The AirTAC GFR30010LNWTK 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 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 GFR30010LNWTK is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration is the 300 size with a 3/8 in NPT port, the low-pressure regulator type, a 5 um filter element (code W, versus the standard 40 um), a differential-pressure drain, a reverse/check valve fitted, and no gauge. The polycarbonate bowl lets you see accumulated condensate, and the mounting bracket is included. 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 in to 1 in, manual or automatic drain options, 40 um or 5 um elements, gauge choices, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure for your application before ordering.
| Model | GFR30010LNWTK 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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". |
| (blank) | Drain: Differential-pressure 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. |
| 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. |
| 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) |
On a paint or coating line, this unit filters moisture and 5 um particles out of the supply and holds a low, stable setting to the spray guns, with the check valve keeping the setting steady if the shop air dips.
Feeds a lab pneumatic test rig that runs at reduced pressure, combining clean, dried air with gentle regulation, while the differential-pressure drain clears condensate without interrupting the test.
Serves the low-pressure actuator circuit on a packaging or labeling machine, delivering filtered air at a controlled setting and holding it through supply fluctuations via the fitted check valve.
The 300 size with a 3/8 in NPT port is a mid-range step in the GFR line; step up to the 400 or 600 size if your circuit needs more flow capacity, or down to 200 for compact lines. This unit carries the 5 um element (code W) - choose it over the standard 40 um where downstream equipment needs finer air. The low-pressure regulator type (code L) is intended for circuits that work below standard regulating ranges; the exact low-pressure adjustment range is not published, so confirm it with us. No gauge is fitted (code N), so add a gauge if you need to set and monitor pressure. The reverse/check valve holds downstream pressure when the supply drops. PT is the standard thread; G and NPT are catalogue options to order. Flow is published as curves, 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as performance curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure, downstream setting and required flow, and we will confirm against the datasheet whether this 3/8 in unit is correctly sized - or whether you should step to the 400 or 600 size.
The N in the code means no gauge is fitted, so add a gauge if you need to set and monitor the downstream pressure. The L means this is the low-pressure regulator type, intended for circuits working below standard regulating ranges; the exact low-pressure adjustment range is not published, so ask us to confirm it for your application.
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.