The AirTAC GFR30008LJC1WTK AirTAC Filter Regulator NPT1/4 is a genuine G-series filter regulator: water separation, 5 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 filter-regulator body, so one 300-size unit cleans the air and holds a steady downstream pressure for actuators, valves and tools. This configuration, the GFR30008LJC1WTK, is built for 1/4 in NPT ports, carries the fine 5 um filter element (code W) instead of the standard 40 um, drains condensate by the differential-pressure method, and is the low-pressure regulator type. It is fitted with an external round pressure gauge scaled in MPa and a reverse/check valve (code K), and it is ordered without a mounting bracket (code J). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in and thread choices of PT (standard), G (BSPP) or NPT. We do not quote a single rated flow figure because AirTAC publishes flow only as curves; ask us and we will confirm the flow and datasheet figures for this exact model against your application.
| Model | GFR30008LJC1WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 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, 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding clean, finely filtered and steadily regulated low-pressure air to the flap-fold and taping cylinders on a carton-sealing conveyor, where a 5 um element protects the small control valves from fine particulate.
Supplying regulated air to the clamp/unclamp cylinders of a CNC workholding fixture, with the check valve holding the downstream circuit and the MPa gauge giving the operator a clear setpoint reading.
Conditioning shop compressed air for a bench-top test rig that needs fine 5 um filtration and a gentle, stable low-pressure supply, with the differential-pressure drain quietly removing accumulated condensate.
Start with the port step: this unit is the 300 size with 1/4 in NPT threads, so match it to your line size and the flow your circuit needs - larger sizes (400, 600) carry more flow if your demand grows. The 5 um element (code W) is the right choice when downstream valves, cylinders or instruments are sensitive to fine particulate; the standard element is 40 um if coarse protection is enough. Drain choice matters too: this unit uses the differential-pressure drain, while automatic (A) and manual (M) versions exist - automatic suits unattended installations, manual suits periodically attended ones. The round MPa gauge is fitted here; square embedded gauges and psi or bar scales are alternatives. Note this is the low-pressure regulator type, so confirm its adjustment range suits your setpoint before ordering.
Be aware of the honest limits: AirTAC publishes flow as curves rather than a single rated figure, so send us your application details and we will confirm sizing and the datasheet before you order. Thread is NPT here as a catalogue option - PT is the standard thread, and G (BSPP) is also available. If you need a mounting bracket, choose a code without the J suffix.
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 GFR300 series as curves rather than a single rated figure, so we do not quote one number. Tell us your line pressure, port size and the flow your circuit needs, and we will confirm the flow figures from the datasheet for this exact model before you order.
The W in the code GFR30008LJC1WTK selects the optional 5 um filter element instead of the 40 um standard, which suits sensitive downstream valves and instruments. The K selects a built-in reverse/check valve, and C1 fits the external round gauge scaled in MPa. The J means no mounting bracket, and the L marks the low-pressure regulator type. If you would rather have the standard 40 um grade, no check valve or a bracket, ask us for the matching GFR300 code.
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.