain on this unit suits unattended duty, with manual and differential-pressure drains available as alternatives; the 5 um element (code W) suits sensitive downstream equipment where the 40 um standard grade would not; the embedded square gauge is scaled in psi, with MPa or bar scales and an external round gauge as options; and PT is the standard thread with G and NPT as order options - this unit is NPT. The regulator here is the low-pressure type; its exact adjustment range is not published, so ask us to confirm it from the datasheet.
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 GFR flow as performance curves, not as a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and sizing data for the GFR300C15ALF2WT from the datasheet.
The code selects the low-pressure regulator type, intended for circuits that run at lower set pressures than the standard version; its exact adjustment range is not published, so we confirm it on request. The gauge code selects the embedded square gauge scaled in psi, with MPa or bar scales and an external round gauge available as options.
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.