The AirTAC GFR30008LJF2TK AirTAC 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 PT1/4" 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 GFR30008LJF2TK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/4 in NPT ports, a differential-pressure drain that bleeds condensate as the pressure drop across the element builds, a 40 um standard filter element, and a low-pressure regulator suited to circuits that run well below standard line pressure. An embedded square gauge reading in psi is fitted, and a reverse/check valve holds downstream pressure when the upstream supply is lost. No mounting bracket is included with this code.
This is a genuine AirTAC part in the GFR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G and NPT thread options. Filter grade, drain type, gauge scale and reverse-valve fitment can all be selected by code. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures against your application before ordering.
| Model | GFR30008LJF2TK AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 08 | Port size PT1/4". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a machining or assembly cell where pneumatic clamps and swing cylinders hold workpieces, this filter regulator cleans the supply air and holds a steady, reduced working pressure so clamp force stays repeatable from cycle to cycle. The check valve keeps the circuit from venting if the main supply drops mid-cycle.
On a laboratory or pilot-plant bench that runs air cylinders, actuators or low-pressure process tests, the low-pressure regulator type gives finer control in the reduced-pressure region, while the 40 um element and differential drain keep water and pipe scale out of sensitive instruments.
On a cartoning or bagging machine that feeds low-pressure air to sealing bars, vacuum generators or sorting jets, this unit filters the shop air and regulates it to the pressure the machine was set up for. The psi gauge gives operators a direct readout, and the differential drain handles condensate without daily manual blows.
Start with the port step: this code is the 300 size with 1/4 in NPT threads; step up to 400 or 600 if your line needs larger ports and more flow, or down to 200 for compact circuits. The L in the code marks the low-pressure regulator type, chosen when the working pressure sits below what a standard unit is set for. The drain here is differential-pressure, the default: it discharges condensate automatically as the pressure drop builds, with no operator attention; a manual-drain (M) or fully automatic-drain (A) version can be ordered instead. The filter element is the 40 um standard grade; specify W for the 5 um option if downstream equipment needs finer filtration. The gauge is the embedded square type reading psi (MPa and bar scales are available, and an external round gauge is optional), and K fits a reverse/check valve. J means no bracket is supplied, so plan your mounting panel accordingly. Thread is NPT here; PT is the catalogue standard and G is also orderable. Because flow is published as curves rather than a single rating, send us your flow and pressure requirements 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. The reflux valve permits reverse flow 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 flow figure here. Tell us your inlet pressure, set pressure and required air consumption, and we will confirm the correct size from the datasheet curves on request before you order.
L marks the low-pressure regulator type, intended for circuits whose working pressure sits below standard line pressure. K means a reverse/check valve is fitted, so downstream pressure is held if the upstream supply is lost. This unit has a differential-pressure drain (the default, no letter in the code): condensate collected in the PC bowl is discharged automatically as the pressure drop across the filter element builds, with no manual draining required.
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.