The AirTAC GFR300C10ALNWTK AirTAC Low-Pressure Filter Regulator NPT3/8 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 GFR300C10ALNWTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is the 300 size with a 3/8 in NPT thread, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a reverse (check) valve fitted (code K). It is the low-pressure type (code L) for circuits that run below standard regulator settings; the exact set range for the low-pressure type is not published, so confirm it against your application before ordering. No gauge is fitted (code N). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The polycarbonate bowl suits the 300 size, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR range, which spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 to 1 inch, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um filtration, gauge options, PT, G or NPT threads, and bracket variations. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application on request.
| Model | GFR300C10ALNWTK AirTAC Low-Pressure Filter Regulator NPT3/8 |
|---|---|
| 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) |
On a paint or coating booth, feed the atomizing-air circuit through this unit: the 5 um element keeps fine particles out of the spray heads while the low-pressure regulator holds the gentle, stable pressure atomizing nozzles need.
Hot-glue applicators and coating heads on a cartoning or labeling line typically run at low pressures. This filter regulator cleans the supply, drains condensate automatically between shifts, and its check valve holds the set circuit if upstream pressure dips.
Pneumatic clamps and hold-downs on a machining fixture that must not over-grip delicate work benefit from the low-pressure regulator type, with the 5 um element protecting the valve and cylinder seals from particulates.
Size the GFR range by stepping through the 200 / 300 / 400 / 600 sizes and their ports (1/8 to 1 inch) against the flow your line needs; the 300 size with a 3/8 in port sits mid-range. Choose the drain to match maintenance practice: automatic (this unit) drains itself, manual needs a scheduled bleed, and differential-pressure drain is the catalogue default. Choose the 5 um element (code W, fitted here) when downstream equipment needs finer filtration than the 40 um standard. Decide on a gauge and its scale (MPa, psi or bar), the thread family (PT is the standard; G and NPT are order options, NPT on this unit), and whether a bracket is wanted (included here). Flow for the series is published as curves, not a single rating, so 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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, set pressure and expected air demand, and we will confirm the flow and datasheet figures for this exact model on request before you order.
The code N in GFR300C10ALNWTK means no gauge is fitted; gauge options with MPa, psi or bar scales are available in the GFR range if you want one. The L code marks the low-pressure regulator type, intended for circuits below standard regulator settings; since the exact low-pressure range is not published, confirm it with us against your application. The unit also carries a 5 um element, an automatic drain and a fitted check valve.
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.