The AirTAC GFR300C08ALJC2K AirTAC Filter Regulator PT1/4 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 AirTAC GFR300C08ALJC2K is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is threaded PT1/4 (1/4 in PT; G and NPT are order options), carries a 40 um filter element, and has an automatic drain that expels collected condensate from the polycarbonate bowl without manual bleeding. The regulator is the low-pressure type, a round gauge scaled in psi is fitted, and a reverse/check valve is included; no mounting bracket is supplied.
This is a genuine AirTAC part. The GFR300 sits in the 200/300/400/600 GFR size range, with port sizes from 1/8 to 1 in and drain, filter-grade, gauge, thread and bracket options across the series. 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 curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR300C08ALJC2K AirTAC Filter Regulator PT1/4 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) |
Filtering and regulating the supply to air cylinders and grippers on an assembly line, where the low-pressure regulator type and automatic drain keep a clamping or pick-and-place circuit supplied without daily bowl bleeding.
Conditioning air for stopper cylinders and diverters on a packaging conveyor: the 40 um element takes out water and particulate before they reach valve seals, while the regulator holds a steady downstream setting.
Feeding a bench-top pneumatic test rig or fixture, where the fitted round gauge gives a direct local reading in psi and the K code confirms a reverse/check valve is fitted on the unit.
Size the unit by port and flow: the 300 size with its 1/4 in PT port is the middle step of the GFR range (200/300/400/600, ports 1/8 to 1 in), so step up or down a size if your circuit's air demand sits outside what a 1/4 in supply comfortably carries. The decodable choices on this code are: automatic drain (A) versus manual (M) or differential-pressure (blank); 40 um standard element versus the 5 um W option; round psi gauge fitted (C2) with MPa or bar scales available; PT thread as standard with G and NPT as order options; and no bracket (J), with brackets available in the series. The L code makes this the low-pressure regulator type; its exact adjustment range is not published, so we confirm it on request. Flow itself is published as curves, not a single rating - ask us to check the curve against your application before you order.
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 number, so we do not quote a figure here. Send us your application's air demand and working pressure and we will confirm the sizing against the datasheet curve before you order.
The L code makes this the low-pressure version of the GFR300 regulator; its exact adjustment range is not published in our data, so we confirm it on request. The A code means the bowl drains automatically - collected condensate is expelled without manual bleeding. Manual (M) and differential-pressure drain variants exist across the series.
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.