The AirTAC GFR30010LJF3WTK AirTAC Filter Regulator NPT3/8, 5 um 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 PT3/8" 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 GFR30010LJF3WTK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and then regulates the downstream pressure. This configuration has 3/8 in NPT ports, a 5 um filter element (code W, against the 40 um standard), and a differential-pressure drain that automatically bleeds collected condensate as the pressure drop across the element rises. The regulator is the low-pressure (L) type, an embedded square gauge scaled in bar is fitted, a reverse/check valve (K) is included, and no mounting bracket is fitted (code J). Max inlet pressure is 1.0 MPa (145 psi), the polycarbonate bowl and unit are rated -5 to 70 C with non-freezing air, and only the 600 size moves to an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family runs in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and the catalogue options cover manual or automatic drains, the 40 um standard element, MPa, psi or bar gauge scales, G, NPT or PT threads, mounting brackets, and single units or combined F.R.L. sets. Flow is published as curves rather than one rated figure, so ask us to confirm the figures for your application and we will send the datasheet.
| Model | GFR30010LJF3WTK AirTAC Filter Regulator NPT3/8, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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 — square, bar 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| 3 | Gauge scale: bar. 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Filtered, regulated air to the clamping cylinders on a pneumatic press, where the low-pressure type suits circuits holding a reduced set pressure and the check valve keeps downstream pressure in the clamp if the upstream supply dips.
Point-of-use preparation for a machining center's tool-change cylinder and pneumatic part clamps: the 5 um element protects directional valves from particulate and water while the regulator holds a steady working pressure at the machine.
Regulated air for diverter and pusher actuators on a bottling or carton conveyor, with the differential-pressure drain clearing the condensate that collects over long production runs.
Step through the real choices before ordering. Size 300 sits mid-range (200, 300, 400, 600) and the port step up from 1/4 to 1/2 in should follow the flow your line needs - we confirm that against the published curves, since there is no single rated figure. Drain type is a genuine decision: this code keeps the differential-pressure default, while A gives automatic and M gives manual draining. The element is 5 um here (W) instead of the 40 um standard, the gauge is the embedded square type scaled in bar with MPa and psi scales available as alternatives, and the thread is NPT where PT is the standard and G is the other order option. The L code makes this the low-pressure regulator variant, so send us your set pressure for confirmation, and note that J means no bracket while the default includes one.
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 G-series flow as curves, not as a single rated figure, so we do not quote a number here. Send us your inlet pressure and the flow your application needs and we will confirm sizing from the datasheet and share the curves on request.
It selects the low-pressure regulator variant instead of the standard type. Our datasheet does not publish a numeric range for this variant, so tell us the set pressure your circuit needs and we will confirm suitability from the datasheet 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.