The AirTAC GFR30010ALC3WTK 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 GFR30010ALC3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body, with a 3/8 in NPT port. This configuration carries the 5 um filter element (code W) for finer water and particulate removal than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and the low-pressure regulator type (code L) for applications regulated at the lower end of the pressure scale. It is fitted with a round pressure gauge reading in bar, a reverse/check valve (code K), and a mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of PT, G (BSPP) or NPT threads, drain types (differential-pressure, automatic or manual), 40 um or 5 um filter grades, standard or low-pressure regulation, gauge styles and scales, and optional reverse/check valve. Flow figures for the series are published as curves rather than a single rated number, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR30010ALC3WTK 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, 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". |
| 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Feeds filtered, low-pressure regulated air to clamping fixtures on a machining centre, where the 5 um element helps protect fixture cylinders and the automatic drain handles condensate on a cell that runs unattended.
Supplies filtered and regulated air to spray equipment on a paint or coating line, where the low-pressure regulator type and bar-reading round gauge give operators straightforward control at the booth.
Conditions the air feeding directional-control valve islands on a packaging machine, with the 5 um grade guarding solenoid valves and the reverse/check valve holding the circuit if supply pressure drops.
Start with the port step: this unit is the 300 size with a 3/8 in NPT port; larger sizes (400, 600) carry larger ports and more flow capacity, so step up if your line needs more air. Choose the drain to match access: automatic drain (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure drain is the default. Choose the filter grade by sensitivity of downstream equipment: 40 um is standard, 5 um (this unit) for finer protection. Gauge options are a round external gauge (this unit, bar scale) or the embedded square gauge, with MPa, psi or bar scales. Thread is NPT here; PT is the standard and G (BSPP) is an order option. A mounting bracket is included. For sizing, note that flow is published as curves, not a single rating - and as a low-pressure type, this unit's exact regulation range is not published - so ask us to confirm both against your application before ordering.
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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a rated flow, Cv or l/min number. Tell us your application and we will confirm the flow and sizing figures from the datasheet on request before you order.
The L code makes this a low-pressure regulator type, intended for applications regulated at the lower end of the pressure scale; its exact regulation range is not published, so we confirm it on request. The A code is the automatic drain: the bowl expels collected condensate on its own, so the unit does not need manual draining, unlike the manual-drain (M) or differential-pressure (blank) options.
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.