The AirTAC GFR300C10ALJNWT AirTAC Filter Regulator NPT 3/8 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 See datasheet 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 GFR300C10ALJNWT is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in one body, with a drain bowl and no lubricator. This configuration is size 300 with a 3/8 in NPT thread, carries the 5 um filter element (code W), drains condensate automatically, and is the low-pressure regulator type. The bowl is metal, and the unit is supplied without a gauge and without a mounting bracket. 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 spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options include differential-pressure, automatic or manual drains, 40 um or 5 um elements, gauge styles and scales, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm flow and full datasheet details on request.
| Model | GFR300C10ALJNWT AirTAC Filter Regulator NPT 3/8 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (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. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Point-of-use air prep for a solenoid-valve manifold on an assembly line: the 5 um element helps protect pilot spools from particulate and the automatic drain clears condensate without operator attention.
Air preparation for a clamping or holding circuit on a machining fixture specified with a low-pressure regulator type, giving one body that both filters the supply and holds the set pressure.
Filtered, regulated air for cylinders driving gates, diverters and pushers on a packaging conveyor, where automatic drainage suits a line that runs unattended between shifts.
Step through sizes 200, 300, 400 and 600 and match the port (here 3/8 in NPT) to your air line, then check the flow curve for the size against your demand - we can read the curve with you. Drain choice matters: this code is automatic drain, while manual and differential-pressure versions of the same unit exist. The 5 um element (W) gives finer filtration than the 40 um standard. No gauge is fitted on this code; gauge styles and pressure scales can be ordered. Thread here is NPT - PT is the standard thread and G is also a catalogue option. No bracket is included; brackets are optional. Because flow is published as curves and not a single rating, 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. 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 number here. Send us your required flow and working pressure and we will confirm from the datasheet whether this 3/8 in size suits your application.
This code carries the automatic drain (A), so accumulated condensate is discharged from the bowl without manual intervention. The same filter regulator is also available with a manual drain or a differential-pressure drain if your installation prefers a different arrangement.
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.