The AirTAC GFR300C08ALF3TK AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR300C08ALF3TK is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This size 300 unit is threaded NPT1/4 (1/4 in), built as the low-pressure regulator type, and fitted with an automatic drain that clears collected condensate from the bowl without manual attention. The standard 40 um filter element is installed, an embedded square gauge with bar scale is included, a reverse/check valve is fitted, and a mounting bracket comes with the unit. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the medium is compressed air.
This is a genuine AirTAC part. The GFR family runs from size 200 to size 600 with ports from 1/8 in to 1 in, and can be ordered with manual or differential-pressure draining, a 5 um filter element (code W), gauge scales in MPa, psi or bar, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and the sizing for your application before ordering.
| Model | GFR300C08ALF3TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Feeding filtered, regulated air to the taping heads and flap-fold cylinders on a case-sealing machine, with the automatic drain handling condensate carried over from humid plant air.
Conditioning the bench air feed to analyzers and pneumatic lab fixtures that need water- and particulate-free air held at a modest, stable pressure rather than full line pressure.
Supplying the diverter and gate cylinders on a conveyor sorting line, where the fitted check valve protects the downstream circuit against backflow and the bar-scale gauge gives operators a local pressure readout.
Choose the size and port against the air demand of the circuit: this unit is size 300 with a 1/4 in NPT port, and larger sizes in the family step up in port and flow capacity. Because flow is published as curves and not as a single rating, let us check the sizing against your application before you order. The real decode choices on this family are: drain type (automatic as fitted here, or manual, or differential-pressure), filter element grade (40 um standard, 5 um with code W), gauge scale (bar on this unit; MPa and psi are available), thread (PT is the catalogue standard, with G and NPT as order options - NPT on this unit), and the low-pressure regulator type selected here. Note that the adjustment range of the low-pressure type is not published in the material we hold, so confirm your target set pressure with us before ordering.
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, not as a single rated figure, and we will not quote an invented number. Send us your air demand and line conditions and we will confirm the flow and the sizing from the datasheet before you order.
This unit is built on the low-pressure regulator variant, selected where lower set pressures are needed. The exact adjustment range of the low-pressure variant is not published in the material we hold, so tell us your target pressure and we will confirm suitability from the datasheet. Everything else in the code decodes normally: NPT1/4 port, automatic drain, 40 um element, square bar-scale gauge, reverse/check valve and mounting bracket.
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.