The AirTAC GFR30010ALJC1WT AirTAC Filter Regulator NPT3/8 Low-Pressure 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 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 AirTAC GFR30010ALJC1WT is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit is ordered with a 3/8 in NPT port, the fine 5 um filter element (code W), an automatic drain that vents collected condensate without manual attention, and a round pressure gauge with an MPa scale. It is the low-pressure type (code L) and is supplied without a mounting bracket (code J). The polycarbonate bowl suits the 300 size, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature range of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, drain choices of differential-pressure, automatic or manual, 40 um standard or 5 um fine filtration, and embedded square or external round gauges in MPa, psi or bar scales. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application before ordering.
| Model | GFR30010ALJC1WT AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa scale |
| 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. |
| (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. |
| (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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
A fixture clamping circuit on an assembly line needs filtered air held at a low, stable regulated pressure so clamps seat consistently without overloading the workpiece; this low-pressure filter regulator conditions and controls that branch from a single body.
Bagging and cartoning machines run short air jets and actuator strokes that are sensitive to water carryover; the 5 um element with automatic drain keeps condensate and fine particles out of the valves while the regulator holds the branch pressure the machine was set up with.
A laboratory test bench or pilot rig drawing instrument air from a shop compressor benefits from fine 5 um filtration and a low regulated pressure with a visible MPa gauge, and the automatic drain keeps the bowl clear between test runs.
Step up or down through the GFR sizes (200/300/400/600) to match the port and the flow your line needs - this unit sits at size 300 with a 3/8 in NPT port. Choose the 5 um element (this code, W) when downstream valves, cylinders or instruments need finer air than the 40 um standard element provides. The automatic drain on this unit suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives in the family. This is the low-pressure type, so if your regulated setpoint sits below the standard regulator's comfort zone, confirm the exact range with us. The round MPa gauge is fitted here; square embedded gauges and psi or bar scales are options. NPT is ordered as the T thread variant; PT is the catalogue standard and G (BSPP) is also available. No mounting bracket is included with this code (J), and a reverse/check valve is not fitted.
Because flow is published as curves and not a single rated figure, send us your application details 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. 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 GFR series as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow and sizing data from the datasheet on request before you order.
Both are decoded from the model code: A is the automatic drain, which ejects collected condensate on its own instead of waiting for a manual or differential-pressure drain event, and W selects the fine 5 um filter element in place of the 40 um standard. The automatic drain suits installations that are not checked daily, and the 5 um grade suits downstream equipment that needs finer air.
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.