The AirTAC GFR300C08ALNWTK AirTAC Filter Regulator NPT1/4 5 um 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 AirTAC GFR300C08ALNWTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for low-pressure duty, with a 5 um filter element (code W), an automatic drain that clears collected condensate without manual attention, a metal bowl, and a reverse/check valve (code K) fitted. Ports are NPT1/4, no gauge is included, and a mounting bracket comes with the unit.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200, 300, 400, 600) covering ports from 1/8 to 1 inch, offered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge options and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm figures from the datasheet for your application.
| Model | GFR300C08ALNWTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
On a CNC fixture circuit running at reduced supply pressure, this unit filters machining-air moisture down to 5 um ahead of the regulator, while the fitted check valve helps hold the clamp circuit if the main supply dips. The automatic drain clears condensate without a daily manual blow-down routine.
On a carton-forming and sealing line, the GFR300C08ALNWTK provides one filtered, regulated supply point for low-pressure actuator circuits. The 5 um element protects valve spools and cylinder seals from particulate, and the automatic drain keeps water out of the machine's air drop.
Feeding low-pressure blow-off nozzles on a bottling conveyor, this unit removes the water and fine particulate that would spot containers or clog nozzles, regulates the low working pressure the nozzles require, and its automatic drain handles condensate carried over from a humid compressor room.
Size 300 with 1/4 inch NPT ports sits mid-range in the GFR line: step up to 400 or 600 for larger ports and more flow, or down to 200 for compact panels - match the size to the flow your circuit needs. This code is the low-pressure regulator type with a 5 um element and automatic drain; if condensate is light, a manual or differential-pressure drain variant may suit, and 40 um is the standard element grade where finer filtration is not required. No gauge is fitted on this code; gauge variants offer an embedded square gauge or an external round gauge scaled in MPa, psi or bar. PT is the standard thread and G or NPT are order options - this unit is ordered with NPT. The exact regulation range for the low-pressure type is not published, so confirm it with us, and because flow is published as curves rather than a single rating, ask us to check 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 G-series flow as curves rather than a single rated figure, so we do not quote one number. Send us your application details - working pressure and the air your equipment needs - and we will confirm the sizing from the datasheet before you order.
No. The N in the code means no gauge is fitted. Across the GFR range you can choose variants with an embedded square gauge or an external round gauge, scaled in MPa, psi or bar - select the gauge code when ordering if you want a pressure readout at the unit.
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.