The AirTAC GFR30008LJF1TK 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 GFR30008LJF1TK is a GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built for a 1/4 in NPT port and is the low-pressure (L) regulator type. It comes with a differential-pressure drain, a 40 um standard filter element, a polycarbonate bowl, an embedded square gauge scaled in MPa and a built-in reverse (check) valve; no mounting bracket is included with this variant. 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 GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and with choices of drain type, filter grade (40 um standard, 5 um optional), gauge style and scale, thread (PT standard; G and NPT to order) and bracket. AirTAC publishes flow only as curves rather than a single rated figure, so we confirm flow and other datasheet figures on request before you order.
| Model | GFR30008LJF1TK 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 — square, MPa 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. |
| 1 | Gauge scale: MPa. 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) |
Filtered, regulated air for the clamp cylinders on a CNC fixture, with the fitted check valve backing up the regulated setting against upstream pressure dips.
A filtered, regulated feed for spray guns and coating heads on a finishing line, where the low-pressure (L) regulator type matches circuits run below standard line pressure.
Point-of-use preparation for the cylinders and air jets on a packaging or cartoning line, with the 40 um element and differential-pressure drain helping keep water and debris out of downstream valves.
Within GFR300 the real, decodable choices are: the port step (this unit takes 1/4 in NPT; larger sizes step up to 3/8 in, 1/2 in and beyond as flow demand grows), the drain type (differential-pressure as here, automatic with code A, or manual with code M), the filter element (40 um standard, 5 um with code W), the gauge (embedded square as fitted here, optional external round, with MPa, psi or bar scales) and the thread (PT is the AirTAC standard; G and NPT are ordered variants). This unit is the low-pressure (L) regulator type with a check valve (K) and no bracket (J). Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GFR flow as curves rather than a single rated figure, so no flow number is quoted here. Send us your application details and we will confirm the flow and sizing from the datasheet on request before you order.
Differential-pressure drain is the default on GFR units: condensate is drained in service as the pressure differential across the filter element builds. If you prefer a fully automatic drain, specify code A; for a manual drain, specify code M. This unit, GFR30008LJF1TK, uses the differential-pressure type.
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.