The AirTAC GFR300C08LC1WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08LC1WTK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/4 in NPT port, a fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a low-pressure regulator type for duty below the standard range. It is fitted with an external round gauge on the MPa scale and a reverse (check) valve, and the mounting bracket is included.
This is a genuine AirTAC part from the GFR line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of drain types, 40 um or 5 um filtration, gauge styles and scales, and PT, G or NPT threads. Rated 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 or any datasheet figure for your application before ordering.
| Model | GFR300C08LC1WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
A low-pressure regulator type with fine 5 um filtration suits finishing lines, where spray guns and air-assisted applicators need clean air held at a gentle, stable setting rather than full line pressure.
On carton sealers and wrap stations, this filter regulator conditions the air feeding cylinders and grippers, while the check valve keeps the circuit from losing its setting if the upstream supply dips.
Fixture clamps benefit from filtered, low-pressure-regulated air and the fitted reverse valve, which helps hold the clamped state during momentary supply drops so parts stay secured during cutting.
Start with the port step: this unit is the size 300 body on a 1/4 in NPT port; step up to size 400 or 600 if your line needs more flow capacity, or down to size 200 for compact points of use. The 5 um element (code W) is the finer choice over the 40 um standard where downstream valves and instruments need cleaner air. The differential-pressure drain needs no operator action; choose an automatic or manual drain variant if your duty cycle or access demands it. Gauge scale is set here to MPa; psi and bar scales and a square embedded gauge are available in the family. PT is the standard thread and G or NPT are order options - this unit is built on NPT. A bracket is included, and the K code adds a reverse/check valve that holds downstream pressure if upstream supply drops. Because flow is published as curves and the low-pressure adjustment range is not given as a single figure, send us your application conditions and we will confirm the numbers from the datasheet before you order.
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 GFR300 as curves, not as a single rated figure, so we do not quote a number on the page. Send us your line pressure, downstream setting and expected air demand, and we will confirm the right size from the datasheet before you order.
The trailing K means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply drops. The L code marks this as the low-pressure regulator type, intended for settings below the standard range; the exact adjustment span for this variant is not published as a single figure, 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.