The AirTAC GFR300C08LJF2WTK AirTAC Filter Regulator NPT1/4 5 um 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 GFR series combines water and particulate filtration with pressure regulation in a single body, so one size-300 unit cleans the air and sets the working pressure at the same time. This configuration, GFR300C08LJF2WTK, takes a 1/4 in NPT port, carries a 5 um filter element (code W), drains condensate by differential pressure, and is built as the low-pressure regulator type. It is supplied with the embedded square gauge scaled in psi, includes a reverse/check valve, has no mounting bracket, and uses a metal bowl. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR300 size sits in a family that runs from size 200 to 600, with ports from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um filtration, and gauge scales in MPa, psi or bar. AirTAC publishes flow for this series as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure for your application before you order.
| Model | GFR300C08LJF2WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| 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 pneumatic clamps and swing cylinders on a machining fixture that runs at reduced settings, with 5 um air protecting the clamp seals and the built-in check valve blocking backflow toward the upstream side.
A single filter-regulator point for the small cylinders and air jets on a cartoning or wrapping line, giving operators one psi-scale gauge to read and one drain point to service.
Conditioning supply air for analytical instruments, pneumatic sensors and lab automation that need clean 5 um air at a reduced setting on a 1/4 in NPT line.
Choose GFR300 when your line needs filtered, regulated air at a 1/4 in port; step up to size 400 or 600 for larger ports and higher demand, or down to 200 for compact points of use. Because AirTAC publishes flow as curves rather than one rated number, send us your demand and we will confirm the right size against the datasheet before ordering. The 5 um element (code W) gives finer protection than the 40 um standard, and the differential-pressure drain handles condensate in service without manual attention. This code is the L low-pressure regulator variant; its exact adjustment range is not published in our summary data, so confirm your secondary-pressure requirement with us. NPT is fitted here (PT is the standard thread, G and NPT are order options), the psi-scale square gauge is embedded, a reverse/check valve is included, and no mounting bracket is fitted with this code.
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 here. Send us your flow demand and working pressure and we will confirm sizing from the datasheet on request.
This code is the low-pressure regulator variant of the GFR300. Its exact adjustment range is not published in our summary data, so tell us the secondary pressure you need to set and we will confirm suitability with you before you order.
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.