The AirTAC GFR300-08LJC2TK AirTAC Filter Regulator NPT1/4 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 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body. This unit, GFR300-08LJC2TK, is the size 300 low-pressure type with a 1/4 in NPT port, a 40 um filter element and a differential-pressure drain that clears collected condensate as the pressure differential across the element rises. It is fitted with a round pressure gauge reading in psi and a built-in reverse (check) valve, and it is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, manual or automatic drain options, a 5 um element option (code W) and MPa, psi or bar gauge scales. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because rated flow is published only as curves, we confirm datasheet and sizing figures on request.
| Model | GFR300-08LJC2TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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 — round, 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). |
| C | Gauge shape: Round. 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 machining fixtures, this filter regulator conditions the 1/4 in supply feeding clamp cylinders: the 40 um element keeps moisture and fine particulate out of the clamping circuit while the low-pressure regulator type sets the working pressure the fixture was designed around.
On carton-sealing and case-packing lines, the GFR300-08LJC2TK filters and regulates the 1/4 in drop legs feeding seal cylinders and small actuators, with the built-in check valve holding the circuit against backflow if the supply side dips.
In finishing booths, this unit conditions the air feeding spray guns and coating applicators. The round psi gauge lets operators set and read the regulated pressure directly at the point of use, and the differential-pressure drain keeps condensate out of the atomizing supply.
Choose GFR300 when your line needs filtration and regulation in one body at a 1/4 in port. This code fixes the real choices: the low-pressure regulator type (the exact regulation range for this variant is not published in the material we hold - confirm with us before ordering), 40 um standard filtration (order the W code for 5 um), the differential-pressure drain as the default, a round psi gauge, NPT thread (PT is the AirTAC standard; G and NPT are order options), no bracket (J) and a fitted check valve (K). Step up to 400 or 600, or down to 200, when your required flow points to a different port size.
Rated flow for this series is published as curves, not as a single figure, so send us your application flow and pressure and we will confirm sizing against 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 only as curves, not as a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
The L code marks the low-pressure regulator variant of the GFR300. The exact regulation range for this variant is not published in the material we hold, so please confirm the range with us before ordering. The rest of the code decodes as: 1/4 in NPT port, 40 um element, differential-pressure drain, round psi gauge, check valve fitted, no bracket.
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.