The AirTAC GFR300C08ALC3TK AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR300C08ALC3TK is a 300-size filter regulator that cleans compressed air and holds downstream pressure in one body. This configuration is decoded as follows: 1/4 in NPT ports, the low-pressure regulator type, an automatic drain that bleeds collected condensate from the bowl without manual attention, the standard 40 um filter element, a round pressure gauge with bar scale fitted, a reverse/check valve, and the mounting bracket included. It is built for circuits that need filtered air at reduced, stable pressure but do not require lubrication.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port options from 1/8 to 1 inch, PT as standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, a 40 um standard or 5 um (W) filter element, and square or round gauges in MPa, psi or bar scales. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR300C08ALC3TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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) |
Fixture clamps and swing cylinders on an assembly line that run at reduced pressure get filtered air and a held setpoint from one compact unit, with the check valve holding the circuit if supply dips.
Carton sealers and case packers with air-driven pushers and grippers need water and particulate removed before it reaches valves and cylinders, and the automatic drain keeps the bowl clear through continuous shifts.
Bench rigs and pilot-scale test stations running instrument-grade pneumatic circuits use the low-pressure regulator type with its bar-scale gauge to set and read reduced pressure accurately.
Start with size and port: 200, 300, 400 and 600 step up in port and flow capacity, and this unit sits at 300 with 1/4 in NPT threads. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering. Then choose the drain: automatic (as fitted here) suits unattended duty, manual suits periodic checks, and differential-pressure is the default. Filter grade is 40 um standard or 5 um with code W for finer particulate. This is the low-pressure (L) type, so confirm your working band suits it. Gauge scale is MPa, psi or bar - this unit carries a round bar-scale gauge. Thread is PT as standard with G and NPT as order options, and the bracket is included.
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 rather than a single rated figure, so no one flow number applies. Send us your line pressure, downstream demand and allowable pressure drop and we will confirm the sizing from the datasheet before you order.
The A in the code sets the automatic drain, which ejects collected condensate from the bowl on its own - the alternatives are manual drain (M) or the differential-pressure default. The L sets the low-pressure regulator type, intended for reduced working pressures; its exact adjustment range is not published, so we confirm it from the datasheet on request.
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.