The AirTAC GFR30010ALJNT AirTAC Filter Regulator NPT3/8 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 PT3/8" ports, a automatic 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 GFR30010ALJNT is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air with the standard 40 um element, then regulates downstream pressure. This unit is the low-pressure type, so it is intended for circuits that run at reduced regulated pressure rather than full line pressure. The automatic drain expels collected condensate from the PC (polycarbonate) bowl without manual attention, and the 3/8 in NPT port suits medium-flow lines. No gauge is fitted and no mounting bracket is supplied with this configuration.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with a choice of ports, thread options (PT standard, G and NPT to order), drain types (differential-pressure, automatic or manual), a 5 um element option and gauge variants. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application.
| Model | GFR30010ALJNT AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| Reflux valve | Not fitted |
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". |
| A | Drain: Automatic 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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. |
| (blank) | No reverse-flow valve (the default). |
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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a CNC machining cell where pneumatic clamps hold workpieces at a reduced regulated pressure, the GFR30010ALJNT cleans the supply air with its 40 um element and regulates it in one body. The automatic drain keeps condensate out of the bowl on a cell that runs unattended between shift checks.
Packaging conveyors with pneumatic diverters and pushers need clean, regulated air at moderate pressure. Mounted at the line drop in 3/8 in NPT, this low-pressure type filter regulator conditions the branch supply, while the automatic drain handles moisture collected along the run.
Bench-mounted lab automation, test rigs and sample-handling actuators often run at deliberately low regulated pressures. The GFR30010ALJNT filters the shop-air feed and regulates it down in a single compact unit, with the low-pressure type regulator suited to those reduced setpoints.
Sizing a GFR300 filter regulator starts with the port step: size 300 in a 3/8 in NPT port sits in the middle of the range, so match it to your line size and required flow. Because flow is published as curves and not a single rated figure, ask us to confirm the sizing against your application before ordering. Choose the drain to suit access: this unit has an automatic drain, which suits installations that are not checked daily; manual and differential-pressure drains are available in the family. The standard filtration grade is 40 um, with a 5 um element (code W) where finer filtration is needed. This is the low-pressure type (code L); its regulation range is not published in the catalogue, so confirm the range with us if your set pressure is critical. No gauge is fitted on this code - gauge options with MPa, psi or bar scales exist in the family if you want local pressure indication. Thread: this unit is NPT; PT is the standard option and G (BSPP) is also available to order. A bracket can be ordered (code J here means none is supplied).
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your line size and flow demand and we will confirm the sizing against the datasheet curves on request before you order.
The GFR30010ALJNT is supplied without a gauge (code N) and without a bracket (code J). The GFR family offers gauge variants, including an embedded square gauge and an external round gauge with MPa, psi or bar scales, so if you need local pressure indication we can quote an equivalent GFR300 configuration with a gauge fitted.
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.