The AirTAC GFR300C10ALC3WTK AirTAC Filter Regulator NPT3/8 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 GFR300C10ALC3WTK is an AirTAC GFR-series filter regulator: a 5 um filter element and a pressure regulator combined in one body, so the compressed air is cleaned of water and particulate and then held at a set pressure in a single installation. This size 300 unit has a 3/8 in NPT port, an automatic drain that ejects collected condensate without manual attention, a polycarbonate bowl, the low-pressure regulator type, a round pressure gauge with bar scale, a reverse (check) valve, and a mounting bracket.
It is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um (W) filtration, gauge scales in MPa, psi or bar, 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 sizing figures from the datasheet for your application.
| Model | GFR300C10ALC3WTK AirTAC Filter Regulator NPT3/8 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. |
|---|---|
| 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 machining cell where fixtures clamp with air cylinders, this unit filters the shop air to 5 um and holds a steady regulated supply to the clamping valves, with the fitted check valve in the circuit and the bracket allowing panel mounting beside the cell.
Feeding the cylinders and air valves on a carton-sealer: the 5 um element removes water and pipe scale that would gum the spools, and the regulator lets the line set the actuator pressure for each box size being run.
Supplying spray guns and air-operated agitators in a paint booth: filtered air protects the finish, and the low-pressure regulator type suits booth equipment that is run at reduced pressure settings.
Size and port set the air capacity: this is size 300 with a 3/8 in NPT port, and you can step up to size 400 or 600, or down to 200, as your demand changes. Filtration is 5 um here (code W); the standard grade is 40 um if your application tolerates coarser filtration. The automatic drain suits unattended duty, while manual (M) and differential-pressure (blank) drains are the alternatives. Gauge scales can be ordered in MPa, psi or bar, and the thread is NPT here while PT is the AirTAC standard and G (BSPP) is also available.
Because AirTAC publishes flow as curves rather than one rated figure, we do not quote a single flow number. Send us your application details and we will confirm sizing from the datasheet before you order. The regulation range of this low-pressure type is likewise not published as a single figure; we will confirm it on request.
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 flow number here. Tell us your application and we will read the sizing off the datasheet and confirm it before you order.
The A in this code means the bowl drains itself: collected condensate is ejected automatically, which suits unattended or enclosed installations. AirTAC also offers manual (M) and differential-pressure (blank) drains across the GFR family if you prefer 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.