The AirTAC GFR300C08MLJC3TK AirTAC Low-Pressure Filter Regulator NPT1/4 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 GFR300C08MLJC3TK is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This 300-size unit is threaded NPT1/4 (1/4 in) and is the low-pressure regulator type, so it is aimed at circuits that hold a reduced working pressure rather than full line pressure. The bowl is drained manually, the standard 40 um filter element is fitted, and a round gauge with a bar scale is included. A reverse/check valve is built in, and no mounting bracket is supplied with this configuration.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 in to 1 in, and options include automatic or differential-pressure drains, a finer 5 um element (code W), gauge scales in MPa, psi or bar, and G (BSPP) or NPT threads alongside the PT standard. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The exact regulation range of the low-pressure type is not published in our data, so we confirm it on request. Flow is published as curves rather than a single rating - ask us to confirm sizing from the datasheet before you order.
| Model | GFR300C08MLJC3TK AirTAC Low-Pressure Filter Regulator NPT1/4 |
|---|---|
| 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 air-jet and stenter sections on a textile finishing line that runs at reduced working pressure, where the low-pressure regulator type holds the circuit steady and the 40 um element keeps water and scale out of the jets.
Supplying clean, reduced-pressure air to leak-test benches and laboratory rigs, where a stable low pressure and particulate-free air are needed for repeatable test results and the built-in check valve holds the setting between cycles.
Running clamp and hold-down cylinders on a bottling or canning conveyor, where the filter stage removes condensed water from the shop air and the low-pressure regulator holds the gentle clamping pressure the containers need.
Start with size and port against the flow your line needs: this unit is size 300 with a 1/4 in NPT port, and the larger 400 and 600 sizes step up in port and flow capacity. Drain type is a real choice - manual as fitted here (you open the drain yourself), or automatic or differential-pressure if you want the bowl cleared without attention. Filter grade is 40 um standard; specify code W for the 5 um element when finer particulate control matters. Gauges can be ordered with MPa, psi or bar scales; this unit carries a round bar-scale gauge. Thread is NPT here, while PT is the AirTAC standard and G (BSPP) is also available. Brackets are optional and this configuration has none. Because flow is published as curves rather than a single rated figure, send us your application details and we will confirm sizing from the datasheet 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 figure, so we do not quote a number on the page. Send us your inlet pressure, downstream demand and port requirements and we will confirm the flow and sizing from the datasheet on request before you order.
This configuration has a manually drained bowl: open the drain at the bottom of the bowl periodically to expel the collected water. If you would rather not do that, GFR units in this size can be ordered with an automatic drain or a differential-pressure drain instead - just specify it when ordering.
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.