The AirTAC GFR300C08ALC2GK AirTAC Filter Regulator G1/4 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 GFR300C08ALC2GK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a G1/4 (BSPP) port, a 40 um filter element, an automatic drain that ejects collected condensate without manual attention, and the low-pressure regulator type for circuits that run well below full line pressure. It is fitted with an external round gauge scaled in psi and a reverse/check valve, includes a mounting bracket, has a metal bowl, and is rated for a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR300 series spans sizes 200 to 600 with ports from 1/8 to 1 inch, drain choices (differential-pressure, automatic or manual), a 5 um element option (code W), gauge scales in MPa, psi or bar, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR300C08ALC2GK AirTAC Filter Regulator G1/4 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. |
|---|---|
| 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) |
Supplying filtered, reduced-pressure air to pneumatic clamps and workholding fixtures on a CNC machining cell, with the check valve holding the downstream circuit if supply pressure dips.
Conditioning air to the sealing and tucking stations of a carton or bag packaging line that runs at reduced pressure, with the automatic drain keeping condensate out of downstream valves.
Feeding a laboratory test bench or pilot rig that needs clean, low-pressure air with a local psi readout and automatic condensate draining at the point of use.
Choose the size by port and flow: this unit is size 300 with a G1/4 port; step up to 400/600 or down to 200 as your line's air demand requires. Drain type matters: automatic (this unit) drains on its own, manual needs periodic bleeding, and the differential-pressure default drains only when the pressure drop builds. Filter grade is 40 um here; specify W for the 5 um option where finer particulate capture is needed. The round gauge is scaled in psi; MPa and bar scales and the embedded square gauge are alternatives. Thread is G (BSPP); PT is the standard thread and NPT is an order option. A bracket is included. This is the low-pressure regulator type; its exact adjustment range is not published in the material we hold, so confirm it with us if your set point is critical. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and full datasheet figures for this exact model on request.
The A in the code specifies an automatic drain, which ejects collected condensate by itself instead of waiting for a manual bleed. The same GFR300 body is also available with a manual drain or the differential-pressure default, so you can order the drain type that suits how the machine is attended.
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.